Remove obsolete sequential extraction path

.gitignore

@@ -1,3 +1,7 @@
+# build and testing artifacts
+notarius
+notarius-output
+
 # ---> Go
 # If you prefer the allow list template instead of the deny list, see community template:
 # https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
@@ -47,7 +51,8 @@ go.work.sum
 .LSOverride
 
 # Icon must end with two \r
-Icon
+Icon
+
 
 # Thumbnails
 ._*

AGENTS.md

@@ -1,3 +1,2 @@
-Please carefully review the documents in `docs/policy` before making any changes to this repository.
- - `architecture.md` provides the canonical high-level architecture policy for this repository.
- - `documentation.md` provides the canonical documentation policy for this repository.
+Please review `docs/development.md` for initial orientation in this repository
+and follow its task-specific reading guide.

README.md

@@ -4,33 +4,29 @@ Notarius is a Go CLI for extracting structured artifacts from source material
 with explicit, configurable pipeline modules.
 
 The current implementation reads Seriatim transcript JSON, chunks the source
-units, extracts D&D spell-cast artifacts with an OpenAI-compatible LLM, and
-writes JSON output plus diagnostics for each run.
+units, extracts D&D spell-cast artifacts with a Scriptorium-backed LLM runtime,
+and writes JSON output plus diagnostics when enabled.
 
 ```sh
-NOTARIUS_LLM_DEFAULT_BASE_URL=http://127.0.0.1:8080/v1 \
-NOTARIUS_LLM_DEFAULT_MODEL=your-model \
+OPENROUTER_API_KEY=... \
 go run ./cmd/notarius run dnd-session \
   --config examples/dnd-spells.config.yml \
   --input examples/seriatim-minimal-transcript.json
 ```
 
-If the provider requires authentication, set
-`NOTARIUS_LLM_DEFAULT_API_KEY` in the environment before running the command.
-Outputs are written under `./notarius-output/<run-id>/` unless `--output-dir`
-is provided.
+This invocation uses the maintained example configuration and input. See the
+configuration and operations references for profile selection, credentials, and
+run artifacts.
 
 Useful references:
 
 - [CLI reference](docs/cli.md)
 - [Configuration reference](docs/config.md)
 - [Operations](docs/operations.md)
-- [Troubleshooting](docs/troubleshooting.md)
 - [Seriatim input contract](docs/integrations/seriatim.md)
-- [OpenAI-compatible provider contract](docs/integrations/openai-compatible.md)
 - [JSON output contract](docs/integrations/json-output.md)
 - [D&D spell artifact contract](docs/integrations/dnd-spell-artifacts.md)
-- [Developer workflow](docs/policy/development.md)
-- [Internal architecture docs](docs/internal/overview.md)
+- [Developer guide](docs/development.md)
+- [Internal implementation docs](docs/internal/overview.md)
 - [Maintained example config](examples/dnd-spells.config.yml)
 - [Maintained example input](examples/seriatim-minimal-transcript.json)

docs/adr/0001-record-architecture-decisions.md

@@ -0,0 +1,23 @@
+# ADR-0001: Record architecture decisions as ADRs
+
+**Status:** Accepted
+**Date:** 2026-07-13
+
+## Context
+Architectural reasoning made during design (pattern choices, rejected
+alternatives, trigger conditions for revisiting) is lost if only the final
+state is documented.
+
+## Decision
+We keep a living overview in docs/policy/architecture.md describing current
+intended state, and immutable, numbered ADRs (Nygard format) in docs/adr/
+recording each significant decision, its alternatives, and its consequences.
+Changed decisions get a new ADR that marks the old one Superseded.
+
+## Alternatives considered
+- Overview doc only: loses the "why" and the rejected options.
+- arc42 / RFC-style design docs: heavier than warranted for a solo repo.
+
+## Consequences
+Small ongoing writing cost; durable reasoning trail; cheap onboarding for
+future contributors (including future-us).

docs/adr/0002-linear-pipes-and-filters-pipeline.md

@@ -0,0 +1,51 @@
+# ADR-0002: Linear pipes-and-filters pipeline, not a general DAG
+
+**Status:** Accepted
+**Date:** 2026-07-13
+
+## Context
+
+Notarius processes source material through one known workflow:
+
+```text
+input -> chunk -> extract -> merge -> normalize -> output
+```
+
+Input and chunking apply to the source as a whole. Each selected artifact lane
+then performs extract, merge, and normalize, after which output aggregates the
+lane outcomes. Chunk extraction has a natural scatter-gather shape, but no
+current use case requires arbitrary branches, joins, or user-defined stage
+topology.
+
+## Decision
+
+Notarius implements a fixed six-stage pipes-and-filters pipeline. Configuration
+selects implementations for these stages but cannot add stages, reorder them,
+or define an arbitrary graph.
+
+The framework owns stage sequencing and the scatter-gather boundary between
+chunk, extract, and merge. Extract results are handed to merge in deterministic
+source-chunk order regardless of execution strategy. Each artifact lane remains
+logically linear. Output runs after every selected lane has either produced an
+accepted normalized artifact or reached a recorded rejection. A framework
+execution failure aborts the pipeline.
+
+The runner's concrete internal representation and stage-specific scheduling
+policies are implementation details. Concurrency must preserve the pipeline's
+deterministic handoffs, validation behavior, and provenance, and all execution
+strategies must continue to honor context cancellation.
+
+## Alternatives considered
+
+- Build a general DAG engine now. This would support hypothetical branching
+  topologies, but would add scheduling, topology validation, configuration, and
+  state-management complexity without a current consumer. Revisit this choice
+  only when a concrete workflow requires a topology the fixed pipeline cannot
+  express.
+
+## Consequences
+
+The runner, configuration model, and operator mental model remain small. Stage
+ownership stays visible, and general chunking, merging, or normalization cannot
+be hidden inside extractors. A future DAG requirement will require an explicit
+architectural change rather than incremental exceptions to the fixed pipeline.

docs/adr/0003-typed-interfaces-with-two-zone-data-model.md

@@ -0,0 +1,119 @@
+# ADR-0003: Strongly typed stage interfaces with a two-zone data model
+
+**Status:** Accepted
+**Date:** 2026-07-13
+
+## Context
+
+Pipeline stages must exchange source data and extracted artifacts. Universal
+source data has one engine-wide meaning, while extracted artifacts have
+domain-specific shapes. Passing opaque bytes or `any` between all stages would
+make invalid wiring and merge behavior runtime concerns. Requiring JSON at
+every handoff would preserve interoperability but discard useful Go type safety
+while all modules are in-process.
+
+The framework must also support multiple configured artifact domains, durable
+checkpoints, diagnostics, and output encoders without making those consumers
+depend on every domain's Go types.
+
+## Decision
+
+Notarius uses two typed data zones followed by one serialized boundary.
+
+### Source zone
+
+Input and chunk stages use conservative, engine-owned document, segment, chunk,
+and source-reference types. Their exact Go names are implementation details.
+Every segment carries engine-owned source provenance identifying the source
+location from which it was produced. Chunks preserve the ordered provenance of
+their segments.
+
+Source-format-specific fields remain in input modules or explicitly namespaced
+metadata; they do not become framework contracts.
+
+### Domain artifact zone
+
+Each artifact lane has one domain-owned Go artifact type `T`. Its extract,
+merge, normalize, and domain-aware validation implementations use generic,
+strongly typed contracts over the same `T`. Raw JSON, opaque bytes, and `any`
+are not stage-handoff contracts within a lane.
+
+Each registered domain artifact type supplies a codec for `T`. The codec owns:
+
+- stable schema identity and an explicit schema version;
+- JSON serialization and deserialization;
+- the media type and schema metadata required at serialized boundaries; and
+- rejection of data that cannot be represented by the declared artifact
+  schema.
+
+An artifact type's JSON representation is a maintained domain contract.
+Changing it incompatibly requires a new schema version.
+
+Extract, merge, and normalize may change the contents of `T`, but they do not
+change the lane's canonical Go artifact type or artifact schema identity. An
+extractor maps any provider- or prompt-specific response type into `T` before
+returning. A future lane that requires different artifact types at different
+stages requires a new architectural decision.
+
+### Serialized boundary
+
+After normalization, each typed artifact is converted into an engine-owned
+serialized artifact containing bytes, media type, and schema metadata. Output
+aggregation and output encoders consume this type-erased form. Intermediate
+checkpoint and debug encodings do not become stage-handoff contracts.
+
+LLM transport, checkpoints, and opt-in debug recording are also explicit
+serialization boundaries. They may encode or decode a typed artifact through
+its domain codec, but they do not change the in-memory type used between
+extract, merge, normalize, and typed validators. Checkpoint reuse requires a
+compatible schema identity and version.
+
+An LLM structured-response schema is a module transport contract and may differ
+from the domain artifact schema. The calling module owns the response type and
+maps it into the canonical `T`; the artifact codec remains authoritative for
+artifact checkpoints and output serialization.
+
+The framework may use private type-erased adapters to store heterogeneous lane
+registrations and execute configured domains. Such an adapter must assemble a
+type-consistent lane before execution and must not expose `any` or raw payloads
+as module-facing handoffs inside the domain artifact zone.
+
+### Construction and dependencies
+
+Every module operation accepts `context.Context`. Modules receive stable runtime
+collaborators through an injected dependency set at construction time. In
+particular, LLM-using modules receive the application-provided structured LLM
+client and do not construct provider clients or bypass shared scheduling.
+
+The application boundary enforces one configurable global upper bound on
+in-flight LLM calls across all stages, lanes, retries, and validators.
+
+Configuration options are parsed and validated while a module is constructed,
+before that module executes. Per-run data such as source material, references,
+session identity, and lane identity remains operation input rather than a
+construction dependency.
+
+## Alternatives considered
+
+- Pass raw bytes between stages. This maximizes decoupling but moves wiring,
+  parsing, and merge errors to runtime and prevents domain types from being the
+  canonical in-process contract.
+- Require JSON plus schemas at every stage boundary. This is appropriate for an
+  out-of-process boundary, but adds serialization and parsing inside the current
+  in-process pipeline. The stable codec contract preserves this upgrade path if
+  remote plugins are introduced.
+- Use a uniform `Process(any) (any, error)` contract. This simplifies a fully
+  dynamic engine but turns incompatible module composition into type assertions
+  and runtime failures. The fixed topology does not require that tradeoff.
+
+## Consequences
+
+Domain pipelines gain compile-time handoff safety and explicit merge semantics.
+Serialization, schema compatibility, checkpoint decoding, and output erasure
+have named owners. Dynamic registration requires a small erased adapter around
+each typed lane, and generic stage implementations must be instantiated for a
+specific artifact type or behavior rather than manipulating arbitrary JSON.
+
+The engine-owned source model becomes a long-lived contract and must evolve
+conservatively. Domain authors must maintain a codec and versioned schema in
+addition to their Go artifact type.

docs/adr/0004-package-modules-by-domain.md

@@ -0,0 +1,81 @@
+# ADR-0004: Package modules by domain, not by stage
+
+**Status:** Accepted
+**Date:** 2026-07-13
+
+## Context
+
+Module packages can be grouped first by pipeline stage, such as
+`modules/chunk/dnd/scenes`, or first by domain, such as
+`modules/dnd/chunk/scenes`. A domain's extract, merge, normalize, validation,
+schema, prompt, and artifact-codec implementations collaborate around the same
+artifact types and are likely to evolve together.
+
+Go package dependencies also constrain registration. If shared types live in a
+domain root package, that package cannot import child implementation packages
+to register them because the children already import the root types.
+
+## Decision
+
+Production extensions are grouped by domain under:
+
+```text
+internal/modules/<domain>/<stage>/<name>
+```
+
+Shared artifact types live at the domain root, for example
+`internal/modules/dnd/types.go`. Domain-specific validators, prompt fragments,
+schemas, reference helpers, and codecs also live within that domain tree.
+
+Each domain exposes one production registration entry point from a sibling
+registrar package, for example `internal/modules/dnd/register`. The registrar
+may import the domain root and its child implementations; the domain root does
+not import its registrar or child packages. This keeps shared types available
+as `dnd.SpellList` without creating a Go import cycle.
+
+The `generic` tree is a peer extension family for reusable implementations that
+contain no concrete source-format or artifact-domain knowledge. Source-format
+and output-format families, such as Seriatim and JSON output, follow the same
+domain-first organization even when they do not define a type in the
+[domain artifact zone](0003-typed-interfaces-with-two-zone-data-model.md#domain-artifact-zone).
+
+Concrete domain implementation packages do not import another concrete domain.
+Generic extension packages never import concrete domains. A domain registrar
+may import domain-neutral generic extension packages to instantiate a reusable
+strategy for that domain's artifact type; the generic implementation remains
+unaware of the concrete type's domain semantics. Reuse needed directly by a
+domain implementation lives in a domain-neutral framework or helper package,
+not in a peer extension package.
+
+The application composition root may import multiple registrar packages, and
+black-box integration tests may compose multiple domains. Other cross-domain
+reuse occurs through engine contracts and composition-time registration rather
+than concrete peer-domain imports.
+
+A domain registrar owns registration of that domain's modules, validators,
+default validator chains, artifact codecs, schemas, and prompt assets. It does
+not take ownership of application execution or process behavior.
+
+## Alternatives considered
+
+- Group modules by stage. This keeps interchangeable strategies side by side,
+  but scatters a domain's shared artifact model and collaborating extensions
+  across the repository. It is preferable when generic strategy libraries
+  dominate or when the project is primarily a stage-extension framework rather
+  than an application composed from domain suites.
+- Put both shared types and `Register` in the domain root. This gives the
+  shortest import path but creates an import cycle once child implementations
+  import the root artifact types.
+
+## Consequences
+
+The repository layout makes supported domains immediately visible, and adding
+or extracting a domain affects one cohesive subtree. The CLI composition root
+depends on a small set of domain registrars instead of every leaf package.
+
+Package moves must preserve user-visible module and validator keys unless a
+separate compatibility decision changes them. Shared behavior that cannot be
+expressed through framework contracts may need to move into a domain-neutral
+framework package rather than creating a concrete peer-domain import. Registrar
+packages become explicit composition points for instantiating generic typed
+strategies, in addition to registering domain-owned implementations.

docs/cli.md

@@ -3,26 +3,15 @@
 This is the canonical reference for the implemented Notarius command-line
 interface.
 
-## Quick Run
-
-```sh
-NOTARIUS_LLM_DEFAULT_BASE_URL=http://127.0.0.1:8080/v1 \
-NOTARIUS_LLM_DEFAULT_MODEL=your-model \
-go run ./cmd/notarius run dnd-session \
-  --config examples/dnd-spells.config.yml \
-  --input examples/seriatim-minimal-transcript.json
-```
-
-Set `NOTARIUS_LLM_DEFAULT_API_KEY` if the OpenAI-compatible provider requires
-a bearer token.
+For the minimal end-to-end invocation, see the [README](../README.md).
 
 ## Commands
 
 ```text
 notarius help
-notarius run <pipeline-id> --input path/to/source.json [--config path/to/config.yml] [--only lane-a,lane-b]
-notarius config validate --config path/to/config.yml [--pipeline pipeline-id] [--only lane-a,lane-b]
-notarius pipelines list --config path/to/config.yml [--json]
+notarius run <pipeline-id> --input path/to/source.json [--config path/to/config.yml] [--only lane-a,lane-b] [--output-dir path] [--diagnostics-dir path] [--llm-profile id] [--resume] [--session-id id] [--reference selector=path] [--without-reference selector]
+notarius config validate [--config path/to/config.yml] [--pipeline pipeline-id] [--only lane-a,lane-b]
+notarius pipelines list [--config path/to/config.yml] [--json]
 ```
 
 Running `notarius` with no arguments, `notarius help`, `notarius --help`, or
@@ -36,26 +25,108 @@ file.
 Flags:
 
 - `--input path`: required source input file.
-- `--config path`: config file path. If omitted, Notarius checks
-  `NOTARIUS_CONFIG`, then `/usr/local/etc/notarius/config.yml`.
+- `--config path`: config file path. If omitted, Notarius uses the discovery
+  rules in [Configuration](config.md#discovery).
 - `--only lane-a,lane-b`: run only the named artifact lanes. Values are
   comma-separated and must be non-empty.
-- `--output-dir path`: output root. The run writes to `<path>/<run-id>/`.
-  Defaults to `./notarius-output`.
+- `--resume`: request checkpoint reuse for this invocation. See
+  [Operations](operations.md#checkpoints) for prerequisites and reuse behavior.
+- `--output-dir path`: output root. Defaults to `./notarius-output`.
 - `--diagnostics-dir path`: diagnostics work directory override for this
-  invocation.
-- `--llm-profile id`: override every effective module binding to use one LLM
-  profile.
+  invocation. It does not change the workspace directory.
+- `--llm-profile id`: override every effective LLM-capable pipeline module
+  binding with one Scriptorium profile ID. Validator-specific profiles are not
+  overridden.
+- `--session-id id`: pass a stable prompt session identifier through LLM-backed
+  module calls.
+- `--reference selector=path`: bind a reference path to a chunk, extractor,
+  merger, or normalizer reference slot. Repeatable.
+- `--without-reference selector`: remove a configured optional reference binding.
+  Repeatable. It accepts the same selector forms as `--reference`, without
+  `=path`.
 
-On success, the command prints the completed pipeline ID, approved and rejected
-artifact counts, and the output directory. If the run completes with warnings,
+On success, the command prints the completed pipeline ID, normalized output and
+rejected output counts, and the output directory. If the run completes with warnings,
 the warning count is printed to stderr.
 
-For durable output, diagnostics, retention, and failure inspection, see
-[Operations](operations.md).
+Reference flags are resolved against selected chunk, extractor, merger, and
+normalizer targets before the run starts. Flat slot names are accepted only
+when exactly one selected target declares that slot. For configured reference
+bindings, precedence, path resolution, and validation, see
+[Configuration](config.md#pipelines).
 
-The current `run` command requires the resolved pipeline to use exactly one
-distinct LLM profile after defaults and overrides are applied.
+`--reference` binds or replaces one slot for one selected target. Selectors are:
+
+- `slot=path`: valid when exactly one selected target declares `slot`;
+- `chunk.slot=path`: target the chunker;
+- `merge.slot=path`: valid when exactly one selected merger declares `slot`;
+- `lane.slot=path`: valid when exactly one selected extractor, merger, or
+  normalizer in that lane declares `slot`;
+- `lane.extract.slot=path`: target a lane extractor;
+- `lane.merge.slot=path`: target a lane merger;
+- `lane.normalize.slot=path`: target a lane normalizer.
+
+Use `slot=path` when the selected targets declare the slot unambiguously:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config examples/dnd-spells.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --reference roster=./campaign-roster.txt
+```
+
+Use an explicit selector when multiple selected targets declare the same slot or
+when you want to target a specific target:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config examples/dnd-spells.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --reference spells.extract.glossary=./campaign-glossary.txt
+```
+
+The same grammar can target chunk, merge, and normalize slots when the configured
+modules declare them:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config path/to/config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --reference chunk.scene_guide=./campaign-scenes.txt \
+  --reference spells.merge.merge_notes=./merge-notes.txt \
+  --reference spells.normalize.normalization_notes=./normalization-notes.txt
+```
+
+Use `--without-reference` to remove a configured optional binding for a run:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config examples/dnd-spells.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --without-reference glossary
+```
+
+Use `--session-id` when an external orchestrator needs all prompt calls from one
+run to share an identifier:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config examples/dnd-spells.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --session-id campaign-17-session-04
+```
+
+The resume flag can be added to an otherwise identical run invocation:
+
+```sh
+go run ./cmd/notarius run dnd-session \
+  --config examples/dnd-spells.config.yml \
+  --input examples/seriatim-minimal-transcript.json \
+  --resume
+```
+
+For checkpoint behavior, durable output, diagnostics, retention, and failure
+inspection, see [Operations](operations.md).
 
 ## `config validate`
 
@@ -63,8 +134,8 @@ distinct LLM profile after defaults and overrides are applied.
 
 Flags:
 
-- `--config path`: config file path. If omitted, discovery uses
-  `NOTARIUS_CONFIG`, then `/usr/local/etc/notarius/config.yml`.
+- `--config path`: config file path. If omitted, Notarius uses the discovery
+  rules in [Configuration](config.md#discovery).
 - `--pipeline pipeline-id`: additionally resolve one configured pipeline against
   the production module catalog.
 - `--only lane-a,lane-b`: validate resolution for selected artifact lanes. This
@@ -88,8 +159,8 @@ go run ./cmd/notarius config validate \
 
 Flags:
 
-- `--config path`: config file path. If omitted, discovery uses
-  `NOTARIUS_CONFIG`, then `/usr/local/etc/notarius/config.yml`.
+- `--config path`: config file path. If omitted, Notarius uses the discovery
+  rules in [Configuration](config.md#discovery).
 - `--json`: print `{"pipelines":[...]}` instead of one ID per line.
 
 Examples:
@@ -112,18 +183,6 @@ go run ./cmd/notarius pipelines list \
 - `2`: command syntax was invalid, a command was unknown, a required argument
   was missing, or a flag value was malformed.
 
-## Implemented Production Pipeline Modules
-
-The production CLI currently registers these module keys:
-
-- input: `seriatim`
-- chunk: `generic`
-- extract: `dnd/spells`
-- merge: `appendorder`
-- normalize: `noop`
-- output: `json`
-
-The production CLI does not currently register validator modules.
-
-For YAML structure, defaults, environment overrides, and module binding syntax,
-see [Configuration](config.md).
+For YAML structure, defaults, Scriptorium profile sources, environment
+overrides, and selectable module and validator keys, see
+[Configuration](config.md).

docs/config.md

@@ -2,117 +2,136 @@
 
 This is the canonical reference for implemented Notarius configuration.
 
-Notarius reads YAML config files with `version: 1`. File config is applied over
+Notarius reads YAML config files with `version: 2`. File config is applied over
 built-in defaults, then environment overrides are applied.
 
 ## Discovery
 
-Commands that accept `--config` load configuration in this order:
+Commands that load configuration use this order:
 
-1. the `--config` path, when provided;
+1. an explicit path supplied through the CLI, when provided;
 2. `NOTARIUS_CONFIG`, when set to a non-empty path;
 3. `/usr/local/etc/notarius/config.yml`.
 
 If none is available, the command fails with a config file not found error.
+The explicit-path option is defined in the [CLI reference](cli.md).
 
-## Minimal Example
+## Maintained Examples
 
-```yaml
-version: 1
-llm_profiles:
-  default:
-    provider: openai-compatible
-    base_url: http://127.0.0.1:8080/v1
-    model: your-model
-pipelines:
-  dnd-session:
-    input: seriatim
-    chunk:
-      module: generic
-      options:
-        max_units: 50
-    artifacts:
-      spells:
-        extract: dnd/spells
-```
+- [Minimal D&D spell configuration](../examples/dnd-spells.config.yml)
+- [Production-oriented D&D spell configuration](../examples/dnd-spells-production.config.yml)
 
-The maintained fixture is [examples/dnd-spells.config.yml](../examples/dnd-spells.config.yml).
+Both complete files are validated by the CLI test suite. The fragments below
+illustrate individual fields and are not alternate complete configurations.
 
 ## Top-Level Fields
 
-- `version`: required. The only supported value is `1`.
-- `llm_profiles`: optional map of LLM profile IDs to profile settings.
+- `version`: required. The only supported value is `2`.
+- `scriptorium`: optional Scriptorium profile source settings.
 - `pipelines`: optional map of pipeline IDs to pipeline definitions.
 - `concurrency`: optional global concurrency settings.
+- `workspace`: optional workspace settings for Notarius-owned local state.
 - `diagnostics`: optional diagnostics settings.
 
-Unknown YAML fields are rejected.
+Unknown YAML fields are rejected. The removed top-level `llm_profiles` field is
+rejected; execution profiles now come from Scriptorium.
 
 ## Defaults
 
 Built-in defaults:
 
-```yaml
-llm_profiles:
-  default:
-    provider: openai-compatible
-    timeout: 600
-    max_retries: 3
-    max_concurrency: 1
-concurrency:
-  total_llm: 1
-diagnostics:
-  work_dir: /tmp/notarius
-  retention: auto
-```
+- `concurrency.total_llm`: `1`
+- `concurrency.stage_workers.extract`: effective `concurrency.total_llm`
+- `diagnostics.work_dir`: `/tmp/notarius`
+- `diagnostics.retention`: `auto`
+- `workspace.directory`: unset
+- `workspace.diagnostics.enabled`: `true`
+- `workspace.resume.enabled`: `false`
+- `workspace.debug.enabled`: `false`
 
 No pipelines are built in. A run requires a configured pipeline.
 
-## LLM Profiles
+If `scriptorium` is omitted, Notarius uses Scriptorium's built-in profile
+catalog. Prompt definitions may also name default profile IDs. The current D&D
+scene and spell prompts default to the built-in `mistral-small-3` profile when a
+module binding does not set `llm_profile`. That built-in profile reads its
+credential from `OPENROUTER_API_KEY`.
 
-Each `llm_profiles` entry may contain:
+## Scriptorium Profiles
 
-- `provider`: optional provider key. Empty means `openai-compatible`; any other
-  non-empty value must be `openai-compatible`.
-- `base_url`: provider base URL. Required for actual LLM calls.
-- `model`: provider model name. Required for actual LLM calls.
-- `api_key_env`: environment variable name to read for the API key.
-- `timeout`: request timeout as whole seconds or a Go-style duration string such
-  as `10m`.
-- `max_retries`: retry count for provider calls. Must be zero or greater.
-- `max_concurrency`: per-profile LLM concurrency. Must be zero or greater; when
-  zero, Notarius uses `concurrency.total_llm`.
+`scriptorium` fields:
 
-Raw API keys are not accepted as file config fields. Use `api_key_env` or an
-environment override.
+- `profile_dir`: optional directory containing Scriptorium profile YAML files.
+- `profile_file`: optional Scriptorium profile YAML file.
+
+`profile_dir` and `profile_file` are mutually exclusive. Custom profiles
+overlay Scriptorium built-in profiles by profile ID.
+
+Scriptorium profile files use Scriptorium's profile schema. A minimal profile
+looks like:
+
+```yaml
+id: local-fast
+endpoint: http://127.0.0.1:8080/v1
+model: your-model
+api_key_env: SCRIPTORIUM_API_KEY
+timeout_seconds: 180
+```
+
+Notarius does not accept raw API keys in Notarius config. For file-backed
+Scriptorium profiles, store the environment variable name in `api_key_env` and
+set that variable in the run environment. Scriptorium rejects raw `api_key`
+fields in profile YAML.
 
 ## Environment Overrides
 
 These environment variables are applied after the config file:
 
 - `NOTARIUS_CONFIG`: config discovery path.
-- `NOTARIUS_LLM_DEFAULT_API_KEY`: API key for the `default` LLM profile.
-- `NOTARIUS_LLM_DEFAULT_BASE_URL`: base URL for the `default` LLM profile.
-- `NOTARIUS_LLM_DEFAULT_MODEL`: model for the `default` LLM profile.
-- `NOTARIUS_LLM_DEFAULT_TIMEOUT_SECONDS`: integer timeout seconds for the
-  `default` LLM profile.
-- `NOTARIUS_LLM_DEFAULT_MAX_RETRIES`: integer retry count for the `default` LLM
-  profile.
-- `NOTARIUS_LLM_DEFAULT_MAX_CONCURRENCY`: integer max concurrency for the
-  `default` LLM profile.
 - `NOTARIUS_TOTAL_LLM_CONCURRENCY`: integer global LLM concurrency.
-- `NOTARIUS_WORK_DIR`: diagnostics work directory.
-- `NOTARIUS_DIAGNOSTICS_RETENTION`: diagnostics retention mode.
+- `NOTARIUS_STAGE_WORKERS_EXTRACT`: integer extract worker limit.
+- `NOTARIUS_WORKSPACE_DIR`: workspace directory.
+- `NOTARIUS_WORKSPACE_DIAGNOSTICS_ENABLED`: boolean diagnostics enablement.
+- `NOTARIUS_WORKSPACE_DIAGNOSTICS_RETENTION`: workspace diagnostics retention
+  mode.
+- `NOTARIUS_WORKSPACE_RESUME_ENABLED`: boolean resume checkpointing
+  enablement.
+- `NOTARIUS_WORKSPACE_DEBUG_ENABLED`: boolean debug artifact enablement.
+- `NOTARIUS_WORK_DIR`: deprecated diagnostics work directory compatibility
+  override.
+- `NOTARIUS_DIAGNOSTICS_RETENTION`: deprecated diagnostics retention
+  compatibility override.
 
-Integer environment values must parse as base-10 integers.
+Integer environment values must parse as base-10 integers. Boolean environment
+values must parse as Go booleans such as `true`, `false`, `1`, or `0`.
+
+The removed `NOTARIUS_LLM_DEFAULT_*` variables are not read. Configure provider
+endpoint, model, and credential environment variable names through Scriptorium
+profiles.
+
+## Concurrency
+
+`concurrency` fields:
+
+- `total_llm`: positive integer ceiling on concurrent provider calls.
+- `stage_workers`: optional map of framework worker limits. The only supported
+  key is `extract`.
+
+`stage_workers.extract` defaults to the effective `total_llm` value after file
+and environment precedence. It must be between `1` and `total_llm`, inclusive.
+Unknown or empty stage-worker keys are rejected. The environment override
+`NOTARIUS_STAGE_WORKERS_EXTRACT` takes precedence over the file value, as does
+`NOTARIUS_TOTAL_LLM_CONCURRENCY` for the global ceiling.
+
+The worker value is present in effective and redacted configuration. It bounds
+the fixed run-wide extract pool and its bounded dispatch queue. Extract jobs are
+submitted by source chunk and then resolved lane; `total_llm` independently
+bounds actual provider calls made by extracts, retries, and validators.
 
 ## Pipelines
 
-A pipeline defines the fixed Notarius workflow:
-
-```text
-input -> chunk -> extract -> merge -> normalize -> output
-```
+A pipeline selects implementations for the fixed workflow defined by
+[Architecture](policy/architecture.md#system-shape).
 
 Pipeline fields:
 
@@ -121,18 +140,88 @@ Pipeline fields:
 - `artifacts`: required for pipeline resolution. It maps artifact lane IDs to
   lane definitions.
 - `output`: optional module binding. Default module is `json`.
+- `references`: optional map of reference slot names to reference paths. These
+  bindings are defaults for eligible pipeline targets that declare the matching
+  slot.
 
 Artifact lane fields:
 
 - `extract`: required module binding.
 - `merge`: optional module binding. Default module is `appendorder`.
 - `normalize`: optional module binding. Default module is `noop`.
-- `validators`: optional list of module bindings. The production CLI currently
-  does not register validator modules.
+- `validators`: deprecated lane-level validator list. Non-empty lists are
+  rejected; use `extract.validators`, `merge.validators`, or
+  `normalize.validators`.
+- `references`: optional compatibility alias for extractor reference bindings.
+  Lane bindings override pipeline-level bindings for the same slot.
 
-`notarius run` and `notarius config validate --pipeline` resolve the pipeline
-against the production module catalog and fail fast for unknown or incompatible
-module keys.
+Commands that resolve a pipeline fail for unknown or incompatible module keys.
+See [CLI Reference](cli.md) for command syntax.
+
+Reference bindings are validated against reference slots declared by eligible
+chunk, extract, merge, and normalize targets during pipeline resolution. Required slots
+must be bound after config defaults, target-local references, lane-level
+compatibility bindings, and command-line reference overrides are applied.
+Config-relative paths are resolved relative to the config file; command-line
+reference paths are resolved relative to the current working directory. Bound
+files must be UTF-8 text. Reference media types are inferred from file
+extensions and checked when a module restricts accepted types; unknown
+extensions use `application/octet-stream`. See [CLI Reference](cli.md#run) for
+command-line selectors and [Operations](operations.md) for recorded provenance
+and sensitive-data handling.
+
+Pipeline-level `references` are defaults. They are valid when at least one
+eligible target in the full configured pipeline declares the slot, including
+chunk, extractor, merger, and normalizer targets. During a run, they apply only
+to the selected targets that declare the slot:
+
+```yaml
+pipelines:
+  dnd-session:
+    input: seriatim
+    references:
+      players: ./campaign/players.txt
+      party: ./campaign/party-roster.txt
+      glossary: ./campaign/glossary.txt
+    artifacts:
+      spells:
+        extract: dnd/spells
+```
+
+Extractor binding `references` are the canonical lane-local location. The
+legacy lane-level `references` field remains supported as an alias; when both
+bind the same slot, `extract.references` wins:
+
+```yaml
+pipelines:
+  dnd-session:
+    input: seriatim
+    references:
+      glossary: ./campaign/glossary.txt
+    artifacts:
+      spells:
+        references:
+          roster: ./campaign/legacy-roster.txt
+        extract:
+          module: dnd/spells
+          references:
+            party: ./campaign/session-party.txt
+```
+
+`chunk.references`, `merge.references`, and `normalize.references` are accepted
+in object-form bindings. They override pipeline-level defaults for slots
+declared by that target module. Extractor-local references apply only to the
+extractor, merger-local references apply only to the merger, and
+normalizer-local references apply only to the normalizer.
+
+Target-local reference fields use the same map shape at:
+
+- `pipelines.<id>.chunk.references`
+- `pipelines.<id>.artifacts.<lane>.extract.references`
+- `pipelines.<id>.artifacts.<lane>.merge.references`
+- `pipelines.<id>.artifacts.<lane>.normalize.references`
+
+Each binding is valid only when that target module declares the slot.
 
 ## Module Bindings
 
@@ -146,20 +235,46 @@ or object form:
 
 ```yaml
 chunk:
-  module: generic
-  llm_profile: default
-  options:
-    max_units: 50
+  module: dnd/scenes
+  llm_profile: local-fast
 ```
 
 Binding fields:
 
 - `module`: module key.
-- `llm_profile`: optional LLM profile ID. Empty means `default`.
+- `llm_profile`: optional Scriptorium profile ID. Empty or omitted lets the
+  Scriptorium prompt default select the profile.
+- `retries`: non-negative retry count for extra runtime attempts after the
+  first attempt. Default: `0`. Supported on `chunk`, `extract`, `merge`, and
+  `normalize` bindings.
 - `options`: optional module-specific settings.
+- `references`: optional reference bindings. Supported only for `chunk`,
+  `extract`, `merge`, and `normalize` bindings. `input` and `output` bindings
+  reject this field during validation.
+- `validators`: optional stage-local validator chain override. Supported only
+  for `chunk`, `extract`, `merge`, and `normalize` bindings. Omit the field to
+  use the production default chain; set `validators: []` to force an empty
+  chain; set a non-empty list to use exactly those validators in configured
+  order.
 
-The `--llm-profile` run flag overrides every effective module binding to use
-one configured profile.
+During resolution, each selected module's registered option validator runs.
+Production input, chunk, and output bindings reject unknown or invalid options
+with the affected binding context.
+
+Validator bindings use the same shorthand or object module-binding form, but
+only these fields are supported:
+
+- `module`: validator key.
+- `llm_profile`: optional Scriptorium profile ID for LLM-backed validators.
+- `options`: optional validator-specific settings.
+
+Validator bindings reject `references`, `retries`, and nested `validators`.
+During resolution, deterministic validators reject explicit `llm_profile`
+values.
+
+Configured LLM-backed validators with explicit `llm_profile` values are
+validated against the configured Scriptorium profile source. Deterministic
+production validators do not call the LLM and must not set `llm_profile`.
 
 ## Implemented Production Modules
 
@@ -167,10 +282,37 @@ one configured profile.
 | --- | --- | --- |
 | input | `seriatim` | Reads Seriatim transcript JSON. |
 | chunk | `generic` | Splits source units into ordered chunks. |
-| extract | `dnd/spells` | Extracts `dnd.spell_cast` artifacts. |
-| merge | `appendorder` | Keeps candidates in append order. |
-| normalize | `noop` | Passes merged artifacts through unchanged. |
-| output | `json` | Produces JSON output files. |
+| chunk | `dnd/scenes` | Uses an LLM to split transcript source units into D&D scenes. |
+| extract | `dnd/spells` | Extracts typed D&D spell-list artifacts. |
+| merge | `appendorder` | Combines typed artifacts in chunk order. |
+| normalize | `noop` | Passes merged typed artifacts through unchanged. |
+| output | `json` | Produces JSON output files for normalized `application/json` lanes. |
+
+## Implemented Production Validators
+
+| Key | Execution | Notes |
+| --- | --- | --- |
+| `generic/always_accept` | deterministic | Accepts returned module output. |
+| `generic/always_reject` | deterministic | Rejects returned module output with reason `always_reject`. |
+| `generic/valid_json` | deterministic | Rejects payloads that are not syntactically valid JSON. |
+| `generic/valid_json_schema` | deterministic | Rejects invalid JSON or JSON that does not conform to the module response schema. |
+| `extract/dnd/spells/shape` | deterministic | Rejects malformed D&D spell-list artifacts. |
+| `extract/dnd/spells/source_refs` | deterministic | Rejects missing or invalid D&D spell source references. |
+| `extract/dnd/spells/source_relatedness` | deterministic | Emits warnings when a spell name is not found near its cited source text. |
+
+The production default chain for the `dnd/spells` extractor is:
+
+```yaml
+validators:
+  - generic/valid_json
+  - generic/valid_json_schema
+  - extract/dnd/spells/shape
+  - extract/dnd/spells/source_refs
+  - extract/dnd/spells/source_relatedness
+```
+
+No other production module currently has a default validator chain. Empty
+chains approve output by default.
 
 The `generic` chunker accepts:
 
@@ -178,36 +320,90 @@ The `generic` chunker accepts:
 - `overlap_units`: non-negative integer, default `0`, and must be less than
   `max_units`.
 
+The `dnd/scenes` chunker requires transcript source capabilities, calls the
+configured structured LLM runtime, and does not accept module options. It
+declares optional `players`, `party`, and `glossary` references for scene
+disambiguation, and accepts `roster` as a deprecated compatibility alias for
+`party`.
+
+The `dnd/spells` extractor declares optional reference slots:
+
+- `players`
+- `party`
+- `glossary`
+- `roster` as a deprecated compatibility alias for `party`
+
+Both modules accept UTF-8 plain text, Markdown, YAML, or JSON reference files.
+The extractor uses references only as supporting disambiguation material; spell
+casts still must be present in the source transcript.
+
+## Workspace
+
+`workspace` fields:
+
+- `directory`: optional workspace root for Notarius-owned local state.
+- `resume.enabled`: boolean resume checkpointing setting.
+- `debug.enabled`: boolean debug artifact setting.
+- `diagnostics`: optional diagnostics settings defined below.
+
+`workspace.resume.enabled` and `workspace.debug.enabled` are independent.
+Enabling one does not enable the other. For directory layout, state lifecycle,
+permissions, and sensitive content, see [Operations](operations.md).
+
 ## Diagnostics
 
+Preferred workspace diagnostics fields:
+
+- `workspace.diagnostics.enabled`: set to `false` to skip creating diagnostics
+  run directories and diagnostics artifacts.
+- `workspace.diagnostics.retention`: `auto`, `always`, or `never`.
+
+Defaults for workspace and diagnostics fields are listed in
+[Defaults](#defaults).
+
+`workspace.diagnostics.retention` overrides legacy diagnostics retention when
+set.
+
 `diagnostics` fields:
 
-- `work_dir`: directory for per-run diagnostics. Default: `/tmp/notarius`.
-- `retention`: `auto`, `always`, or `never`. Empty uses `auto`.
+- `work_dir`: deprecated compatibility directory for per-run diagnostics.
+- `retention`: deprecated compatibility retention mode. `auto`, `always`, or
+  `never`.
 
-`auto` retains diagnostics for failed runs and successful runs with warnings.
-`always` retains diagnostics for every run. `never` removes diagnostics for
-successful runs without regard to warnings; failed runs are retained.
+Existing `diagnostics.work_dir`, `diagnostics.retention`, `NOTARIUS_WORK_DIR`,
+and `NOTARIUS_DIAGNOSTICS_RETENTION` inputs remain supported for compatibility.
+New configuration should use `workspace.directory` and
+`workspace.diagnostics.retention` instead.
 
-The `--diagnostics-dir` run flag overrides `diagnostics.work_dir` for that
-invocation.
+For retention behavior and the physical diagnostics layout, see
+[Operations](operations.md#retention). For the invocation-specific diagnostics
+override, see [CLI Reference](cli.md#run).
 
 ## Validation
 
 Configuration validation checks:
 
 - supported config version and known YAML fields;
+- mutually exclusive `scriptorium.profile_dir` and `scriptorium.profile_file`;
 - non-empty, non-duplicated IDs after trimming;
-- supported LLM provider and non-negative profile limits;
 - positive global LLM concurrency;
+- supported stage-worker keys and an effective extract worker count in the
+  inclusive range `1..concurrency.total_llm`;
 - supported diagnostics retention and non-empty work directory;
-- module binding LLM profiles refer to configured profiles.
+- stale removed fields such as `llm_profiles`.
 
 Pipeline resolution additionally checks:
 
 - the pipeline ID exists;
 - at least one artifact lane is declared and selected;
-- selected lanes exist when `--only` is used;
+- lanes selected through the CLI exist in the resolved pipeline;
 - required module keys are present;
 - module keys are registered for the expected slot;
-- module capability requirements are satisfied.
+- module capability requirements are satisfied;
+- non-empty validator overrides reference registered validator keys;
+- deterministic validators do not set `llm_profile`;
+- LLM-backed validators with explicit `llm_profile` values reference configured
+  Scriptorium profile IDs;
+- bound reference slots are declared by selected chunk, extractor, merger, or
+  normalizer targets;
+- required reference slots are bound for selected targets.

docs/development.md

@@ -0,0 +1,40 @@
+# Development
+
+This is the first-read landing page for people and LLM coding agents working on
+Notarius. It provides a concise repository orientation and routes each kind of
+change to its canonical documentation.
+
+Notarius is a Go CLI for configured structured extraction workflows. Start with
+the [README](../README.md) for product context, [Architecture](policy/architecture.md)
+for system boundaries, and [Internal Overview](internal/overview.md) for the
+implemented component map.
+
+## What To Read
+
+| When working on | Read | Why |
+| --- | --- | --- |
+| Finding the package or component that owns current behavior | [Internal Overview](internal/overview.md) | It is the implemented component inventory and routes to focused internals. |
+| Application shape, package boundaries, contracts, dependency direction, runtime guarantees, or safety properties | [Architecture](policy/architecture.md) and relevant [ADRs](adr/) | Architecture defines the intended system and its invariants; ADRs preserve significant decision rationale. |
+| Any documentation addition or revision | [Documentation Policy](policy/documentation.md) | It defines canonical homes, audiences, current-behavior rules, and maintenance requirements. |
+| Pipeline resolution or execution | [Pipeline Internals](internal/pipeline.md) | It documents profiles, references, validation, retries, checkpoints, and runner behavior. |
+| Production modules or validators | [Module Internals](internal/modules.md) | It documents implemented module contracts, capabilities, assets, and registration. |
+| LLM clients, prompts, schemas, profiles, or scheduling | [LLM Runtime](internal/llm.md) | It documents the transport boundary and Scriptorium integration. |
+| Diagnostics, workspace state, resume, or debug artifacts | [Diagnostics Internals](internal/diagnostics.md), [Operations](operations.md), and [Configuration](config.md) | These separate implementation details, operator behavior, and configuration contracts. |
+| CLI or user-visible configuration behavior | [CLI Reference](cli.md) and [Configuration](config.md) | These are the canonical user and operator references. |
+| External input formats, artifact schemas, or durable output files | [Integration Contracts](integrations/) | Integration documents define external and durable data contracts. |
+| Proposed or unimplemented behavior | [Roadmap](roadmap/) | Future work belongs only in roadmap documentation until implemented. |
+
+For an existing subsystem, also inspect its focused tests and the package-local
+types and contracts before changing behavior.
+
+## Validation
+
+Use focused package tests while iterating. Run the repository-wide checks when
+a change affects shared contracts, application behavior, or maintained
+documentation examples:
+
+```sh
+go test ./...
+go vet ./...
+go build ./cmd/notarius
+```

docs/integrations/dnd-spell-artifacts.md

@@ -1,126 +1,69 @@
-# D&D Spell-Cast Artifacts
+# D&D Spell Artifact
 
-This document is the durable artifact contract for approved
-`dnd.spell_cast` artifacts produced by the implemented `dnd/spells` extractor.
+This document is the durable serialized artifact contract for the production
+D&D spell extractor. Selectable extractor keys are cataloged in
+[Configuration](../config.md#implemented-production-modules).
 
-## Artifact Identity
+## Identity
 
-- Extractor key: `dnd/spells`
-- Artifact type: `dnd.spell_cast`
-- Schema version: `v1`
+- Artifact kind: `dnd/spell-list`
 - Prompt ID: `dnd.spells`
 - Response schema key: `dnd_spells`
 - Response schema ID: `notarius.dnd.spells`
 - Response schema name: `notarius_dnd_spells_v1`
+- Response schema version: `v1`
+- Media type: `application/json`
 
-The extractor requires source chunks and transcript source capability. It
-returns generic artifact candidates that are serialized by the JSON output
-module.
+The durable JSON Schema is owned by the D&D spell artifact codec. The
+extractor's private LLM response schema is a separate transport contract: its
+source-reference objects omit `source_id`, which the extractor assigns while
+mapping the response to the canonical artifact. The LLM DTO and transport
+schema are not part of this durable contract.
 
-## Artifact Envelope
+The output contains canonical spell casts derived from transcript evidence.
+Source IDs are assigned from the input identity; source-unit ranges identify
+the evidence location.
 
-Approved artifacts use the generic artifact envelope documented in
-[JSON Output](json-output.md#artifact-files):
+## Output Shape
 
-```json
-{
-  "extractor_key": "dnd/spells",
-  "artifact_type": "dnd.spell_cast",
-  "schema_version": "v1",
-  "payload": {
-    "caster": "Aria",
-    "spell": "Cure Wounds",
-    "effect": "heals an injured ally",
-    "narrative_description": "Aria raises her holy symbol and casts Cure Wounds."
-  },
-  "source_refs": [
-    {
-      "source_id": "session-alpha",
-      "start_unit_id": "seg-001",
-      "end_unit_id": "seg-001"
-    }
-  ]
-}
+The extractor payload is a JSON object with one required top-level array. Its
+structure is:
+
+```text
+{"spell_casts": [<spell-cast object>, ...]}
 ```
 
-## Payload Fields
+`spell_casts` must be present. It may be empty when no spell casts are found.
+When multiple chunk results are combined, spell casts remain in chunk order.
+When the payload is written as durable output, its logical path is derived from
+the configured artifact lane ID as defined by the
+[JSON output contract](json-output.md#output-payload-files).
 
-The `payload` object contains:
+## Spell-Cast Fields
+
+Each spell cast contains exactly these required fields:
 
 - `caster`: in-world character or creature casting the spell;
 - `spell`: spell name;
 - `effect`: concise spell effect in the scene;
-- `narrative_description`: short description of the spell cast in context.
+- `narrative_description`: short description of the spell cast in context;
+- `source_refs`: transcript source references with extractor-assigned source
+  IDs and evidence unit ranges. It must contain at least one entry.
 
-All payload fields are strings and must be non-empty after trimming.
-
-`caster` is the in-world caster, not the transcript speaker.
+All four string fields must be non-empty. `caster` is the in-world caster, not
+the transcript speaker. Unknown fields are rejected.
 
 ## Source References
 
-Source references live on the artifact envelope as `source_refs`; they are not
-duplicated inside the `payload`.
+Each source reference contains exactly three required fields: `source_id`,
+`start_unit_id`, and `end_unit_id`. The source ID must match the input identity.
+The unit IDs must be positive integers present in the input, and the start unit
+must not appear after the end unit. Unknown fields are rejected.
 
-Each source reference uses the generic source-reference shape:
-
-- `source_id`
-- `start_unit_id`
-- `end_unit_id`
-
-Validation requires:
-
-- at least one source reference;
-- non-empty source ID and unit IDs;
-- source ID matching the source document ID;
-- start and end unit IDs existing in the source document;
-- start unit appearing before or at the same position as end unit.
-
-## Structured LLM Response Shape
-
-The extractor asks the LLM for this top-level response shape:
-
-```json
-{
-  "spell_casts": [
-    {
-      "caster": "Aria",
-      "spell": "Cure Wounds",
-      "effect": "heals an injured ally",
-      "narrative_description": "Aria raises her holy symbol and casts Cure Wounds.",
-      "source_refs": [
-        {
-          "source_id": "session-alpha",
-          "start_unit_id": "seg-001",
-          "end_unit_id": "seg-001"
-        }
-      ]
-    }
-  ]
-}
-```
-
-`spell_casts` must be present. It may be empty when no spell casts are found.
-
-The response schema asset is embedded at
-`internal/modules/extract/dnd/spells/assets/schemas/dnd_spells.v1.json`.
-
-## Validators
-
-The extractor supplies two deterministic validators by default:
-
-- `dnd/spells/shape`
-- `dnd/spells/source_refs`
-
-Rejection reason codes:
-
-- `invalid_payload`: payload JSON cannot be decoded as a spell-cast payload.
-- `missing_required_field`: `caster`, `spell`, `effect`, or
-  `narrative_description` is blank.
-- `missing_source_ref`: candidate has no source references.
-- `invalid_source_ref`: at least one source reference fails generic source
-  reference validation.
-
-Rejected candidates are written to `rejected.json` by the JSON output module.
+Reference slot keys and accepted file types are defined in
+[Configuration](../config.md#implemented-production-modules). References are
+supporting disambiguation material, not source evidence, and are not
+addressable through `source_refs`.
 
 ## Manifest Metadata
 
@@ -145,8 +88,3 @@ manifest metadata:
 ```
 
 Raw prompt and schema content are not included in manifest metadata.
-
-## Compatibility Limit
-
-This contract covers only `dnd.spell_cast` artifacts produced by the
-implemented spell-cast extractor.

docs/integrations/json-output.md

@@ -1,30 +1,26 @@
 # JSON Output
 
 This document is the durable JSON output file-format contract produced by the
-implemented `json` output module and written by the CLI.
+production JSON encoder and written by the CLI. Selectable output-encoder keys
+are cataloged in
+[Configuration](../config.md#implemented-production-modules).
 
-## Output Directory
-
-The CLI writes logical output files under:
-
-```text
-<output-root>/<run-id>/
-```
-
-The default output root is `./notarius-output`. Operational behavior is covered
-in [Operations](../operations.md).
+The output module produces the logical bundle described here. The CLI's
+physical placement and lifecycle for that bundle are defined in
+[Operations](../operations.md#output-directory).
 
 ## Files
 
-The `json` output module writes:
+The encoder writes:
 
 - `index.json`
 - `manifest.json`
-- `artifacts/<artifact-type>.json`, one file per approved artifact type
+- `lanes/<lane-id>.json`, one file per normalized serialized artifact
 - `rejected.json`
 - `warnings.json`
 
-Files are pretty-printed JSON with a trailing newline.
+Files are pretty-printed JSON with a trailing newline when the payload is JSON.
+Logical file paths are relative, slash-separated, and may not contain `..`.
 
 ## `index.json`
 
@@ -33,10 +29,15 @@ Shape:
 ```json
 {
   "manifest_file": "manifest.json",
-  "artifact_files": [
+  "output_files": [
     {
-      "artifact_type": "dnd.spell_cast",
-      "file": "artifacts/dnd.spell_cast.json"
+      "lane_id": "spells",
+      "media_type": "application/json",
+      "file": "lanes/spells.json",
+      "module_key": "noop",
+      "schema_id": "notarius.dnd.spells",
+      "schema_name": "notarius_dnd_spells_v1",
+      "schema_version": "v1"
     }
   ],
   "rejected_file": "rejected.json",
@@ -44,25 +45,30 @@ Shape:
 }
 ```
 
-`artifact_files` is sorted by artifact type. It is empty when no artifacts are
-approved.
+`output_files` is sorted by lane ID. Output file names are produced by
+sanitizing the lane ID:
+
+- characters outside `A-Z`, `a-z`, `0-9`, `.`, `_`, and `-` become `_`;
+- repeated `..` sequences are replaced;
+- leading and trailing `.`, `_`, and `-` are trimmed;
+- empty sanitized names are rejected;
+- two lanes that sanitize to the same output file are rejected.
+
+`manifest_file`, `rejected_file`, and `warnings_file` contain the fixed paths
+shown above. Each `output_files` entry requires `lane_id` and `file`. It also
+contains the normalized payload `media_type`, normalizer `module_key`, and
+response `schema_id`, `schema_name`, and `schema_version` when those values are
+available.
 
 ## `manifest.json`
 
-`manifest.json` contains a run manifest:
+`manifest.json` contains a run manifest. This abridged example shows its core
+structure:
 
 ```json
 {
   "run_id": "run-123",
   "pipeline_id": "dnd-session",
-  "pipeline_digest": "sha256:...",
-  "input_module": "seriatim",
-  "chunker": "generic",
-  "source_digests": ["sha256:..."],
-  "extractors": ["dnd/spells"],
-  "merger": "appendorder",
-  "normalizer": "noop",
-  "output_encoder": "json",
   "artifact_lanes": [
     {
       "id": "spells",
@@ -71,13 +77,6 @@ approved.
       "normalizer": "noop"
     }
   ],
-  "llm_profiles": [
-    {
-      "id": "default",
-      "provider": "openai-compatible",
-      "model": "configured-model"
-    }
-  ],
   "validation_status": "approved",
   "started_at": "2026-01-01T00:00:00Z",
   "completed_at": "2026-01-01T00:00:01Z"
@@ -86,52 +85,59 @@ approved.
 
 Fields with empty values may be omitted by JSON encoding.
 
-`validation_status` is `approved` when no candidates were rejected and
-`rejected` when one or more candidates were rejected.
+The manifest fields are:
 
-## Artifact Files
+- `run_id`, `pipeline_id`, and `pipeline_digest`: run and resolved-pipeline
+  identity;
+- `input_module`, `chunker`, `extractors`, `merger`, `normalizer`, and
+  `output_encoder`: resolved module keys;
+- `module_metadata` and `artifact_lanes`: module and per-lane provenance,
+  including prompt and response-schema provenance when provided;
+- `validator_chains`: resolved validation points and validators;
+- `source_digests` and `references`: source and reference provenance;
+- `normalized_outputs` and `rejected_outputs`: payload-free result summaries;
+- `llm_profiles`: selected profile IDs and provider or model names when
+  available;
+- `metadata`: the effective prompt `session_id`;
+- `validation_status`: `approved` or `rejected`;
+- `started_at` and `completed_at`: UTC run timestamps.
 
-Each artifact file has this shape:
+`source_digests` contains source document digests only. Bound references are
+recorded separately under `references`, which contains provenance only: target
+stage, lane ID when present, slot name, origin type and URI, digest, media
+type, byte size, and binding source. Reference content is not written to
+durable output.
 
-```json
-{
-  "artifact_type": "dnd.spell_cast",
-  "artifacts": [
-    {
-      "extractor_key": "dnd/spells",
-      "artifact_type": "dnd.spell_cast",
-      "schema_version": "v1",
-      "payload": {},
-      "source_refs": [
-        {
-          "source_id": "session-alpha",
-          "start_unit_id": "seg-001",
-          "end_unit_id": "seg-001"
-        }
-      ]
-    }
-  ]
-}
-```
+Reference `stage` is `chunk`, `extract`, `merge`, or `normalize`. `lane_id` is
+omitted for chunk references and present for extract, merge, and normalize
+references.
 
-Artifact envelope fields:
+`validation_status` is `approved` when no outputs were rejected and `rejected`
+when one or more outputs were rejected.
 
-- `extractor_key`: extractor module key.
-- `artifact_type`: artifact type.
-- `schema_version`: artifact schema version.
-- `payload`: artifact-type-specific JSON payload.
-- `source_refs`: optional generic source references.
-- `metadata`: optional artifact metadata.
+`validator_chains` records the resolved validator chain for each validation
+point. Entries include stage, lane ID when applicable, module key, and validators
+with key and execution class. Empty chains are recorded with an empty
+`validators` array, including chains resolved from explicit empty config
+overrides.
 
-Artifact file names are produced by sanitizing the artifact type:
+`normalized_outputs` summarizes each normalized lane output without embedding
+payload bytes. Entries include lane ID, normalizer module key, source ID, media
+type, and response schema provenance where available.
 
-- characters outside `A-Z`, `a-z`, `0-9`, `.`, `_`, and `-` become `_`;
-- repeated `..` sequences are replaced;
-- leading and trailing `.`, `_`, and `-` are trimmed;
-- empty sanitized names are rejected.
+`rejected_outputs` summarizes rejected module outputs without embedding raw
+payload bytes. Entries include stage, lane, module, chunk, validator or reason,
+message, attempt count, and optional diagnostic artifact path.
 
-For current D&D spell-cast artifacts, the file is
-`artifacts/dnd.spell_cast.json`.
+## Output Payload Files
+
+Each normalized serialized artifact is written to
+`lanes/<sanitized-lane-id>.json`. The JSON output encoder is domain-neutral and
+accepts only artifacts whose codec media type is `application/json`. The file
+contains the codec-owned JSON bytes pretty-printed.
+
+The schema of each lane payload is owned by that artifact contract. For the
+current D&D spell lane, see [D&D Spell Artifact](dnd-spell-artifacts.md).
 
 ## `rejected.json`
 
@@ -139,25 +145,14 @@ Shape:
 
 ```json
 {
-  "rejected": [
-    {
-      "candidate": {
-        "index": 0,
-        "extractor_key": "dnd/spells",
-        "artifact_type": "dnd.spell_cast",
-        "schema_version": "v1",
-        "payload": {},
-        "source_refs": []
-      },
-      "validator_name": "dnd/spells/source_refs",
-      "reason_code": "missing_source_ref",
-      "message": "spell cast candidate must include at least one source ref"
-    }
-  ]
+  "rejected": []
 }
 ```
 
-`rejected` is an empty array when no candidates are rejected.
+When output validation rejects an output, each entry contains `stage` and
+`message`. It includes `lane_id`, `module_key`, `chunk_id`, `chunk_index`,
+`validator_name`, `reason_code`, `attempt_count`, and
+`diagnostic_artifact_path` when applicable.
 
 ## `warnings.json`
 
@@ -167,26 +162,14 @@ Shape:
 {
   "warnings": [
     {
-      "scope": "output",
-      "reason_code": "example_warning",
-      "message": "warning message"
+      "scope": "extract",
+      "reason_code": "example",
+      "message": "human-readable warning"
     }
   ]
 }
 ```
 
 `warnings` is an empty array when no warnings are reported.
-
-## Path Safety
-
-The output module returns slash-separated logical paths. The CLI also validates
-logical output names before writing:
-
-- names must be non-empty;
-- names must be relative;
-- names must be clean;
-- names must use `/`, not `\`;
-- names must not contain `..`;
-- resolved paths must stay under the run output directory.
-
-Durable writes are atomic per file.
+Each warning requires `reason_code` and `message`; `scope` is omitted when it is
+empty.

docs/integrations/openai-compatible.md

@@ -1,128 +0,0 @@
-# OpenAI-Compatible Structured Output
-
-This document describes the external LLM provider contract implemented by the
-production Notarius LLM client.
-
-## Provider
-
-- Provider key: `openai-compatible`
-- HTTP method: `POST`
-- Endpoint: `<base_url>/chat/completions`
-- Request body: JSON
-- Response mode: chat completions with structured JSON schema output
-
-`base_url` is trimmed of trailing slashes before `/chat/completions` is
-appended. Configure provider settings in [Configuration](../config.md).
-
-## Request
-
-The client sends a JSON object with:
-
-```json
-{
-  "model": "configured-model",
-  "messages": [
-    {
-      "role": "system",
-      "content": "..."
-    },
-    {
-      "role": "user",
-      "content": "..."
-    }
-  ],
-  "response_format": {
-    "type": "json_schema",
-    "json_schema": {
-      "name": "schema_name",
-      "strict": true,
-      "schema": {}
-    }
-  }
-}
-```
-
-Implemented request behavior:
-
-- `model` comes from the structured completion request when set, otherwise from
-  the configured LLM profile.
-- `messages` must be non-empty; each role and content must be non-empty after
-  trimming.
-- `response_format.type` is always `json_schema`.
-- `response_format.json_schema.strict` is always `true`.
-- `response_format.json_schema.name` and `schema` come from the extractor or
-  validator making the call.
-
-If an API key is configured, the client sends:
-
-```text
-Authorization: Bearer <api-key>
-```
-
-The client always sends `Content-Type: application/json`.
-
-## Response
-
-The client expects a JSON response with at least one choice:
-
-```json
-{
-  "model": "provider-model",
-  "choices": [
-    {
-      "message": {
-        "content": "{\"field\":\"value\"}"
-      }
-    }
-  ],
-  "usage": {
-    "prompt_tokens": 10,
-    "completion_tokens": 5,
-    "total_tokens": 15
-  }
-}
-```
-
-`choices[0].message.content` may be either:
-
-- a JSON string whose contents are valid JSON; or
-- raw JSON.
-
-The decoded content is unmarshaled into the caller-provided structured output
-target. If `usage` is present, prompt, completion, and total token counts are
-copied into the completion response.
-
-## Errors And Retries
-
-The client validates base URL, model, response schema name, response schema
-JSON, messages, and output target before or during the call.
-
-Retryable failures:
-
-- HTTP request failure;
-- response body read failure;
-- HTTP `429`;
-- HTTP `5xx`;
-- malformed provider response envelope;
-- missing choices;
-- missing, empty, or invalid assistant JSON content;
-- structured-output decode failure.
-
-Non-retryable provider status codes include non-`429` `4xx` responses.
-
-Provider error bodies are parsed for `error.message` or `message` when present.
-Configured API key values and bearer-token values are redacted from returned
-provider errors.
-
-## Timeouts And Concurrency
-
-The configured profile timeout is applied per provider request when greater
-than zero. Context cancellation is respected.
-
-The production CLI wraps the provider client with the LLM scheduler. Effective
-concurrency is described in [LLM runtime internals](../internal/llm.md).
-
-## Limits
-
-This contract documents only the fields the implemented client sends and reads.
-Provider-specific extensions are ignored unless they affect those fields.

docs/integrations/seriatim.md

@@ -1,116 +1,65 @@
 # Seriatim Transcript JSON
 
-This document is the external input contract for the implemented `seriatim`
-input adapter.
+This document is the external input contract consumed by the production
+Seriatim input adapter. Selectable input-adapter keys are cataloged in
+[Configuration](../config.md#implemented-production-modules).
 
 ## Adapter
 
-- Module key: `seriatim`
-- Document kind: `transcript`
-- Unit kind: `transcript_segment`
 - Source format: `application/vnd.seriatim+json`
 
-The adapter parses raw Seriatim JSON into a generic source document. It owns
-transcript-specific JSON parsing and metadata mapping; core source and pipeline
-code stay source-format agnostic.
-
 ## Accepted Shape
 
 The input must be one JSON object with top-level `metadata` and `segments`
 fields. This covers the maintained minimal fixture and Seriatim intermediate
 output that provides the same required segment fields.
 
-```json
-{
-  "metadata": {
-    "id": "session-alpha",
-    "title": "Synthetic D&D spell session"
-  },
-  "segments": [
-    {
-      "id": "seg-001",
-      "start": 0,
-      "end": 4,
-      "speaker": "Aria",
-      "text": "Aria raises her holy symbol and casts Cure Wounds."
-    }
-  ]
-}
-```
-
 The maintained example is
 [examples/seriatim-minimal-transcript.json](../../examples/seriatim-minimal-transcript.json).
 
-Top-level metadata entries are preserved. Other segment fields, such as
-`categories`, are ignored.
+Required top-level fields:
+
+- `metadata`: an object. Its entries are accepted as source metadata.
+- `segments`: a non-empty array of segment objects.
+
+Required segment fields:
+
+- `id`: a positive integer JSON number or canonical decimal string without
+  leading zeros or surrounding whitespace;
+- `start`: a finite, non-negative JSON number or numeric string;
+- `end`: a finite, non-negative JSON number or numeric string that is not less
+  than `start`;
+- `speaker`: a non-empty string;
+- `text`: a non-empty string.
+
+Other top-level and segment fields, such as `categories`, are ignored.
 
 Multiple top-level JSON values are rejected.
 
 ## Validation
 
-The adapter rejects:
-
-- empty raw input;
-- malformed JSON;
-- top-level JSON that is not an object;
-- missing, null, or non-object `metadata`;
-- missing, null, non-array, or empty `segments`;
-- segment values that are not objects;
-- segment `id` values that are neither strings nor numbers;
-- non-string `speaker` or `text`;
-- empty segment IDs;
-- segment IDs with leading or trailing whitespace;
-- duplicate segment IDs;
-- missing or empty `speaker`;
-- missing, empty, invalid, non-finite, or negative `start`;
-- missing, empty, invalid, non-finite, or negative `end`;
-- `end` values before `start`;
-- missing or empty `text`.
+The adapter rejects empty input, malformed JSON, multiple top-level JSON values,
+non-object segment values, duplicate segment IDs, and any violation of the
+shape or field constraints above.
 
 Segment text is preserved as provided, but it must not be empty after trimming.
 
-## Source Mapping
+## Derived Identity
 
-The adapter maps input to `SourceDocument`:
+Notarius identifies the parsed source in this order:
 
-- `metadata` becomes `SourceDocument.Metadata`;
-- `SourceDocument.Kind` is `transcript`;
-- `SourceDocument.Format` is `application/vnd.seriatim+json`;
-- `SourceDocument.Digest` is `sha256:<hex>` of the exact raw input bytes.
+1. `metadata.id`, when it is a non-empty string after trimming;
+2. `metadata.source_id`, when it is a non-empty string after trimming;
+3. `seriatim:<first-16-hex-chars-of-raw-sha256>`.
 
-`SourceDocument.ID` is selected in this order:
-
-1. the parse request source ID, after trimming;
-2. `metadata.id`, when it is a non-empty string after trimming;
-3. `metadata.source_id`, when it is a non-empty string after trimming;
-4. `seriatim:<first-16-hex-chars-of-raw-sha256>`.
-
-Each segment becomes one `SourceUnit`:
-
-- `segment.id` becomes `SourceUnit.ID`; numeric IDs are converted to their JSON
-  number text, so `1` becomes `"1"`;
-- `segment.text` becomes `SourceUnit.Text`;
-- `SourceUnit.Kind` is `transcript_segment`;
-- `speaker`, `start`, and `end` are stored in source-unit metadata.
-
-## Metadata Keys
-
-Seriatim unit metadata uses these keys:
-
-- `speaker`: string speaker label;
-- `start`: `json.Number` start value;
-- `end`: `json.Number` end value.
-
-The `internal/modules/input/seriatim` package exposes typed accessors for these
-values.
-
-## Capabilities
-
-The module declares these provided capabilities:
-
-- `source.transcript`
-- `transcript.speaker`
-- `transcript.timestamps`
+The exact raw input SHA-256 remains the basis of the fallback source ID. The
+source digest recorded in output provenance is instead the SHA-256 of the
+canonical generic source document, excluding the digest field itself. It covers
+the derived source identity, document kind and format, ordered units and their
+self-references, and accepted metadata. Segment IDs become the unit IDs used by
+artifact source references; each produced unit carries a self-reference whose
+source ID is the derived document ID and whose start and end IDs both equal the
+segment ID.
 
 ## Compatibility Limit
 

docs/internal/diagnostics.md

@@ -1,88 +1,93 @@
 # Diagnostics Internals
 
-Diagnostics internals live in `internal/core/diagnostics`. Operator-facing run
-behavior is documented in [Operations](../operations.md).
-
-## Purpose
-
-Diagnostics provide local inspection artifacts for a run without becoming the
-durable output contract. Durable user output is produced by output modules and
-written by the CLI.
-
-Diagnostics must not expose secrets.
+`internal/core/diagnostics` provides the scoped writer and retention decision
+used by `internal/cli`. The physical layout, artifact inventory, retention
+semantics, failure inspection, and cleanup procedures are canonical in
+[Operations](../operations.md#diagnostics-directory). Configuration fields and
+defaults are canonical in [Configuration](../config.md#diagnostics).
 
 ## Run Directory
 
-`NewRunDirectory(workDir, retention)` creates:
+`NewRunDirectory` normalizes empty constructor inputs, creates the effective
+diagnostics root when needed, and allocates a unique timestamp-based child
+directory. It retries a bounded number of collisions before failing. The
+resulting `RunDirectory` retains its creation time and retention mode for later
+metadata and cleanup decisions.
 
-```text
-<workDir>/run-<unix-nanoseconds>/
-```
+The package does not resolve workspace configuration. `internal/cli` derives
+effective workspace settings first and passes the diagnostics root into the
+constructor.
 
-If `workDir` is empty, it defaults to `/tmp/notarius`. Empty retention defaults
-to `auto`.
+## Scoped Writers
 
-The writer makes the work directory if needed, then attempts to create a unique
-run directory. It retries run ID creation a bounded number of times if a
-collision occurs.
+Typed methods on `RunDirectory` write invocation metadata, redacted effective
+configuration, resolved pipeline/reference data, checkpoint events, source data
+when explicitly requested, manifests, reports, warnings, and error text. The
+current filenames and their operator-facing contents are listed in
+[Operations](../operations.md#diagnostics-directory).
 
-## Artifact Writers
+JSON methods indent their payload and append a newline. All artifact writes use
+a temporary file in the target directory, apply the requested permissions, and
+rename it into place. Artifact resolution accepts only a single relative base
+name; absolute paths, separators, and paths escaping the run directory fail
+before writing.
 
-Implemented artifact names:
+## Redacted Configuration
 
-- `invocation.json`
-- `effective-config.json`
-- `resolved-pipeline.json`
-- `source-document.json`
-- `run-manifest.json`
-- `run-report.json`
-- `warnings.json`
-- `error.log`
+`WriteRedactedEffectiveConfig` accepts a `RedactedDiagnosticsPayload` provider
+rather than a raw config value. `internal/core/config` implements that contract
+by cloning effective config data and removing secret-shaped values before JSON
+encoding. The diagnostics package therefore never needs configuration-specific
+field knowledge.
 
-JSON artifacts are encoded with indentation and a trailing newline. Writes are
-atomic through a temporary file in the target directory followed by rename.
+## Retention Coordination
 
-Artifact names must be single relative file names. Absolute paths, path
-separators, and names resolving outside the run directory are rejected.
+`ShouldRetainRunDirectory` is a pure decision over the effective retention mode,
+run success, and warning presence. `ApplyRetention` uses that result to remove
+only its own run directory. Unsupported modes retain data as a fail-safe, though
+normal CLI execution rejects them during config validation.
 
-## Redacted Effective Config
+The meaning of each supported mode belongs in
+[Operations](../operations.md#retention); this package implements that contract
+without loading config or inspecting run artifacts.
 
-Diagnostics writers accept payloads that implement
-`RedactedDiagnosticsPayload`. `internal/core/config` uses this to redact API
-keys in effective config diagnostics while preserving resolved pipeline context.
+## CLI State Flow
 
-The redaction path clones config data before replacing secret values.
+When diagnostics are enabled, `internal/cli` creates the run directory after
+configuration loading and before pipeline resolution. It then writes artifacts
+as state becomes available: invocation data, effective resolution data,
+pipeline results, and the final report. This ordering permits later failures to
+retain the context already established.
 
-## Retention
+Failures before construction have no `RunDirectory`. Later failures write an
+error log, preserve any available partial manifest, and apply a failed-run
+retention decision. A diagnostics write failure is itself a command failure so
+the CLI does not report success after losing requested inspection data.
 
-Retention is decided by `ShouldRetainRunDirectory`.
+When diagnostics are disabled, the CLI carries a nil run directory and the
+shared `writeDiagnostics` helper turns writes into no-ops. User-facing errors
+still go to stderr; that invocation behavior is documented in
+[Operations](../operations.md#failures).
 
-- Failed runs are always retained.
-- `always` retains successful runs.
-- `never` removes successful runs.
-- `auto` retains successful runs only when warnings exist.
-- Unknown retention values are treated as retain by the retention decision, but
-  config validation rejects unsupported values before normal runs.
+## Package Guarantees
 
-`ApplyRetention` removes only the specific run directory.
+- A `RunDirectory` writes and removes only within its allocated directory.
+- JSON and error artifacts use atomic replacement.
+- Nil receivers and invalid typed payloads return errors rather than panicking.
+- Retention never removes a failed run and never targets the diagnostics root.
+- Diagnostics models contain inspection metadata, not the durable output
+  contract.
+- Checkpoint and debug serializers remain separate framework components.
+- Secret-handling follows the invariant in
+  [Architecture](../policy/architecture.md#state-output-and-safety).
 
-## CLI Failure Behavior
+## Tests To Inspect
 
-The CLI creates the diagnostics run directory after config loading and before
-pipeline resolution. Failures before that point do not have diagnostics.
-
-After diagnostics creation, run failures call `WriteErrorLog` and apply
-retention with `RunSucceeded: false`, so the run directory remains available.
-
-When the pipeline returns a partial manifest on failure, the CLI writes that
-manifest before logging the failure.
-
-## Invariants
-
-- Diagnostics paths must be narrow and run-directory scoped.
-- Writes should be atomic where practical.
-- Secrets must be redacted.
-- Diagnostics write failures are command failures because they can hide the
-  information needed for recovery.
-- Durable output file contracts belong to output modules and integration docs,
-  not to diagnostics.
+- `internal/core/diagnostics/run_dir_test.go`: allocation, artifact confinement,
+  atomic writes, retention, and failure behavior.
+- `internal/core/diagnostics/artifacts_test.go`: stable artifact identifiers.
+- `internal/core/config/redaction_test.go`: clone-and-redact payload behavior.
+- `internal/core/workspace/settings_test.go`: effective diagnostics-root and
+  enablement handoff.
+- `internal/cli/run_test.go`: creation timing, artifact sequencing, disabled
+  diagnostics, overrides, failures, and retention integration.

docs/internal/llm.md

@@ -1,116 +1,148 @@
-# LLM Runtime
+# LLM Runtime Internals
 
-The implemented LLM runtime lives in `internal/framework/llm`. It provides
-transport-neutral structured completion contracts, an OpenAI-compatible HTTP
-adapter, concurrency scheduling, schema registry helpers, retry behavior, and
-secret redaction.
+`internal/framework/llm` implements Notarius's transport boundary for structured
+completion. It contains the Scriptorium adapter, concurrency scheduler,
+prompt/schema registries, selected-profile recording, and provider-error
+redaction.
 
-## Contract
+Provider-neutral ownership rules are defined in
+[Architecture](../policy/architecture.md#llm-boundary). Profile sources,
+credentials, and concurrency settings are defined in
+[Configuration](../config.md).
 
-Modules depend on `contracts.StructuredLLMClient`:
+## Structured Contract
 
-```go
-CompleteStructured(ctx, request, out) (response, error)
-```
+Modules and LLM-backed validators depend on
+`contracts.StructuredLLMClient.CompleteStructured`. A request identifies a
+prompt and optional profile/session, supplies named input materials and
+variables, and provides a caller-owned decoding target. A successful response
+contains the validated raw structured bytes plus non-secret provider, model,
+profile, and token metadata.
 
-The request contains messages, optional model override, response schema name,
-and response schema JSON. The caller supplies a pointer target for decoded
-structured output.
+The caller owns prompt selection, response-schema selection, and interpretation
+of the decoded result. `LLMInputMaterial` keeps source and reference bytes with
+their origin metadata so the adapter can pass named artifacts to Scriptorium
+without exposing Scriptorium types through stage contracts.
 
-Extractors own prompts and schemas. Provider adapters should not contain
-domain-specific prompt logic.
+## Production Construction
 
-## Production Client Construction
+`internal/cli` constructs the production runtime by:
 
-`internal/cli` builds the production LLM client from the effective config:
+1. allocating the asset registry populated by the generic, Seriatim, and D&D
+   package-family registrars;
+2. creating a `ScriptoriumClient` from the effective profile source;
+3. attaching an `LLMProfileRecorder`;
+4. creating a scheduler from the effective concurrency limit;
+5. returning a `ScheduledClient` wrapper;
+6. decorating that shared client before preparation when debug recording is
+   enabled; and
+7. injecting that one shared client into complete pipeline preparation before
+   the source file is read or the runner is invoked.
 
-1. find the effective LLM profile;
-2. build `OpenAICompatibleClientConfig`;
-3. create an OpenAI-compatible client;
-4. create a scheduler from profile or global concurrency;
-5. wrap the client with `NewScheduledClient`;
-6. return non-secret LLM profile manifest metadata.
+The D&D scene chunker and spell extractor retain this injected client and use
+it for every structured completion. Operation requests do not carry an LLM
+client.
 
-The current run command requires exactly one distinct effective LLM profile for
-the resolved pipeline.
+The CLI separately gathers explicit profile IDs from resolved LLM-capable stage
+and validator bindings. It prepares a small internal check prompt for each ID so
+missing or invalid profiles fail before pipeline execution. The runtime profile
+override syntax and scope are defined in the
+[CLI reference](../cli.md#run); binding rules are defined in
+[Configuration](../config.md#module-bindings).
 
-## OpenAI-Compatible Adapter
+## Scriptorium Adapter
 
-`OpenAICompatibleClient` posts JSON to:
+`ScriptoriumClient` converts a Notarius request into a Scriptorium `RunRequest`.
+It validates the decoding target and prompt identity, maps named input materials
+to inline artifacts, forwards explicit profile and session context, delegates
+rendering/provider execution/structured validation, and unmarshals successful
+JSON into the caller target.
 
-```text
-<base_url>/chat/completions
-```
+Empty optional input material is represented by a single space so Scriptorium
+retains the named input. The client returns Scriptorium's validated structured
+bytes rather than re-encoding the caller target, allowing modules to preserve
+the runtime result exactly.
 
-It sends:
+Selected profile, provider, model, and token metadata are mapped into the
+Notarius response. The recorder deduplicates profiles by identity and supplies
+manifest-safe profile summaries after actual calls; manifest population does
+not guess the selected prompt default in advance.
 
-- `model`
-- `messages`
-- `response_format.type = "json_schema"`
-- `response_format.json_schema.name`
-- `response_format.json_schema.strict = true`
-- `response_format.json_schema.schema`
+Generated-output validation failures and provider failures are wrapped with
+prompt context. Error strings pass through bearer-token redaction before they
+cross the runtime boundary.
 
-If an API key is configured, the adapter sends an `Authorization: Bearer ...`
-header.
+## Scheduling
 
-The adapter accepts assistant content either as a JSON string containing JSON or
-as raw JSON content. It then unmarshals that content into the caller-provided
-target.
+`Scheduler` uses a bounded permit count and a FIFO waiter queue. Immediate
+acquisition increments the in-flight count; queued acquisition waits for a
+permit or context cancellation. Cancellation removes a queued waiter, while a
+cancelled waiter that has already received a permit releases it.
 
-External wire-contract details belong in the
-[OpenAI-compatible integration doc](../integrations/openai-compatible.md).
+`ScheduledClient` acquires a permit around each structured completion and
+defers release on every result path. The effective limit and default are
+configuration facts in [Configuration](../config.md#defaults).
 
-## Retries And Timeouts
+This provider-call ceiling is independent of the pipeline's extract worker
+limit. Concurrent lanes, retries, and validators all use the same scheduled
+client, so increasing framework workers cannot exceed `total_llm`. Pipeline
+dispatch and cancellation mechanics are documented in
+[Pipeline Internals](pipeline.md#execution-flow).
 
-The adapter retries:
+## Prompt And Schema Assets
 
-- provider request failures;
-- response read failures;
-- HTTP `429`;
-- HTTP `5xx`;
-- malformed provider envelopes;
-- malformed assistant JSON;
-- structured-output decode failures.
+`AssetRegistry` combines caller-owned prompt filesystems under stable prefixes
+and rejects invalid or conflicting registrations. Production module packages
+register their own prompt and schema assets; generic framework code contains no
+D&D prompt content. `internal/framework/promptfs` provides the domain-neutral
+filesystem composition helper used to combine module-owned files with shared
+domain prompt fragments.
 
-Non-retryable `4xx` responses are returned without retry. Request timeout comes
-from the effective LLM profile. Context cancellation is respected.
+Schema helpers load embedded JSON Schema with identity and digest metadata,
+return defensive copies, and expose a diagnostics map that omits schema bytes.
+The small framework registry contains only generic test schemas; production
+schemas remain package-owned.
 
-## Scheduler
+## Debug And Redaction Boundaries
 
-`Scheduler` bounds concurrent provider calls. It tracks in-flight calls and a
-FIFO queue of waiters. Cancellation removes queued waiters or releases granted
-permits.
+The pipeline may wrap the client with a debug recorder that captures prepared
+prompt/response material for an explicitly enabled debug run. Default
+diagnostics and manifests receive identities, hashes, usage, and selected
+profile summaries rather than prompt, source, reference, schema, or response
+content.
 
-`NewScheduledClient` wraps any structured LLM client and runs each completion
-inside the scheduler.
+The Scriptorium error wrapper removes bearer credential values from surfaced
+provider errors; `RedactSecrets` and `ErrorWithSecretsRedacted` support known
+secret values elsewhere in the runtime. Config diagnostics use a separate
+clone-and-redact path in `internal/core/config`. These mechanisms implement the
+security invariant in
+[Architecture](../policy/architecture.md#state-output-and-safety); operator
+handling of debug data is defined in [Operations](../operations.md#debug).
 
-Effective concurrency is:
+## Failure Behavior
 
-1. `llm_profiles.<id>.max_concurrency`, when greater than zero;
-2. `concurrency.total_llm`, when greater than zero;
-3. `1`.
+- Invalid targets, missing prompt IDs, malformed structured output, and
+  Scriptorium failures return contextual errors to the calling module.
+- Scheduler construction rejects non-positive limits; acquisition respects
+  context cancellation.
+- Asset registration rejects invalid roots, missing content, and path conflicts.
+- Schema loading distinguishes missing assets, invalid JSON, and invalid
+  metadata.
+- Profile validation errors occur during CLI preparation when an explicit
+  selected ID cannot be prepared.
 
-## Schema Registry
+## Tests To Inspect
 
-The framework schema registry embeds generic test schemas. It also exposes
-helpers for caller-owned schemas:
-
-- `LoadResponseSchema`
-- `LookupResponseSchema`
-- `MustLookupResponseSchema`
-- `ResponseSchema.DiagnosticsMap`
-
-`DiagnosticsMap` omits raw schema content and includes metadata such as key,
-ID, version, name, and SHA-256.
-
-The D&D spell extractor owns and loads its own embedded response schema.
-
-## Secret Redaction
-
-Provider errors are passed through `ErrorWithSecretsRedacted` with the API key
-and bearer-token value. Config diagnostics use redacted effective config
-payloads.
-
-Do not add raw provider request bodies, response bodies, API keys, or prompt
-payloads to diagnostics by default.
+- `internal/framework/llm/scriptorium_client_test.go` and
+  `scriptorium_api_test.go`: adapter mapping and local HTTP integration.
+- `internal/framework/llm/scheduler_test.go` and
+  `scheduled_client_test.go`: permits, FIFO behavior, cancellation, and wrapper
+  release.
+- `internal/framework/llm/asset_registry_test.go` and
+  `schema_registry_test.go`: asset composition, validation, and defensive
+  copies.
+- `internal/framework/llm/secrets_test.go`: provider-error redaction.
+- `internal/cli/run_test.go`: profile validation, production client wiring,
+  manifest recording, and debug integration.
+- Module-local `scriptorium_assets_test.go` files: prompt inputs and package
+  asset registration.

docs/internal/modules.md

@@ -1,165 +1,231 @@
-# Modules
+# Module And Validator Internals
 
-Production modules live under `internal/modules`. Each module implements one
-contract from `internal/framework/contracts`, exposes a `ModuleSpec`, and
-registers itself with the matching pipeline registry.
+Production module and validator implementations live under their domain-first
+trees in `internal/modules`.
+The selectable keys, configuration options, reference slots, and default
+validator chain are canonical in the
+[module](../config.md#implemented-production-modules) and
+[validator](../config.md#implemented-production-validators) catalogs in
+Configuration.
 
-The CLI production catalog currently registers only the modules listed here.
+## Extension Pattern
 
-## Contract Pattern
+A stage module package provides a stable key, constructor, contract
+implementation, `ModuleSpec`, `Register`, and focused behavior and registration
+tests. A validator package follows the same pattern with `ValidatorSpec` and the
+validator registry. Package-family registrars compose those leaf registrations
+into the production catalog and own family-level policy such as default
+validator chains and prompt asset collection.
 
-A production module package should provide:
+Production input, chunk, output, and D&D spell-extract packages register strict
+option decoders and run-local builders. Preparation decodes their options into
+implementation-owned values and injects dependencies. The spell extractor is
+typed over the canonical D&D model. D&D validators, merge, and normalize use
+typed variants; JSON representation validators use serialized requests; and
+unconditional validators expose separate chunk and typed variants. The D&D
+production registrar registers only the canonical typed spell implementations.
 
-- a stable module key;
-- a constructor such as `New`;
-- the relevant contract implementation;
-- `ModuleSpec`;
-- `Register`;
-- focused tests for registration, options, contract behavior, and errors.
+Prepared extractors, extract validators, and codecs may be reused concurrently
+by the run-wide extract pool. Production implementations are immutable after
+construction: they retain only typed options, immutable assets, or the shared
+concurrency-safe LLM client. Implementations that introduce mutable state must
+synchronize that state without creating a separate provider scheduler.
 
-Module specs should describe capabilities accurately. Resolution uses specs to
-reject incompatible pipelines before execution.
+Specs expose capability and execution metadata without constructing an
+implementation. Registry entries separately expose option validation and
+run-local construction. Chunk, extract, merge, and normalize modules that accept
+auxiliary material declare identical reference slots from both
+`ReferenceSlots()` and `ModuleSpec().ReferenceSlots`; registration tests enforce
+that agreement. Runtime delivery uses the corresponding stage request's
+`References` field.
 
-## `seriatim` Input
+LLM-backed extensions own their prompt definitions and response schemas under
+package-local embedded assets. Shared filesystem composition belongs in
+`internal/framework/promptfs`; reusable D&D prompt fragments, reference
+declarations, prompt-input assembly, and source-unit helpers belong in
+`internal/modules/dnd/shared`. Stage contracts expose only Notarius structured-
+completion types, not Scriptorium public types.
 
-Package: `internal/modules/input/seriatim`
+Reference material may inform a module or prompt but must not become source
+evidence. The resolver and materializer behavior is described in
+[Pipeline Internals](pipeline.md#reference-materialization).
 
-The `seriatim` adapter parses Seriatim transcript JSON into a generic source
-document. It owns transcript JSON details, source ID selection, source digest
-creation, transcript segment validation, and segment metadata mapping.
+## Input Adapter
 
-Provides:
+### `internal/modules/seriatim/input/transcript`
 
-- `source.transcript`
-- `transcript.speaker`
-- `transcript.timestamps`
+The adapter decodes the supported transcript JSON, selects the source identity,
+computes canonical source provenance, validates segments, and maps each segment
+into a generic source unit with a self-reference plus speaker and timestamp
+metadata. It accepts no module options. Its spec advertises the transcript
+capabilities consumed by D&D modules.
 
-External JSON shape belongs in the Seriatim integration doc.
+Parsing is strict about required values and duplicate unit IDs but deliberately
+ignores unrelated Seriatim fields. The external format and derived-identity
+rules are defined in the
+[Seriatim contract](../integrations/seriatim.md).
 
-## `generic` Chunker
+## Chunkers
 
-Package: `internal/modules/chunk/generic`
+### `internal/modules/generic/chunk/units`
 
-The `generic` chunker splits source units into ordered chunks. It validates the
-source document, clones source units, assigns chunk IDs such as `chunk-000001`,
-and records chunk metadata for start unit, end unit, and unit count.
+The generic chunker validates the source document, walks units in configured
+windows, clones each selected unit, and emits deterministic ordered chunk IDs.
+Overlap changes the next window start but never reorders units. It records the
+first and last unit and unit count in chunk metadata, and derives the chunk's
+canonical source reference from those unit references.
 
-Options:
+The accepted options and defaults are defined in
+[Configuration](../config.md#implemented-production-modules). Generic
+framework validation canonicalizes the returned unit slices before extraction.
+The chunker decodes its options during construction and retains only the typed
+window settings used by `Chunk`.
 
-- `max_units`: positive integer, default `50`;
-- `overlap_units`: non-negative integer, default `0`, and less than
-  `max_units`.
+### `internal/modules/dnd/chunk/scenes`
 
-Provides:
+The scene chunker prepares a structured Scriptorium request from the full
+transcript, session, and optional D&D reference inputs. It validates the model's
+scene boundaries against source-unit IDs and converts them into deterministic
+chunks with canonical source references spanning each scene's units.
+Preparation injects the shared structured LLM client into the chunker; `Chunk`
+supplies only the run-specific profile, session, source, references, and
+metadata.
 
-- `chunks`
+Scene validation requires sequential, contiguous, non-overlapping coverage from
+the first source unit through the last. Each chunk contains JSON scene content
+and module-owned metadata for the scene description, boundaries, confidence,
+participants, and unit count. Boundary caveats become warnings. Malformed
+structured output is returned as an error; there is no fallback chunker.
 
-## `dnd/spells` Extractor
+The package embeds its prompt and response schema and reports their non-secret
+identity and hashes through singleton module metadata. Shared D&D assets supply
+reference declarations and prompt inputs; their user-facing keys and accepted
+file types remain canonical in [Configuration](../config.md).
 
-Package: `internal/modules/extract/dnd/spells`
+## Extractor
 
-The `dnd/spells` extractor owns D&D spell-cast artifact semantics. It renders
-embedded prompts, loads the embedded structured response schema, calls the
-structured LLM client, converts spell-cast responses into artifact candidates,
-and supplies deterministic validators.
+### `internal/modules/dnd/extract/spells`
 
-Requires:
+The spell extractor prepares a structured request from one chunk, the
+chunk-scoped source input, the session, and optional D&D reference inputs. It
+decodes the model response, assigns the generic source identity to every source
+reference, canonicalizes duplicate references, orders spell casts by their
+earliest cited unit, and returns `dnd.SpellList`.
 
-- `chunks`
-- `source.transcript`
+The extractor owns its private model-response DTO, embedded prompt, LLM response
+schema, strict option decoder, injected shared LLM client, and prompt/schema
+manifest metadata. The separate `internal/modules/dnd/codec/spells` package
+owns the durable schema and stable JSON representation for artifact kind
+`dnd/spell-list`. The runner keeps the result typed through validators and later
+stages, using the codec only for checkpoint, debug, and output boundaries.
+Shared D&D helpers keep prompt input
+names and source-unit reference conversion consistent with the scene chunker.
 
-Provides:
-
-- `dnd.spell_casts`
-
-Artifact type and schema version:
-
-- artifact type: `dnd.spell_cast`
-- schema version: `v1`
-
-The extractor adds prompt and response-schema provenance to lane manifest
-metadata. Durable artifact payload details belong in the
+The durable payload and manifest metadata shapes are defined in the
 [D&D spell artifact contract](../integrations/dnd-spell-artifacts.md).
 
+## Merger And Normalizer
+
+### `internal/modules/generic/merge/appendorder`
+
+The merger passes typed values to an injected combine function in framework
+source-chunk order. The D&D registrar specializes it with a spell-list append
+function.
+
+### `internal/modules/generic/normalize/noop`
+
+The normalizer returns the merged domain value unchanged and is reusable for
+any registered artifact type.
+
+## Output Encoder
+
+### `internal/modules/generic/output/json`
+
+The JSON encoder sorts normalized results by lane, derives collision-checked
+safe logical names, pretty-prints JSON payloads, and assembles the logical index,
+manifest, rejected-result, warning, and lane files. Invalid JSON, unsupported
+media types, unsafe names, and sanitized-name collisions are errors.
+
+The encoder returns logical files only. The CLI places them on disk, and the
+[JSON output contract](../integrations/json-output.md) defines their external
+paths and schemas.
+
+## Generic Validators
+
+The generic validator implementations live under
+`internal/modules/generic/validate`.
+
+The unconditional accept and reject validators provide explicit chunk and
+typed-artifact variants used primarily for controlled composition and tests.
+
+The serialized JSON syntax validator uses `encoding/json` to reject malformed
+representation bytes. The serialized JSON Schema validator requires schema
+bytes, parses the instance and schema with `jsonschema`, and distinguishes
+payload rejection from schema loading or compilation errors. The framework
+serialized-validation request carries either canonical chunk bytes or artifact
+codec bytes according to its target context. Neither validator calls the LLM.
+
 ## D&D Spell Validators
 
-The spell extractor returns two built-in validators:
+All three validators receive `dnd.SpellList` directly. The shape validator
+rejects missing or empty spell fields and empty reference lists. The
+source-reference validator applies generic source-reference validation to every
+cited range. The relatedness validator warns when a case-insensitive spell name
+is absent from all cited source text.
 
-- `dnd/spells/shape`: rejects malformed payloads and missing required fields.
-- `dnd/spells/source_refs`: rejects candidates without valid source references.
-
-Reason codes include:
-
-- `invalid_payload`
-- `missing_required_field`
-- `missing_source_ref`
-- `invalid_source_ref`
-
-These validators are supplied by the extractor when no validators are configured
-for the lane.
-
-## `appendorder` Merger
-
-Package: `internal/modules/merge/appendorder`
-
-The `appendorder` merger clones and appends candidates in chunk order. It does
-not deduplicate or reconcile candidates.
-
-Provides:
-
-- `merged`
-
-## `noop` Normalizer
-
-Package: `internal/modules/normalize/noop`
-
-The `noop` normalizer clones merged candidates and returns them unchanged.
-
-Requires:
-
-- `merged`
-
-Provides:
-
-- `normalized`
-
-## `json` Output
-
-Package: `internal/modules/output/json`
-
-The `json` output encoder converts approved artifacts, rejected artifacts,
-warnings, and the run manifest into logical JSON output files. It groups
-approved artifacts by artifact type and sanitizes artifact-type file names.
-
-Requires:
-
-- `normalized`
-
-Provides:
-
-- `encoded`
-
-Durable output file shapes belong in the
-[JSON output contract](../integrations/json-output.md). Operator behavior
-belongs in [Operations](../operations.md).
+These validators are deterministic. Their selectable keys and production order
+are defined in
+[Configuration](../config.md#implemented-production-validators); their durable
+payload rules are defined in the
+[artifact contract](../integrations/dnd-spell-artifacts.md).
 
 ## Production Registration
 
-Production registration is centralized in `internal/cli/catalog.go`.
+The CLI allocates one complete framework registry set and one LLM asset
+registry. It invokes `internal/modules/generic/register`,
+`internal/modules/seriatim/register`, and `internal/modules/dnd/register` in
+that order, then exposes the matching catalog for resolution. The generic and
+Seriatim registrars own their production leaf registrations. The D&D registrar
+owns D&D leaf registrations, the spell default-validator chain, and D&D
+prompt/schema asset collection.
 
-Do not make framework code import production modules. The CLI wires production
-modules at the application boundary; tests may provide fake registries or fake
-catalogs directly.
+Concrete implementation packages do not import generic implementation
+packages directly. A concrete family's `register` package is its composition
+point for specializing reusable generic implementations, while the generic
+registrar composes only generic children.
 
-## Adding A Module
+Framework packages must not import production extensions. Tests may compose
+registries and catalogs directly with fakes.
 
-When adding a module, keep source-format and extraction-domain boundaries clear:
+## Adding An Extension
 
-- input modules may know external source formats;
-- extract modules may know artifact semantics and prompt/schema assets;
-- merge and normalize modules own candidate combination and reconciliation;
-- output modules own serialization, not diagnostics or CLI reporting.
+When adding a production module or validator:
 
-Update [Development](../policy/development.md), [Configuration](../config.md),
-internal docs, integration docs, and examples when the new module becomes
-implemented production behavior.
+1. implement the stage or validator contract and package-local key;
+2. expose and test its spec, constructor, and registration function;
+3. keep format or domain parsing inside the concrete package;
+4. add package-owned prompt/schema assets when the extension is LLM-backed;
+5. register it through its package-family registrar and add a default chain
+   there only when production policy requires one;
+6. add resolution and composition coverage for capabilities, options,
+   references, and validation behavior;
+7. update the selectable-key catalog in [Configuration](../config.md), the
+   relevant external contract, this inventory, and maintained examples when
+   user-visible behavior changes.
+
+Do not add the extension to `docs/development.md`; that file routes by task and
+does not inventory implementations.
+
+## Tests To Inspect
+
+- Package-local `*_test.go` files under the module or validator being changed.
+- `internal/framework/pipeline/typed_resolution_test.go`: typed registry, spec,
+  and heterogeneous artifact composition.
+- `internal/framework/pipeline/default_modules_test.go`: framework binding
+  defaults.
+- `internal/cli/run_test.go`: production catalog, config resolution, and
+  end-to-end CLI composition.
+- `internal/framework/promptfs/*_test.go` and
+  `internal/modules/dnd/shared/*_test.go`: shared prompt and reference assembly.
+- `internal/modules/integration/*_test.go`: black-box composition across
+  production extension domains.

docs/internal/overview.md

@@ -1,86 +1,141 @@
 # Internal Overview
 
-This directory documents implemented Notarius internals for developers and LLM
-coding agents. It complements [Architecture](../policy/architecture.md), which
-is the durable policy for boundaries and invariants.
+This document inventories the implemented Notarius components. Normative
+boundaries and dependency direction belong in
+[Architecture](../policy/architecture.md); external behavior belongs in the
+[CLI](../cli.md), [Configuration](../config.md),
+[Operations](../operations.md), and [integration contracts](../integrations/).
 
-## Executable And CLI
+## Execution Path
 
-`cmd/notarius` calls the CLI package. `internal/cli` owns:
+`cmd/notarius` delegates to `internal/cli`, the production composition root.
+The CLI loads configuration, builds the production catalogs and runtime
+collaborators, invokes `internal/framework/pipeline`, and places the logical
+output files returned by the runner. Diagnostics, checkpoints, and debug
+recorders are optional side-channel collaborators supplied at this boundary.
 
-- command parsing and usage;
-- config discovery and loading;
-- production module catalog and registry wiring;
-- production LLM client construction;
-- run directory creation;
-- durable output writes;
-- user-facing stdout, stderr, and exit codes.
+Resolution produces a fixed ordered workflow and a sorted set of artifact
+lanes. Preparation constructs the complete module and validator set before the
+runner receives source bytes. Source parsing and chunking are serial; extraction
+uses a bounded run-wide worker pool, followed by serial per-lane merge and
+normalize continuations that may overlap across lanes.
 
-The CLI should stay thin around framework contracts. Domain extraction behavior
-belongs in modules, not in command handlers.
+## Application Boundary
+
+| Package | Implemented responsibility |
+| --- | --- |
+| `cmd/notarius` | Executable entry point and process exit delegation. |
+| `internal/cli` | Command parsing, config discovery, package-family registrar invocation, LLM client construction, reference materialization, workspace collaborator setup, durable writes, and user-facing results. |
 
 ## Core Packages
 
-- `internal/core/artifacts`: artifact candidates, approved artifacts, rejected
-  artifacts, validation decisions, and run manifests.
-- `internal/core/config`: defaults, YAML config parsing, environment overrides,
-  validation, redaction, and resolved pipeline config.
-- `internal/core/diagnostics`: per-run diagnostics directory creation,
-  diagnostics artifact writers, atomic writes, and retention decisions.
-- `internal/core/source`: source documents, source units, source references, and
-  validation.
-
-Core packages should remain deterministic and concrete. They should not import
-production modules.
+| Package | Implemented responsibility |
+| --- | --- |
+| `internal/core/artifacts` | Run-manifest and provenance models. |
+| `internal/core/config` | Defaults, YAML parsing, environment overrides, validation, redaction, and effective pipeline resolution. |
+| `internal/core/diagnostics` | Scoped run directories, diagnostics writers, atomic writes, and retention decisions. |
+| `internal/core/source` | Generic source documents, units, chunks, canonical references, lookup, validation, and deterministic source digests. |
+| `internal/core/workspace` | Effective workspace settings, confined paths and writes, checkpoint identity, and checkpoint manifest models. |
 
 ## Framework Packages
 
-- `internal/framework/contracts`: interfaces and request/result structs for
-  input adapters, chunkers, extractors, mergers, normalizers, validators, output
-  encoders, and structured LLM clients.
-- `internal/framework/pipeline`: module registries, module specs, profile
-  resolution, capability checks, run orchestration, warnings, validation, and
-  manifest population.
-- `internal/framework/llm`: OpenAI-compatible structured-output client,
-  scheduler, schema registry, retries, and secret redaction.
-- `internal/framework/prompt`: embedded prompt registry and template rendering.
-- `internal/framework/validate`: validator decision helpers and cardinality
-  enforcement.
+| Package | Implemented responsibility |
+| --- | --- |
+| `internal/framework/contracts` | Source-stage contracts plus artifact identity, schema, serialized representation, codec, validator, reference, output, and structured-completion interfaces and data types. |
+| `internal/framework/pipeline` | Module and artifact-codec registries, option validation, profile resolution, capability checks, reference materialization, complete pipeline preparation, retries, orchestration, warnings, and manifest population. |
+| `internal/framework/validate` | Shared validator decision and cardinality helpers. |
+| `internal/framework/llm` | Scriptorium-backed structured completions, prompt/schema registration, scheduling, profile recording, and secret redaction. |
+| `internal/framework/promptfs` | Builds module prompt filesystems from module-owned and caller-provided shared prompt assets. |
+| `internal/framework/checkpoint` | Workspace-backed checkpoint loading, recording, and payload serialization. |
+| `internal/framework/debug` | Workspace-backed framework and LLM debug recording. |
 
-Framework code should stay source-agnostic and domain-agnostic.
+Framework contracts provide typed artifact, provenance-wrapper, chunk-validator,
+serialized-validator, and
+typed-validator interfaces. The runner owns handoff provenance, validation
+sequencing, rejection handling, checkpoint and debug boundaries, and final
+manifest assembly.
 
-## Module Packages
+Artifact registries support heterogeneous typed extraction entries and
+kind-specific merger, normalizer, and validator variants. Resolution derives a
+lane's kind from its extractor, requires the matching codec, verifies exact Go
+type equality across the lane, and records schema identity in the resolved lane
+and pipeline digest. Registry entries carry separate option-validation and
+run-local construction closures. Preparation injects shared dependencies and
+constructs input, chunk, validators, ordered lanes, and output before source
+parsing. Production modules use strict construction-time option decoding, and
+LLM-backed modules retain the injected shared client. The D&D family registers
+the canonical `dnd/spell-list` codec, typed spell extractor and validators, and
+kind-specific generic merge and normalize strategies; generic JSON validators
+use the serialized-validation contract. The runner executes lanes through
+private exact-type-checked closures, coordinates extract results independently
+of completion timing, and serializes artifacts only through their codec at
+checkpoint, debug, and output boundaries.
 
-Production module packages live under `internal/modules`:
+## Production Extensions
 
-- `input/seriatim`
-- `chunk/generic`
-- `extract/dnd/spells`
-- `merge/appendorder`
-- `normalize/noop`
-- `output/json`
+The canonical catalogs of user-selectable
+[module](../config.md#implemented-production-modules) and
+[validator](../config.md#implemented-production-validators) keys are in
+Configuration. The implemented module packages are:
 
-Each module package owns its contract implementation, module spec,
-registration, options, focused tests, and module-specific errors.
+| Package | Implemented responsibility |
+| --- | --- |
+| `internal/modules/seriatim/input/transcript` | Parses the supported Seriatim transcript format into the generic source model. |
+| `internal/modules/generic/chunk/units` | Splits ordered source units by unit count and overlap. |
+| `internal/modules/dnd/chunk/scenes` | Produces contiguous D&D scene chunks from structured model output. |
+| `internal/modules/dnd` | Owns the canonical D&D spell-list and spell-cast artifact types. |
+| `internal/modules/dnd/codec/spells` | Strictly decodes and stably encodes the durable D&D spell-list representation. |
+| `internal/modules/dnd/extract/spells` | Maps private structured model output to canonical source-grounded D&D spell lists. |
+| `internal/modules/generic/merge/appendorder` | Combines accepted extraction results in chunk order. |
+| `internal/modules/generic/normalize/noop` | Preserves accepted merged output. |
+| `internal/modules/generic/output/json` | Encodes manifests, lane payloads, warnings, and rejections as logical JSON files. |
 
-## Fixtures And Tests
+`internal/modules/dnd/shared` owns reusable D&D prompt fragments,
+reference declarations, prompt input assembly, and source-unit reference
+helpers. Domain-neutral prompt filesystem composition lives in
+`internal/framework/promptfs`.
 
-The repository uses focused package tests plus a fixture-driven CLI workflow.
+Generic validators under `internal/modules/generic/validate` provide
+unconditional test decisions, JSON syntax validation, and JSON Schema
+validation. D&D spell validators under `internal/modules/dnd/validate/spells`
+consume the canonical spell-list type directly to provide shape,
+source-reference, and source-relatedness decisions.
 
-- CLI acceptance tests cover maintained examples under `examples/`.
-- Pipeline tests cover registry composition and end-to-end framework behavior
-  with fakes.
-- Module tests cover implemented module contracts without requiring real
-  provider calls.
-- LLM tests use local test servers and fakes.
+Production composition is grouped behind package-family registrars, and every
+implemented production extension uses its domain-first tree:
 
-Do not use real external services in tests. Use fakes, fixtures, or local test
-servers.
+| Package | Implemented responsibility |
+| --- | --- |
+| `internal/modules/generic/register` | Registers domain-neutral chunk, merge, normalize, output, and validator implementations. |
+| `internal/modules/seriatim/register` | Registers the Seriatim input adapter. |
+| `internal/modules/dnd/register` | Registers D&D modules, validators, default validator policy, and prompt/schema assets. |
 
-## Boundary Reminders
+The CLI allocates the framework registries and asset registry, then invokes
+these registrars in generic, Seriatim, and D&D order.
 
-- Source-format details stay in input modules and integration docs.
-- Extraction-domain details stay in extract modules and artifact docs.
-- Provider wire details stay in the LLM runtime and provider integration docs.
-- Durable output contracts belong in integration docs.
-- Operator procedures belong in `docs/operations.md`, not internal docs.
+Implementation details for all production extensions are in
+[Module Internals](modules.md).
+
+## Run-State Components
+
+| Surface | Implemented owners | Internal purpose |
+| --- | --- | --- |
+| Durable output | Output module, pipeline runner, and CLI writer | Return logical consumer files and place them for a run. |
+| Diagnostics | `internal/core/diagnostics` and `internal/cli` | Record redacted invocation, resolution, result, and failure inspection data. |
+| Checkpoints | `internal/framework/checkpoint` and `internal/core/workspace` | Validate and serialize reusable stage outcomes. |
+| Debug artifacts | `internal/framework/debug` and pipeline instrumentation | Capture sensitive framework-boundary and LLM-call material. |
+
+Physical layout, retention, recovery, and sensitive-data handling are defined
+in [Operations](../operations.md). Concrete stage modules receive recorder
+interfaces and request data, not workspace paths.
+
+## Focused Documentation
+
+- [Pipeline Internals](pipeline.md): resolution, execution, validation, retries,
+  checkpoint/debug hooks, and result assembly.
+- [Module Internals](modules.md): production modules, validators, assets,
+  registration, and the contributor recipe for adding an extension.
+- [LLM Runtime](llm.md): structured completion contracts, Scriptorium adapter,
+  assets, scheduling, profile recording, and redaction.
+- [Diagnostics Internals](diagnostics.md): scoped writers, retention
+  coordination, CLI failure flow, and path safety.

docs/internal/pipeline.md

@@ -1,127 +1,287 @@
 # Pipeline Internals
 
-The implemented pipeline runner lives in `internal/framework/pipeline`. It
-executes the fixed workflow defined by the architecture policy:
+The implemented resolver and runner live in `internal/framework/pipeline`.
+Their fixed workflow and ownership boundaries are defined by
+[Architecture](../policy/architecture.md#system-shape). Configuration fields,
+defaults, and selectable keys are defined in
+[Configuration](../config.md#pipelines).
 
-```text
-input -> chunk -> extract -> merge -> normalize -> output
-```
+Resolution fixes the selected lanes and all stage bindings; preparation
+constructs every selected implementation before the runner begins source work.
+After serial input parsing and chunking, the runner dispatches extract work to
+one bounded run-wide worker pool in chunk-first, lane-second order. Each lane's
+merge and normalize operations remain serial and may overlap other lanes once
+all extracts for that lane are terminal.
 
-Pipeline execution is serial. The runner executes the resolved lanes one after
-another in the fixed workflow order.
+## Resolution
 
-## Profile Resolution
+`internal/core/config.Config.Resolve` validates the loaded configuration,
+selects the named profile, applies the runtime inputs supplied by the CLI, and
+calls `pipeline.ResolvePipeline`.
 
-Config loading produces `pipeline.PipelineProfile` values. Resolution happens
-before execution:
+`ResolvePipeline`:
 
-1. `internal/core/config.Config.Resolve` validates config and finds the named
-   pipeline.
-2. The optional lane selection is passed to `pipeline.ResolvePipeline`.
-3. Module bindings are defaulted:
-   - chunk: `generic`
-   - merge: `appendorder`
-   - normalize: `noop`
-   - output: `json`
-   - LLM profile: `default`
-4. The module catalog is checked for each bound module key.
-5. Module capabilities are checked in workflow order.
-6. A digest is calculated from the resolved pipeline without the digest field.
+1. selects and sorts artifact lanes;
+2. completes omitted bindings using the documented configuration defaults;
+3. looks up each module and validator spec without constructing it;
+4. for a typed extractor, derives its artifact kind, requires the codec, and
+   selects exact-type merger, normalizer, and validator variants;
+5. checks required and provided capabilities in workflow order;
+6. resolves target-aware reference bindings and validator chains;
+7. validates each selected module and validator option set through its registry
+   entry; and
+8. calculates a digest over the resolved structure, including typed artifact
+   kind and schema identity and the effective validator policy in its resolved
+   execution order.
 
-The CLI writes the resolved pipeline and digest to diagnostics.
+Resolution returns a `ResolvedPipeline` containing ordered lanes, concrete
+bindings, validator chains, reference targets, and the digest. It does not read
+reference bytes or construct runtime modules. CLI lane and reference selector
+syntax is defined in the [CLI reference](../cli.md#run).
 
-## Registries And Module Specs
+The digest includes each resolved validator chain's stage, lane, owning module,
+ordered validator bindings, execution classes, targets, and artifact kinds.
+Changing a default chain or an explicit override therefore changes pipeline
+identity whenever it changes the effective validator policy.
 
-`pipeline.Registries` holds concrete constructors for execution. A
-`pipeline.ModuleCatalog` exposes module specs for config validation and
-resolution.
+## Reference Materialization
 
-Every production module registers a `ModuleSpec` with:
+The CLI calls `MaterializeReferences` after resolution and before constructing
+the LLM client or running the pipeline. The materializer checks each binding
+against its resolved target declaration, reads and validates the file, and
+builds both a `contracts.ReferenceSet` and provenance-only metadata on the
+corresponding `ResolvedReferenceTarget`.
 
-- `Key`: module key used in config;
-- `Stage`: module kind such as input, chunk, extract, merge, normalize,
-  validate, or output;
-- `Provides`: capabilities added after that module runs;
-- `Requires`: capabilities that must already be available.
+The runner clones the resulting set into the chunk, extract, merge, or normalize
+request that owns the target. LLM-backed extensions may convert those items into
+named prompt inputs. Reference content remains separate from source evidence and
+source digests.
 
-Capability checks prevent incompatible pipeline composition before a run starts.
+Binding precedence, path resolution, accepted content, and media-type behavior
+are configuration contracts; see [Configuration](../config.md#pipelines).
+Durable provenance is defined in the
+[JSON output contract](../integrations/json-output.md#manifestjson), while
+runtime sensitive-data handling belongs in [Operations](../operations.md).
 
-## Runner Input And Output
+## Registries And Specs
 
-`pipeline.RunInput` carries:
+`pipeline.Registries` holds option validators and run-local builders used during
+resolution and preparation.
+`pipeline.ModuleCatalog` exposes their specs during configuration validation and
+resolution. Separate registries exist for every stage and for validators;
+`ValidatorChainRegistry` stores production default-chain mappings. Both
+containers also carry an `ArtifactCodecRegistry`. Generic registration records
+one codec per stable artifact kind, validates its schema metadata and JSON
+Schema, retains the exact schema digest and Go type, and safely encodes or
+decodes framework-erased values with typed errors on incompatibility.
 
-- a `ResolvedPipeline`;
-- optional source ID, input path, and raw input bytes;
-- a structured LLM client;
-- run ID, start time, LLM profile manifest metadata, and CLI metadata.
+Typed extractor entries are keyed by module key and declare one artifact kind.
+Merger, normalizer, and typed-validator variants are keyed by module or
+validator key plus artifact kind. Chunk and serialized validators occupy
+separate target namespaces; serialized registrations declare whether they
+support chunks, artifacts, or both. Duplicate variants and exact Go-type
+mismatches are rejected deterministically.
 
-`pipeline.RunOutput` carries:
+Lane-sensitive merger and normalizer spec discovery always supplies the
+extractor's artifact kind, so variants under one reusable key may declare
+different capabilities and reference slots. Kind-neutral registry inspection
+selects the first registered artifact kind in sorted order.
 
-- run manifest;
-- approved artifacts;
-- rejected artifacts;
-- warnings;
-- logical output files returned by the output encoder.
+Production composition registers the D&D spell-list codec and typed extractor,
+matching typed merge, normalize, and semantic-validator variants, and
+serialized JSON validators. Every artifact lane resolves through the typed
+registries and a matching codec.
 
-The CLI owns durable file writes and diagnostics writes after the runner returns.
+A `ModuleSpec` declares its stage plus required and provided capabilities.
+Chunk, extract, merge, and normalize specs may also declare reference slots.
+Registry implementations defensively copy spec metadata, reject duplicate keys,
+and verify that a constructed implementation reports the registered key.
+Builder registrations accept `ModuleDependencies` and cloned configuration
+options through one `BuildRequest`. Builders decode those options and retain
+typed values or injected dependencies in the constructed implementation.
+Extractors declare their artifact kind, and merger, normalizer, and validator
+resolution selects the matching typed variant.
 
-## Execution
+A `ValidatorSpec` declares a validator key and execution class. Resolution uses
+the execution class to reject incompatible profile bindings before execution.
+The current production catalog and default chain are listed only in
+[Configuration](../config.md#implemented-production-validators).
+
+## Preparation And Runner Boundary
+
+`pipeline.Prepare` receives a resolved pipeline, the registries, and shared
+module dependencies. It constructs input; chunk and its validators; each lane's
+extract, merge, and normalize modules and validator chains in resolved order;
+then output. It stops at the first error with pipeline, stage, lane, module, and
+validator context as applicable. It never invokes an operation method.
+
+`PreparedPipeline` keeps private constructed executors and exposes cloned
+resolved input, chunk, lane, and output identities. `pipeline.RunInput` carries
+that prepared pipeline, raw source input, run identity and timing, optional
+session and profile metadata, and checkpoint/debug collaborators. The runner
+parses source bytes through the already constructed input adapter. Later stage
+requests receive the generic source model; extract requests receive
+chunk-scoped input material, while chunk, merge, and normalize requests retain
+access to the original source material. Input, chunk, and output operation
+requests do not carry raw module options. The chunk request also does not carry
+an LLM client; an LLM-backed chunker receives the shared client during
+preparation. Their operation requests retain run-specific source, reference,
+profile, session, and metadata context as applicable.
+
+Prepared lanes retain exact-type-checked erased operation closures. The runner
+uses those closures to keep each value typed through extraction, validation,
+merge, and normalization.
+
+Source validation requires every unit to carry a canonical self-reference to
+its containing document and its own unit ID. Explicit clone, checkpoint, and
+debug boundaries retain that reference, and the canonical source digest covers
+it deterministically. Chunks use the same source model and carry one canonical
+reference spanning the first selected unit through the last.
+
+`pipeline.RunOutput` carries the run manifest, accepted normalized serialized
+artifacts with lane and normalizer provenance,
+rejected results, warnings, checkpoint events, and logical files returned by the
+output encoder. The CLI owns diagnostics and durable filesystem writes after the
+runner returns.
+
+## Execution Flow
 
 The runner:
 
-1. validates run input and registries;
-2. builds the input adapter and parses the raw input into a source document;
-3. validates the source document;
-4. builds the chunker and produces source chunks;
-5. runs each selected artifact lane in sorted resolved order;
-6. builds the output encoder and validates logical output file names.
+1. validates its prepared input;
+2. parses the raw input with the prepared adapter and validates the generic
+   source document;
+3. obtains or executes the chunk result;
+4. validates and canonicalizes chunks;
+5. dispatches extract jobs in source-chunk then resolved-lane order, starting a
+   bounded lane continuation when all extracts for that lane are terminal;
+6. invokes the prepared output encoder and validates its logical file results;
+7. returns the assembled manifest, outcomes, warnings, and files.
 
-Within an artifact lane, the runner:
+Within each artifact lane, it reuses the prepared extractor, merger, normalizer,
+and validators while performing these transitions:
 
-1. builds the extractor, merger, and normalizer;
-2. records module manifest metadata when modules provide it;
-3. extracts candidates from each chunk;
-4. normalizes candidate envelope fields such as index, extractor key, artifact
-   type, and schema version;
-5. merges candidates;
-6. normalizes merged candidates;
-7. validates candidate envelope consistency;
-8. runs validators;
-9. converts approved candidates to artifacts.
+1. extract once per accepted chunk and add runner-owned lane, source, and chunk
+   provenance;
+2. validate each extract result and omit rejected results from merge input;
+3. skip the rest of the lane when no extract result is accepted;
+4. merge accepted extract results in their existing order;
+5. validate the merge result and skip normalization on rejection;
+6. normalize the accepted merge result;
+7. validate and append the accepted normalized result.
 
-## Validators
+Module-provided warnings and payload warnings are promoted only from attempts
+whose results are accepted and used.
 
-If a lane declares validators in config, the runner builds those validators from
-the validator registry. Otherwise it uses validators returned by the extractor.
+The extract job channel has the same capacity as the effective extract worker
+count, so dispatch applies backpressure. A fixed continuation executor prevents
+ready or checkpoint-reused lanes from creating one goroutine each. Workers and
+continuations publish lane-local results; the coordinator is the only writer of
+aggregate output and merges those results in resolved lane and source-chunk
+order.
 
-Each validator must return exactly one decision for each eligible candidate. The
-runner enforces decision cardinality with `internal/framework/validate`.
-Rejected candidates are removed before the next validator runs. Approved
-candidates continue through the chain.
+## Chunk Canonicalization
 
-The production CLI currently registers no standalone validator modules. The
-current D&D spell extractor supplies deterministic shape and source-reference
-validators.
+Before lane execution, generic validation requires unique chunk IDs, matching
+source identity, indexes matching returned order, a valid canonical reference,
+non-empty content and media type, and at least one valid source unit per chunk.
+Units may not repeat inside a chunk and must form a contiguous range in
+source-document order. The chunk reference must exactly match the source and
+the first and last unit references.
 
-## Warnings And Failures
+The runner then rebuilds each chunk's unit slice from the source document by
+unit ID. It preserves the canonical reference, content, media type, and cloned
+metadata. The framework permits gaps and overlap between separate
+chunks; stricter coverage policy belongs to the chunk implementation.
 
-Warnings from chunking, extraction, merging, normalization, validation, and
-output encoding are accumulated in `RunOutput.Warnings`.
+## Validation And Retries
 
-Errors wrap the operation and module key or lane context. If execution fails
-after a manifest exists, the returned manifest is marked `failed` and receives a
-completion timestamp.
+Chunk, extract, merge, and normalize results pass through the resolved validator
+chain for their stage and module. Chunk validators receive canonical chunks;
+typed validators receive the domain value; and serialized validators receive
+canonical chunk JSON or artifact codec bytes. Validators execute in resolved
+order and stop at the first error or rejection. An empty chain approves the
+result.
 
-On successful execution, the manifest validation status is:
+`runWithRetry` applies the effective retry policy around module execution and
+its complete validation chain. A module or validator error becomes a framework
+error when attempts are exhausted. A rejection becomes a recorded
+`RejectedOutput` when attempts are exhausted. Cancellation stops retry
+processing immediately.
 
-- `approved` when no candidates were rejected;
-- `rejected` when at least one candidate was rejected.
+Rejected output is a non-fatal pipeline outcome and does not advance. Warnings
+from discarded attempts are not promoted. Configuration owns retry counts and
+validator overrides; see [Module Bindings](../config.md#module-bindings).
 
-## Manifest Population
+## Checkpoint And Debug Hooks
 
-The manifest records run ID, pipeline ID, pipeline digest, module keys, artifact
-lanes, LLM profile metadata, source digest, validation status, and timing.
+The runner depends on recorder and loader interfaces, using no-op
+implementations when collaborators are absent. Each checkpointed workflow
+boundary records a running, succeeded, or failed transition. Reuse decisions
+are consulted in workflow order and accepted payloads are cloned before
+entering the normal handoff path. Typed extract, merge, and normalize
+checkpoints store codec bytes with artifact kind, schema ID and version, exact
+schema digest, and media type. Reuse compares that identity with the prepared
+codec and decodes through the codec; missing identity, mismatches, corrupt
+bytes, and decode failures become explicit reuse misses and execute the step
+normally. Dependency fingerprints and debug content digests use the same stable
+codec bytes that cross those boundaries.
 
-Modules can add non-secret manifest metadata by implementing
-`contracts.ManifestMetadataProvider`. The D&D spell extractor uses this for
-prompt and response-schema provenance.
+Debug instrumentation wraps run, stage, attempt, validator, and structured LLM
+boundaries. Every executed module retry has an attempt envelope containing its
+candidate, accepted-attempt warnings, rejection or error, and only the LLM
+calls made by that module attempt. Validator attempts retain independent scopes
+under `validate/`. Debug-write failures are framework errors; debug data is
+never used as a checkpoint source. Typed artifact debug envelopes are
+domain-neutral, redact sensitive metadata and bytes through the common debug
+policy, and record codec identity plus schema and content digests.
+
+Checkpoint identity, physical layout, reuse behavior, and debug artifact
+handling are operator contracts in [Operations](../operations.md). Serialization
+and recorder implementation are inventoried in
+[Internal Overview](overview.md#run-state-components).
+
+## Results And Failures
+
+The runner owns manifest assembly and handoff summaries but not the durable JSON
+schema. It records resolved module and lane provenance, validator chains,
+source/reference identities, selected LLM profiles, normalized and rejected
+summaries, status, and timing. Serialized artifact content remains outside the manifest.
+Module metadata providers may add non-secret singleton or lane-scoped metadata.
+
+Execution errors include stage, module, lane, or validator context. Once a
+manifest exists, a failing run returns it with failed status and completion
+time. Successful status reflects whether any result was rejected. The
+durable manifest and logical file schemas are defined in the
+[JSON output contract](../integrations/json-output.md).
+
+On a framework failure, the runner cancels its derived context, stops submitting
+new extract work, drains started tasks, and skips the output encoder. Parent
+cancellation takes precedence. Otherwise context-cancellation fallout is
+discarded when a substantive error exists, and the primary error is selected by
+stage, resolved lane, and source chunk rather than completion time.
+
+## Tests To Inspect
+
+- `internal/core/config/effective_config_test.go`: config-to-resolution boundary.
+- `internal/framework/pipeline/profile_test.go`: selection, defaults,
+  capabilities, validator chains, and digest behavior.
+- `internal/framework/pipeline/artifact_codec_registry_test.go`: typed codec
+  metadata, registration, erasure safety, strict decoding, and cloning.
+- `internal/framework/pipeline/typed_resolution_test.go`: heterogeneous typed
+  lane resolution and preparation, target-specific validators,
+  incompatibilities, ordering, and schema-sensitive pipeline identity.
+- `internal/framework/pipeline/runner_concurrency_test.go`: bounded dispatch and
+  continuations, reverse completion, stable errors, rejection, cancellation,
+  retries, and independent provider-call limits.
+- `internal/framework/pipeline/preparation_test.go`: option validation,
+  construction order, dependency failures, and the before-source-work boundary.
+- `internal/framework/pipeline/references_test.go`: target resolution and
+  materialization.
+- `internal/cli/run_test.go`: production stage transitions, retries, rejections,
+  warnings, debug hooks, manifests, and end-to-end composition.
+- `internal/modules/integration/*_test.go` and
+  `internal/modules/seriatim/input/transcript/runner_test.go`: typed runner
+  composition across concrete module families.
+- `internal/framework/checkpoint/*_test.go`: checkpoint serialization and reuse
+  collaborators.

docs/operations.md

@@ -4,20 +4,16 @@ This is the canonical reference for operating implemented Notarius runs.
 
 ## Normal Run
 
-A run reads one source file, resolves one configured pipeline, calls the
-configured OpenAI-compatible LLM profile, writes durable JSON output, and writes
-diagnostics for inspection.
+A run reads one source file, resolves one configured pipeline, executes its
+modules, writes durable output, and writes diagnostics when enabled. Start with
+the [README quickstart](../README.md), then use the [CLI reference](cli.md) for
+invocation options.
 
-```sh
-go run ./cmd/notarius run dnd-session \
-  --config examples/dnd-spells.config.yml \
-  --input examples/seriatim-minimal-transcript.json \
-  --output-dir ./notarius-output \
-  --diagnostics-dir /tmp/notarius
-```
-
-The command prints a success line with the pipeline ID, approved and rejected
-artifact counts, and the output path.
+For production, configure an application-owned workspace such as
+`/var/lib/notarius` and ensure the Notarius process can create files below it.
+For local development, prefer an ignored project-local workspace such as
+`./.notarius/workspace`. See [Configuration](config.md#workspace) for workspace
+fields.
 
 ## Output Directory
 
@@ -27,23 +23,10 @@ Durable output is written to:
 <output-root>/<run-id>/
 ```
 
-The default output root is `./notarius-output`. Use `--output-dir` to choose a
-different root.
-
-The `json` output module writes these files:
-
-- `index.json`: file index with paths to the manifest, artifact files,
-  rejected artifacts, and warnings.
-- `manifest.json`: run manifest with resolved pipeline provenance, module keys,
-  validation status, and timing.
-- `artifacts/<artifact-type>.json`: approved artifacts grouped by artifact
-  type. For the current D&D spell extractor, this includes
-  `artifacts/dnd.spell_cast.json` when spell-cast artifacts are approved.
-- `rejected.json`: rejected candidates and validator decisions.
-- `warnings.json`: warnings reported by pipeline modules or the output encoder.
-
-Output writes are atomic per file. Logical output file names must be clean,
-relative, slash-separated paths and must not contain `..`.
+The output root and its invocation-specific override are defined in the
+[CLI reference](cli.md#run). Output writes are atomic per file. The
+[JSON output contract](integrations/json-output.md) defines the logical files,
+paths, schemas, and media types inside each run directory.
 
 ## Diagnostics Directory
 
@@ -53,37 +36,138 @@ Diagnostics are written under:
 <diagnostics-work-dir>/<run-id>/
 ```
 
-The default diagnostics work directory is `/tmp/notarius`. It can be set with
-`diagnostics.work_dir`, `NOTARIUS_WORK_DIR`, or `--diagnostics-dir`.
+When a workspace directory is configured, diagnostics are written under
+`<workspace.directory>/diagnostics/<run-id>/`. An invocation-specific override
+changes only the diagnostics root, not the workspace root. Configuration and
+environment controls are defined in [Configuration](config.md); the override
+flag is defined in the [CLI reference](cli.md#run).
+
+Diagnostics can be disabled through configuration. When disabled, Notarius
+does not create a diagnostics run directory or write diagnostics artifacts;
+concise failures are still printed to stderr.
 
 Implemented diagnostics artifacts:
 
 - `invocation.json`: command metadata such as operation, config path, input
   path, selected lanes, run ID, and pipeline digest when available.
-- `effective-config.json`: resolved config with API keys redacted.
+- `effective-config.json`: resolved config without raw API keys.
 - `resolved-pipeline.json`: resolved module bindings and pipeline digest.
+- `resolved-references.json`: resolved reference provenance, including target
+  stage, lane ID when present, origin, digest, media type, byte size, and
+  binding source, without reference content.
+- `checkpoint-events.json`: checkpoint steps that were reused or executed
+  during an explicit resume invocation.
 - `run-manifest.json`: the same run manifest written to durable output when it
-  is available.
+  is available, including top-level module metadata when present.
 - `warnings.json`: warning list.
 - `run-report.json`: counts, status, output path, diagnostics path, and run ID.
 - `error.log`: failure message, written after diagnostics directory creation
   when a run fails.
 
-`source-document.json` is supported by the diagnostics writer but is not written
-by the current CLI run workflow.
+## Checkpoints
+
+When checkpoint writing is enabled for a configured workspace, runs write
+checkpoints under:
+
+```text
+<workspace.directory>/checkpoints/<pipeline-id>/<input-key>-<source-or-input-digest>/<pipeline-digest>/<identity-digest>/
+```
+
+Each workflow step owns its own manifest and payload files. There is no
+root-level checkpoint summary. Ordinary invocations execute the pipeline
+normally and refresh checkpoints. An explicit resume invocation reuses valid
+checkpoints and executes any missing, invalid, or incompatible step normally.
+Configuration controls checkpoint writing, while the explicit resume option is
+defined in the [Configuration](config.md#workspace) and
+[CLI](cli.md#run) references.
+
+Checkpoints do not include raw prompts, raw reference contents, raw LLM request
+payloads, or debug traces. They can still contain source text, intermediate
+extracted content, rejected outputs, metadata, warnings, and content digests.
+Treat checkpoint directories as sensitive local state.
+
+A checkpoint is reused only when its stored status, dependencies, payloads, and
+digests match the current invocation. Changes to input bytes, the resolved
+pipeline, selected lanes, the runtime LLM profile override, or bound reference
+content invalidate reuse. The resolved pipeline identity includes effective
+default and explicitly overridden validator chains, so adding, removing,
+reordering, or reconfiguring a validator invalidates checkpoints even when the
+pipeline profile itself is unchanged.
+
+Typed artifact checkpoints additionally record codec-owned bytes, artifact
+kind, schema ID and version, exact schema digest, and media type. A missing or
+mismatched codec identity, or bytes the current codec cannot decode, is reported
+as a checkpoint reuse miss. The affected operation executes normally and, when
+checkpoint writing is enabled, replaces the incompatible checkpoint.
+
+Current checkpoint manifests use workspace schema `notarius.workspace.v2`.
+Manifests written with `notarius.workspace.v1` are incompatible because their
+chunk provenance has an older shape. On the first explicit resume after an
+upgrade, each affected checkpoint is treated as a reuse miss and its workflow
+step executes normally. The compatibility check does not migrate or delete the
+v1 files; when checkpoint writing is enabled, normal execution refreshes the
+affected checkpoint files in the current schema.
+
+Runs do not reuse checkpoints unless explicitly requested. Without reuse, the
+workflow executes normally and refreshes checkpoint files when checkpointing is
+enabled.
+
+## Debug
+
+When debug recording is enabled for a configured workspace, runs write debug
+artifacts under:
+
+```text
+<workspace.directory>/debug/<run-id>/
+```
+
+Debug output is per invocation. It is independent of checkpointing and is not
+used for resume. Enabling debug does not write checkpoints, and enabling resume
+checkpointing does not write debug output.
+
+Debug artifacts include inputs and outputs for source, chunk, extract, merge,
+normalize, and output work, structured LLM request and response data, validator
+requests and results, timing, and retry attempt metadata. LLM calls made inside
+a retry or validator attempt
+write `prompt-000N.json`, `response-000N.json`, and
+`response-content-000N.*` files under that attempt directory and are linked from
+the attempt `llm_calls` array. Prompt content is written inline in the prompt
+artifact. The response metadata and body use the paired files described above;
+the body is pretty-printed JSON when possible and raw text otherwise. Merge and
+normalize retries use these stable paths:
+
+```text
+merge/<lane-id>/attempt-<NN>.json
+merge/<lane-id>/attempt-<NN>/prompt-<NNNN>.json
+merge/<lane-id>/attempt-<NN>/response-<NNNN>.json
+merge/<lane-id>/attempt-<NN>/response-content-<NNNN>.<ext>
+
+normalize/<lane-id>/attempt-<NN>.json
+normalize/<lane-id>/attempt-<NN>/prompt-<NNNN>.json
+normalize/<lane-id>/attempt-<NN>/response-<NNNN>.json
+normalize/<lane-id>/attempt-<NN>/response-content-<NNNN>.<ext>
+```
+
+Checkpoint-reused merge and normalize work retains the stage-level input and
+output artifacts but has no retry-attempt artifacts because no module attempt
+executed. Debug artifacts may contain source material, reference material,
+prompt inputs, model outputs, and other sensitive data. Typed artifact
+envelopes include domain-neutral codec identity, redacted metadata and content,
+and digests of the stable codec bytes. API keys are not written, and obvious
+credential-shaped values and sensitive map keys are redacted, but debug
+directories should still be protected as sensitive local state.
 
 ## Retention
 
-Diagnostics retention is configured with `diagnostics.retention`,
-`NOTARIUS_DIAGNOSTICS_RETENTION`, or the default `auto`.
+Diagnostics retention uses the effective mode selected through configuration;
+see [Configuration](config.md#diagnostics) for the fields, environment
+overrides, precedence, and default.
 
 - `auto`: keep failed runs and successful runs with warnings; remove successful
   warning-free runs.
 - `always`: keep every diagnostics run directory.
 - `never`: remove successful run directories; failed runs are still retained.
 
-Unknown retention values are rejected during config validation.
-
 ## Failures
 
 Failures before diagnostics directory creation, such as a missing config file or
@@ -91,21 +175,19 @@ an unusable diagnostics work directory, are printed to stderr and may not have a
 diagnostics run directory.
 
 Failures after diagnostics directory creation are printed to stderr and written
-to `error.log`. Depending on where the failure occurred, diagnostics may also
-include invocation metadata, redacted effective config, resolved pipeline data,
-the run manifest, warnings, and a run report.
+to `error.log`. Depending on where the failure occurred, the directory may also
+contain artifacts written before the failure.
 
 If durable output writing fails after the pipeline completes, diagnostics are
-retained for inspection and may include `run-manifest.json`, `warnings.json`,
-`run-report.json`, and `error.log`.
+retained for inspection.
 
 ## Warnings
 
 A successful run with warnings exits with code `0`, prints a warning count to
 stderr, and writes warnings to durable output and diagnostics when retained.
 
-The run manifest `validation_status` indicates whether final artifacts were
-approved or rejected after validation.
+The [JSON output contract](integrations/json-output.md) defines durable warning
+and validation-status fields.
 
 ## Cleanup
 
@@ -117,16 +199,29 @@ rm -rf /tmp/notarius/run-1234567890
 rm -rf ./notarius-output/run-1234567890
 ```
 
+Workspace checkpoint and debug directories can also be removed when no longer
+needed. Remove exact identity or run directories, for example:
+
+```sh
+rm -rf /var/lib/notarius/checkpoints/dnd-session/seriatim-abcdef123456/7890abcd1234/identityabcd1234
+rm -rf /var/lib/notarius/debug/run-1234567890
+```
+
 Use exact run-directory paths. Avoid broad cleanup commands against parent
 directories unless they are part of your own operational policy.
 
 ## Operational Limits
 
-There is no command to resume a failed run. Re-run `notarius run` after fixing
-the cause.
+Provider retries and timeouts are handled by Scriptorium according to the
+selected execution profile. Pipeline module retry settings are defined in
+[Configuration](config.md#module-bindings). There is no separate CLI retry
+command.
 
-Provider retries are limited to the OpenAI-compatible client retry behavior
-configured by the effective LLM profile. There is no separate CLI retry command.
+Extract worker concurrency and actual provider-call concurrency are separate
+limits. Their configuration, defaults, and validation are defined in
+[Configuration](config.md#concurrency). Cancellation stops undispatched extract
+work; already started work is allowed to finish or observe cancellation before
+the run reports failure.
 
 Notarius writes local files only. Remote storage and archive management are not
 part of the implemented CLI.

docs/policy/architecture.md

@@ -1,210 +1,212 @@
 # Architecture
 
-This document defines Notarius development policy. It is inward-facing:
-developers and LLM coding agents should use it to preserve the project's shape,
-boundaries, and invariants as the code evolves.
+This document defines the intended high-level architecture of Notarius and the
+invariants that changes must preserve. Implemented component details belong in
+[Internal Overview](../internal/overview.md) and its linked documents. The
+reasoning behind significant architectural choices belongs in
+[ADRs](../adr/).
 
-Keep this document concise. It should describe durable architectural rules, not
-CLI syntax, configuration reference material, module catalogs, or roadmap items.
+## System Shape
 
-## Project Shape
+Notarius is a small, dependency-light Go application for extracting structured
+artifacts from source material. It is a general extraction platform whose
+source formats, extraction domains, validation policies, LLM providers, and
+output formats are isolated behind explicit boundaries.
 
-Notarius is a small, explicit, dependency-light Go application for extracting
-structured artifacts from source material using modular pipeline stages.
-
-The application is contract-first but not abstraction-heavy. Add interfaces and
-extension points when they protect a real boundary:
-
-- external source formats;
-- pipeline stage modules;
-- validators;
-- LLM providers and runtime plumbing;
-- output schemas and embedded assets.
-
-Avoid abstractions that only anticipate hypothetical complexity. Prefer narrow
-contracts that can be exercised by tests and real modules.
-
-## Core Invariants
-
-The framework must remain source-agnostic and domain-agnostic.
-
-Source-format details belong in input modules. Transcript-specific concepts such
-as segments, speakers, timestamps, and transcript schemas must not spread into
-runner, extractor, validator, or LLM framework code.
-
-Extraction-domain details belong in domain modules. D&D-specific concepts such
-as spells, NPCs, items, combat turns, and encounters must not spread into core
-source, runner, or LLM framework packages.
-
-Extracted facts should be grounded with source references. Source references
-should point to generic source units, not transcript-only structures. Framework
-code should preserve source-reference ranges exactly and should not merge or
-rewrite overlapping ranges unless a module explicitly owns that behavior.
-
-The application workflow is fixed:
+The application has one fixed pipeline shape:
 
 ```text
 input -> chunk -> extract -> merge -> normalize -> output
 ```
 
-These stages should remain explicit in the architecture. Chunking, merging, and
-normalization must not be hidden inside domain extractors when they represent
-general pipeline behavior.
+Pipelines are configured compositions of this shape. They are not arbitrary
+DAGs or a general workflow language. Every stage remains explicit; general
+chunking, merging, or normalization behavior must not be hidden inside an
+extractor.
 
-Pipelines are fixed-shape templates for this workflow, not arbitrary DAGs or a
-general workflow language. Module selection should be configuration- and
-registry-driven, not scattered through conditionals.
+Input and chunking are pipeline-wide. Each selected artifact lane owns its
+extract, merge, and normalize stages, and the output stage aggregates the run's
+lane outcomes.
 
-## Package Boundaries
+Notarius is contract-first without being abstraction-heavy. Interfaces and
+extension points should protect demonstrated boundaries. New abstraction is not
+itself an architectural goal.
 
-Prefer fewer, larger framework packages until a boundary proves itself through
-import direction, ownership, test seams, or substantial file size.
+## Layers And Dependency Direction
 
-Core packages should contain deterministic models and policy. Framework
-packages should contain reusable orchestration and provider plumbing. Concrete
-business logic should live under stage-oriented module packages:
+The application boundary is the composition root and may depend on concrete
+implementations. Domain-neutral model and framework layers provide reusable
+policy, contracts, and orchestration. Concrete input, pipeline, output, and
+validation extensions depend inward on those generic layers.
 
-```text
-internal/modules/input/...
-internal/modules/chunk/...
-internal/modules/extract/...
-internal/modules/merge/...
-internal/modules/normalize/...
-internal/modules/output/...
-```
+Generic layers must not depend on production extensions. Concrete extensions
+must not compose the application or take ownership of process behavior. The
+current packages implementing these layers are inventoried in
+[Internal Overview](../internal/overview.md).
 
-Use short, lowercase, idiomatic Go package names. Avoid package names that repeat
-parent-stage context.
+The following dependency boundaries are mandatory:
 
-Input modules translate external source formats into the core source model.
-They may know about external schema details, source-specific metadata, and
-format-specific validation rules. They should not own extraction-domain
-decisions.
+- extractors and validators do not depend on concrete input adapters;
+- provider-specific types do not cross the LLM runtime boundary;
+- external dependency types do not leak across internal package boundaries
+  unless that dependency is the package's explicit contract.
 
-Extract modules own artifact semantics, prompt usage, structured response schema
-selection, validator defaults, and domain-specific interpretation. They should
-depend on framework contracts and core source/artifact types, not concrete input
-module packages.
+Shared helpers may support demonstrated common needs, but must not move
+source-format or extraction-domain knowledge into generic framework packages.
+External dependencies require a clear correctness, security, interoperability,
+or complexity benefit.
 
-Merge modules combine extracted candidates. Normalize modules reconcile merged
-candidates for semantic consistency. Generic behavior may exist for simple
-artifact types, but domain-specific behavior belongs in modules for the relevant
-stage.
+## Source And Domain Boundaries
 
-Output modules serialize final artifacts and may report warnings out of band.
-CLI, diagnostics, and reporting layers are responsible for surfacing those
-warnings.
+Input modules translate external source formats into the generic source model.
+Format-specific schemas, fields, and validation remain with the input module
+and its integration contract.
+
+Framework stages operate on source documents, source units, and source
+references rather than format-specific structures. A source reference identifies
+an ordered range of generic source units. Framework code preserves those ranges
+and does not merge or rewrite them unless a stage module explicitly owns that
+behavior. Every source unit carries a validated self-reference to its containing
+document and its own unit ID.
+
+Extract modules own artifact semantics, prompt use, response schemas, and
+domain interpretation. Domain-specific concepts remain in the relevant module,
+validator, shared domain helper, and artifact contract.
+
+Typed artifact registrations declare one stable artifact kind and exact Go
+type from extraction through merge, normalization, and semantic validation.
+Pipeline resolution requires a compatible codec and matching kind-specific
+variants before a typed lane can be accepted. Framework-owned erasure remains
+private and must report type incompatibility as an error rather than a panic.
+
+Auxiliary references provide context or disambiguation. They are not source
+evidence and must not be converted into source references.
+
+## Pipeline Composition And Ownership
+
+Module selection is configuration- and registry-driven. The framework resolves
+named pipeline definitions, applies explicit defaults and runtime overrides,
+and verifies module availability and capabilities before execution. Structural
+pipeline choices must not be scattered through conditionals or hidden behind
+ad hoc command flags.
+
+Resolution validates every selected module and validator option set. A separate
+preparation boundary then constructs the complete input, chunk, lane,
+validation, and output implementation set in pipeline order. The runner accepts
+only that prepared set, so construction and dependency failures occur before
+source parsing or any other module operation.
+
+Stage ownership is explicit:
+
+- input modules convert external material into the generic source model;
+- chunk modules partition source material for extraction;
+- extract modules produce domain artifacts from chunks;
+- merge modules combine accepted extraction outputs;
+- normalize modules reconcile merged output;
+- output modules encode accepted results and run outcomes into logical files.
+
+The framework owns orchestration and handoff provenance. Modules return logical
+results and warnings; they do not own CLI reporting, workspace paths, durable
+file placement, checkpoints, or diagnostics.
+
+After pipeline-wide chunking, extraction uses bounded framework concurrency.
+One run-wide worker pool receives chunk-scoped lane jobs in deterministic
+chunk-first, lane-second order. A lane may begin its merge and normalize
+continuation only after all of its extract jobs are terminal; that continuation
+remains serial within the lane, while bounded continuations for different lanes
+may overlap. The framework must not create unbounded goroutines per lane or
+chunk.
+
+Completion timing does not choose public ordering or errors. The coordinator
+orders accepted artifacts, warnings, rejections, checkpoint events, and
+framework errors by stable pipeline scope. Rejections do not cancel unrelated
+work. A framework error cancels derived work, prevents undispatched work from
+starting, waits for started work, and prevents output encoding.
 
 ## Validation
 
-Validators should be independently testable and composable.
+Validation is a framework-managed boundary around outputs from chunk, extract,
+merge, and normalize stages. Validators receive immutable stage output
+and make an explicit whole-output decision: approve, approve with warnings, or
+reject.
 
-Deterministic validators should run before LLM-backed validators when both are
-present. Validator decision semantics should be explicit: each candidate
-artifact evaluated by a validator should receive exactly one decision from that
-validator.
+Typed artifact validators receive the domain value directly. Chunk validators
+receive source-zone chunks, while serialized validators receive immutable
+representation bytes and declared schema metadata. A validator registered for
+one target or artifact kind cannot satisfy an incompatible selection.
 
-LLM-backed review belongs in module-owned validator chains, not in an implicit
-global review phase. Extract and normalize modules may both use deterministic
-and LLM-backed validators.
+Rejection is a recorded pipeline outcome, not a framework execution error.
+Validator execution failures are framework errors. Rejected output does not
+advance to the next stage.
 
-Shared validator runtime mechanics belong in framework code. Concrete validator
-behavior belongs in module or validator implementation packages.
+Default validator chains are production composition policy and are registered
+centrally by stage and module. Configuration may replace a stage-local default,
+including with an explicitly empty chain. Configured validator order is
+authoritative; the framework must not silently reorder it.
 
-## LLM Runtime
+## LLM Boundary
 
-LLM provider details belong behind transport-neutral framework contracts.
+Modules and validators use transport-neutral structured completion contracts.
+Provider request and response types, authentication, transport behavior, and
+provider error adaptation remain inside the LLM runtime.
 
-Provider-specific HTTP request and response types should stay inside the LLM
-runtime package. Prompt construction should stay in extractors, validators, or
-shared prompt helpers; provider adapters should not own domain prompt logic.
+The caller of the LLM owns prompt selection, prompt inputs, response schema,
+and interpretation of structured output. Provider adapters do not own source-
+or domain-specific prompt logic.
 
-Errors, diagnostics, reports, manifests, and redacted configuration must not
-expose secrets.
+LLM calls and other external operations accept cancellation and respect
+timeouts. Concurrency control belongs in shared runtime plumbing rather than in
+individual modules.
 
-## Configuration
+The application-wide LLM scheduler bounds actual provider calls independently
+of framework worker limits. Every LLM-backed module, retry, and validator uses
+the single injected scheduled client, including work performed by overlapping
+lanes.
 
-Configuration should make pipeline composition explicit and discoverable.
+## Configuration And Provenance
 
-Centralize configuration loading, precedence, defaults, and validation. Structural
-pipeline choices should come from named pipeline definitions, not ad hoc command
-flags. Operational overrides may be handled separately when they do not obscure
-the configured pipeline structure.
+Configuration loading, precedence, defaults, environment overrides, redaction,
+and validation are centralized. Named pipeline definitions make structural
+composition explicit and discoverable. Operational overrides are permitted
+when they do not obscure the configured pipeline structure.
 
-Module registries should expose module metadata and capabilities without
-requiring module construction. Configuration validation should fail fast when a
-pipeline binds incompatible or unknown modules.
+Run preparation fails before stage execution when statically discoverable
+modules, capabilities, reference bindings, or explicitly selected profiles are
+invalid or incompatible.
 
-Run manifests should record enough resolved pipeline provenance to make a run
-auditable after named configuration changes over time.
+Run manifests record enough resolved pipeline, module, source, reference, and
+LLM provenance to make a run auditable after configuration changes. Manifests
+record identities and summaries rather than secret or large payload content.
 
-## Dependencies
+## State, Output, And Safety
 
-Prefer the Go standard library where practical.
+Durable output, diagnostics, checkpoints, and debug artifacts are separate
+surfaces with separate ownership:
 
-Use external dependencies only when justified by correctness, security,
-interoperability, or substantial complexity reduction. Good reasons include
-widely used file formats, complex validation behavior, or secure transport
-handling.
+- output modules define logical durable output; the application boundary owns
+  filesystem placement;
+- diagnostics provide redacted run inspection and are not the durable output
+  contract;
+- checkpoints support validated stage reuse and are not diagnostics;
+- debug artifacts are opt-in inspection data and may contain sensitive source,
+  prompt, reference, and model-output content.
 
-Avoid dependencies for small conveniences. Do not let external dependency types
-leak across internal package boundaries unless the dependency is itself the
-explicit contract of that package.
+Writes of durable state are atomic where practical. Paths for writes, moves,
+overwrites, and deletion must be narrow and explicit. Cleanup that can lose data
+is opt-in.
 
-## State, Files, and Safety
+Secrets must not appear in errors, logs, diagnostics, manifests,
+documentation, examples, or redacted configuration. Default logs and
+diagnostics must not include large source, prompt, reference, or artifact
+payloads.
 
-If the application writes durable state, writes should be atomic where
-practical. Multi-step workflows should preserve enough diagnostics to support
-inspection after failure.
+## Architectural Non-Goals
 
-Code that deletes, moves, or overwrites files must use narrow, explicit paths.
-Avoid broad parent-directory operations. Cleanup that can cause data loss must
-be opt-in.
+Notarius does not aim to provide:
 
-## Errors and Logging
-
-Errors should be actionable and preserve context. Wrap errors with operation and
-path or resource context. CLI code should convert internal errors into concise
-user-facing messages.
-
-Errors and logs must not expose secrets. Logs should describe operations,
-external calls, retries, and failure causes, but should not include large source
-or artifact payloads by default.
-
-Long-running operations should accept `context.Context`. External calls,
-subprocesses, HTTP requests, storage operations, LLM calls, and multi-stage
-workflows should respect cancellation and timeouts.
-
-## Testing
-
-Core logic should be testable without real external services. Use fakes,
-fixtures, or local test doubles for input modules, extract modules, validators,
-and LLM clients where practical.
-
-Contract-first work should include fake implementations that prove interfaces
-compose before real modules depend on them.
-
-Maintain a fixture-driven walking skeleton that exercises the full pipeline with
-fake modules and fake external clients. This protects stage composition as real
-modules evolve.
-
-Important CLI and configuration workflows should have tests. Adapter, extractor,
-validator, and stage contracts should have focused tests that do not require
-running the full application unless end-to-end coverage is intentional.
-
-## Documentation
-
-Documentation should follow the project documentation policy. Keep user docs
-focused on implemented behavior. Put future, planned, or aspirational work only
-under `docs/roadmap/`.
-
-Core documentation should use generic terms such as source document, source
-unit, source reference, input adapter, extractor, chunker, merger, normalizer,
-artifact, validator, and run manifest.
-
-Source-format details belong in input module or integration docs.
-Domain-specific extraction details belong in extract module or artifact docs.
-
-When changing architecture, config, CLI behavior, stage modules, extractor
-contracts, validator contracts, LLM runtime behavior, or artifact schemas, update
-the relevant docs and examples in the same change.
+- an arbitrary workflow graph or general workflow language;
+- source-format or extraction-domain behavior in generic framework packages;
+- provider-specific contracts exposed to modules;
+- structural pipeline composition through ad hoc CLI flags;
+- implicit cross-stage behavior that bypasses the fixed pipeline;
+- abstractions introduced solely for hypothetical future complexity.

docs/policy/development.md

@@ -1,139 +0,0 @@
-# Development
-
-This document defines contributor workflow for Notarius. For architectural
-invariants and package boundaries, read [Architecture](architecture.md) first.
-
-## Required Reading
-
-Before changing the repository, review:
-
-- [Architecture](architecture.md)
-- [Documentation Policy](documentation.md)
-
-Keep current-behavior documentation limited to implemented behavior. Put planned
-or deferred behavior under `docs/roadmap/`.
-
-## Repository Layout
-
-- `cmd/notarius`: executable entry point.
-- `internal/cli`: CLI parsing, production catalog wiring, config loading, run
-  command orchestration, output writes, and user-facing errors.
-- `internal/core`: deterministic models and policy for artifacts, source
-  documents, config, and diagnostics.
-- `internal/framework`: reusable contracts, pipeline orchestration, prompt
-  helpers, validation helpers, and LLM runtime plumbing.
-- `internal/modules`: concrete input, chunk, extract, merge, normalize, and
-  output modules.
-- `docs`: policy, user/operator docs, internal docs, integration docs, and
-  roadmap files.
-- `examples`: maintained, secret-free examples covered by tests where practical.
-
-## Validation Commands
-
-Run focused tests for the area changed, then run the broader checks when the
-change affects shared contracts, CLI behavior, or documentation examples.
-
-```sh
-go test ./...
-go vet ./...
-go build ./cmd/notarius
-```
-
-Useful focused checks:
-
-```sh
-go test ./internal/cli
-go test ./internal/core/config
-go test ./internal/framework/pipeline
-go test ./internal/framework/llm
-go test ./internal/modules/input/seriatim
-go test ./internal/modules/extract/dnd/spells
-go test ./internal/modules/output/json
-```
-
-## Go Conventions
-
-- Prefer the standard library unless a dependency is justified by correctness,
-  security, interoperability, or substantial complexity reduction.
-- Keep package names short, lowercase, and idiomatic.
-- Preserve import direction: framework and core code must not depend on concrete
-  production modules.
-- Use `context.Context` for long-running operations and external calls.
-- Return contextual errors that name the operation and relevant module, path, or
-  resource.
-- Do not include secrets in errors, logs, diagnostics, manifests, or docs.
-
-## Adding Config Fields
-
-Config behavior is centralized under `internal/core/config`.
-
-When adding a file config field:
-
-1. Update file config structs and YAML parsing in `file_config.go`.
-2. Apply the field over defaults in config application code.
-3. Add validation in `validation.go` when the field has constraints.
-4. Add environment override support in `env.go` only for operational overrides.
-5. Update redaction if the field can contain secrets.
-6. Add focused config tests.
-7. Update [Configuration](../config.md) and maintained examples when behavior
-   changes.
-
-Pipeline composition should remain config-driven. Do not add command flags that
-silently replace structural pipeline definitions.
-
-## Adding CLI Flags Or Commands
-
-CLI behavior lives in `internal/cli`.
-
-When adding CLI surface:
-
-1. Keep syntax explicit and update usage text.
-2. Validate arguments before running expensive work.
-3. Convert internal errors into concise user-facing messages.
-4. Add CLI tests for success, syntax errors, and failure modes.
-5. Update [CLI Reference](../cli.md), and update
-   [Operations](../operations.md) or [Troubleshooting](../troubleshooting.md)
-   if run behavior changes.
-
-## Adding Modules Or Adapters
-
-Concrete modules live under `internal/modules/<kind>/...` and implement the
-interfaces in `internal/framework/contracts`.
-
-For a new production module:
-
-1. Implement the relevant contract.
-2. Expose a `ModuleSpec` with the correct module key, module kind, provided
-   capabilities, and required capabilities.
-3. Expose a `Register` function that registers the module with its registry.
-4. Add focused module tests for contract behavior, registration, options,
-   validation, and errors.
-5. Register the module in `internal/cli/catalog.go` only when it is production
-   ready.
-6. Update internal docs and user-facing docs only for implemented behavior.
-
-Source-format behavior belongs in input modules and integration docs.
-Extraction-domain behavior belongs in extract modules and artifact docs.
-
-## Updating Examples
-
-Examples must be valid, secret-free, and small.
-
-- Prefer environment-based secret configuration.
-- Keep `examples/dnd-spells.config.yml` loadable by CLI tests.
-- Keep `examples/seriatim-minimal-transcript.json` compatible with the Seriatim
-  adapter.
-- Do not add expected-output fixtures unless they are validated or have a clear
-  regeneration procedure.
-
-## Documentation Updates
-
-Update docs in the same change when behavior changes.
-
-- CLI syntax: `docs/cli.md`
-- Config fields and defaults: `docs/config.md`
-- Output, diagnostics, retention, or recovery: `docs/operations.md`
-- Common user-facing failures: `docs/troubleshooting.md`
-- Internal architecture and contracts: `docs/internal/`
-- External file formats and durable integration contracts: `docs/integrations/`
-- Future or planned work only: `docs/roadmap/`

docs/policy/documentation.md

@@ -1,446 +1,143 @@
-# Go Project Documentation Policy
+# Documentation Policy
 
 ## Purpose
 
-Project documentation must help five audiences:
-
-1. users who need to run the application;
-2. administrators/operators who need to configure and operate it;
-3. developers who need to understand and change it safely;
-4. LLM coding agents that need clear scope, boundaries, and invariants;
-5. developers and LLM coding agents integrating this project from another codebase.
-
-Docs should be accurate, concise, task-oriented, and organized by audience. Prefer links to canonical docs over repetition.
+This policy assigns each documentation topic to one canonical owner. Its goal is
+to keep Notarius documentation accurate, concise, discoverable, and resistant
+to drift for users, operators, developers, integrators, and LLM coding agents.
 
 ## Core Rules
 
-### 1. Keep docs concise
+### One Canonical Owner
 
-Each document should cover a defined scope and only the essentials for that scope.
+Each authoritative fact belongs in one document. A non-owning document may give
+a short, stable summary for orientation, but it must link to the canonical owner
+instead of repeating volatile details.
 
-Avoid:
-- long background explanations;
-- repeated reference material;
-- implementation detail in user-facing docs;
-- aspirational language outside roadmap docs;
-- verbose examples where one minimal example is clearer.
+Volatile details include commands, flags, configuration fields and defaults,
+module keys, schemas, file names, paths, status codes, retry behavior, and
+runtime guarantees. If readers could reasonably treat a statement as a
+contract, maintain it only in the owning document.
 
-### 2. Document only implemented behavior outside roadmap files
+### Current And Future Behavior
 
-Unimplemented, planned, aspirational, experimental, or future work may be described only under:
+Outside `docs/roadmap/`, documentation describes implemented behavior only.
+Partial features may be described only to their implemented boundary.
+
+ADRs are the narrow exception: an ADR may record an accepted architectural
+decision before implementation, but acceptance must not be presented as proof
+that the behavior exists. The roadmap owns implementation status and sequencing
+until the decision is implemented. Current architecture, user, operator,
+integration, and internal documentation are updated when the behavior lands.
 
-- `docs/roadmap/`
+### Audience And Detail
 
-No other documentation file, including `README.md`, should describe code, features, modules, stages, commands, config fields, or behaviors that do not currently exist.
+Write for the document's stated audience and include only the detail needed for
+its owned topic. User and operator docs should not expose implementation detail.
+Developer docs should link to user-facing and external contracts rather than
+restate them.
 
-If a feature is partial, non-roadmap docs may describe only the implemented portion and its current boundary.
+### Examples
 
-### 3. Use canonical homes
-
-Each type of information should have one canonical location.
-
-Canonical homes:
-
-- project purpose and quickstart: `README.md`
-- development principles: `docs/policy/architecture.md`
-- public HTTP API reference: `docs/api.md`
-- configuration reference: `docs/config.md`
-- CLI reference: `docs/cli.md`
-- operations and recovery: `docs/operations.md`
-- troubleshooting: `docs/troubleshooting.md`
-- public API/package consumer guidance: `docs/consumers/`
-- implemented internals: `docs/internal/`
-- external protocol, service, and file-format contracts: `docs/integrations/`
-- future work: `docs/roadmap/`
-- contributor workflow: `docs/policy/development.md`
-- copyable examples: `examples/`
-
-Other files should summarize briefly and link to the canonical source.
-
-### 4. Keep examples real
-
-Examples should be valid, maintained, and free of secrets.
-
-Where practical:
-- example configs should load successfully;
-- example commands should match real CLI syntax;
-- important examples should be covered by tests.
-
-## Documentation Profiles
-
-All projects require:
-
-- `README.md`
-- `docs/policy/architecture.md`
-
-Additional docs depend on the project.
-
-### Small library
-
-Recommended:
-- `docs/policy/development.md`, if contributor conventions are non-obvious
-
-### Simple CLI
-
-Required:
-- `docs/cli.md`
-
-Recommended:
-- `docs/policy/development.md`
-
-### Config-driven CLI
-
-Required:
-- `docs/cli.md`
-- `docs/config.md`
-
-Recommended:
-- `examples/`
-- `docs/policy/development.md`
-
-### Stateful or operator-facing application
-
-Required:
-- `docs/cli.md`, if CLI-based
-- `docs/config.md`, if config-driven
-- `docs/operations.md`
-
-Recommended:
-- `docs/troubleshooting.md`
-- `examples/`
-- `docs/policy/development.md`
-
-### Modular, service-oriented, or orchestration application
-
-Required:
-- `docs/cli.md`, if CLI-based
-- `docs/config.md`, if config-driven
-- `docs/operations.md`
-- `docs/internal/`
-- `docs/policy/development.md`
-
-Recommended:
-- `docs/troubleshooting.md`
-- validated examples under `examples/`
-
-### Public HTTP API service
-
-Required:
-- `docs/api.md`
-- `docs/cli.md`, if CLI-based
-- `docs/config.md`, if config-driven
-- `docs/operations.md`
-- `docs/internal/`
-- `docs/policy/development.md`
-
-Recommended:
-- `docs/troubleshooting.md`
-- `docs/consumers/`, for task-oriented client integration guides
-- `docs/integrations/`, for upstream/downstream service contracts
-- validated examples under `examples/`
-
-### Project with public packages or consumer APIs
-
-Required:
-- `docs/consumers/api.md`
-- one `docs/consumers/pkg-<name>.md` file per public package, if public packages exist
-
-Recommended:
-- copyable consumer examples under `examples/`, if practical
-
-## Required Documents
-
-### README.md
-
-**Audience:** users, administrators, operators
-
-The README is the outward-facing project orientation page.
-
-It should include, in order:
-
-1. concise description;
-2. elevator pitch;
-3. shortest useful command or usage example;
-4. links to targeted docs.
-
-The README should be short. It is not a manual.
-
-The “shortest useful command” means the simplest command that performs the project’s core use case. (It does not mean `app --help`.)
-
-### docs/policy/architecture.md
-
-**Audience:** developers, LLM coding agents
-
-`docs/policy/architecture.md` is required for every project.
-
-It is an inward-facing development policy document. It should describe how the project is intended to be built and changed.
-
-It should include:
-
-- project shape;
-- core design principles;
-- package and boundary philosophy;
-- state/persistence philosophy, if applicable;
-- external integration philosophy, if applicable;
-- error-handling and logging principles;
-- testing expectations;
-- documentation expectations;
-- architectural invariants;
-- explicit non-goals, if useful.
-
-Notably, this file should prescribe a core development *policy* that should remain unchanged as the application evolves. It is not a place for details (e.g., CLI flags) that could change over time.
-
-The contents of `architecture.md` should be trim and concise. LLMs may be directed to review it routinely via AGENTS.md, CLAUDE.md, or similar.
-
-### docs/api.md
-
-**Audience:** external HTTP API consumers, developers, LLM coding agents integrating by HTTP
-
-Required for projects whose primary public interface is HTTP.
-
-`docs/api.md` is the canonical public HTTP API contract. It should be normative for external consumers and should not be duplicated by README, operations docs, consumer guides, or integration docs.
-
-It should include:
-
-1. base URL conventions;
-2. authentication and authorization behavior, if implemented;
-3. response envelope;
-4. supported media types and content negotiation behavior;
-5. shared query parameters;
-6. endpoint reference grouped by route family;
-7. request parameters and validation rules;
-8. response fields, units, nullability, and optionality;
-9. error response shape and status codes;
-10. pagination, caching, rate-limit, idempotency, and retry behavior, if implemented;
-11. compact request and response examples.
-
-It must document only implemented endpoints and behavior. Planned endpoints, proposed fields, future filters, and experimental response shapes belong only under `docs/roadmap/`.
-
-For HTTP API projects, `docs/consumers/` may provide task-oriented client integration guides, but those guides should link to `docs/api.md` for the authoritative endpoint contract.
-
-### docs/policy/development.md
-
-**Audience:** developers, LLM coding agents
-
-Required for projects maintained by humans and LLM coding agents.
-
-It should include:
-
-- repository layout;
-- build/test commands;
-- coding conventions;
-- dependency policy;
-- how to add config fields;
-- how to add CLI flags;
-- how to add modules or adapters, if applicable;
-- how to update examples;
-- documentation update expectations.
-
-### docs/config.md
-
-**Audience:** administrators, operators, advanced users
-
-Required for applications with configuration files.
-
-It should include, in order:
-
-1. config file locations and discovery precedence;
-2. minimal working config;
-3. production-oriented config;
-4. full configuration reference;
-5. secrets handling, if applicable;
-6. links to maintained examples.
-
-The full configuration reference should be canonical.
-
-### docs/cli.md
-
-**Audience:** users, administrators, operators
-
-Required for CLI applications.
-
-It should include, in order:
-
-1. shortest useful command;
-2. command overview;
-3. complete flag reference;
-4. common workflows;
-5. diagnostic or recovery commands, if applicable.
-
-Explain when commands are useful, not just their syntax.
-
-### docs/operations.md
-
-**Audience:** administrators, operators
-
-Required for applications that maintain state, support resume behavior, run multi-step workflows, write durable artifacts, use remote storage, or require recovery procedures.
-
-It should cover:
-
-- normal workflow;
-- filesystem layout;
-- remote storage layout, if applicable;
-- logs and manifests;
-- resume/retry behavior;
-- cleanup behavior;
-- archive/backup behavior;
-- safe recovery procedures;
-- operational caveats.
-
-### docs/troubleshooting.md
-
-**Audience:** administrators, operators
-
-Recommended once recurring failure modes exist.
-
-Each entry should include:
-
-- symptom;
-- likely cause;
-- diagnostic command or inspection step;
-- safe fix;
-- relevant links.
-
-### docs/consumers/
-
-**Audience:** developers and LLM coding agents integrating this project from another codebase
-
-Required for projects with public packages, SDKs, client APIs, plugin APIs, or other application-facing integration surfaces.
-
-This directory describes how an external codebase should consume the project's public API. It should be task-oriented and copyable where useful. It is not the place for internal implementation details or operator procedures.
-
-For projects whose public API is HTTP, `docs/consumers/` is not required, and it should not duplicate the endpoint reference in `docs/api.md`. If present, it may provide practical integration workflows, client-specific examples, or migration notes that link back to `docs/api.md`.
-
-`docs/consumers/api.md` should provide the consumer-facing overview and primary implementation workflow. It should include:
-
-1. intended consumer audience and use cases;
-2. required inputs supplied by operators or deployment configuration;
-3. recommended public package or API workflow;
-4. minimal copyable example;
-5. consumer responsibilities and boundaries;
-6. retry, idempotency, or status behavior, if applicable;
-7. links to package-specific docs and canonical integration contracts.
-
-Package-specific docs should be named `pkg-<name>.md` and should include:
-
-1. import path;
-2. intended use cases;
-3. primary types and functions needed by consumers;
-4. minimal examples;
-5. validation, error, retry, and boundary behavior;
-6. links to canonical file-format or wire-protocol contracts.
-
-### docs/internal/
-
-**Audience:** developers, LLM coding agents
-
-Required for modular, service-oriented, or orchestration projects.
-
-This directory describes implemented internal components. It is not the roadmap.
-
-Use one file per major component where useful.
-
-Each component doc should include:
-
-1. purpose;
-2. inputs and outputs;
-3. boundaries;
-4. config fields used;
-5. external adapters used;
-6. state or manifest behavior, if applicable;
-7. skip/resume behavior, if applicable;
-8. failure behavior;
-9. tests to inspect before changing;
-10. architectural invariants.
-
-### docs/roadmap/
-
-**Audience:** maintainers, developers, LLM coding agents
-
-This is the only place for planned, future, aspirational, experimental, or unimplemented work.
-
-Roadmap docs should clearly distinguish:
-
-- proposed work;
-- accepted plans;
-- deferred ideas;
-- rejected ideas;
-- implementation prompts or task breakdowns, if useful.
-
-Roadmap docs should not be confused with current behavior.
-
-### docs/integrations/
-
-**Audience:** developers, LLM coding agents
-
-Required for projects that depend on external CLIs, APIs, services, protocols, or file formats where the integration contract is important to maintain.
-
-This directory contains concise, versioned reference notes for external integration contracts. It should document only the parts of the external system that this project actually uses or exposes.
-
-For public HTTP API services, `docs/integrations/` should document upstream, downstream, storage, protocol, or runtime contracts that the service depends on or bridges. It should not become a second copy of the public HTTP endpoint reference; that belongs in `docs/api.md`.
-
-Use one file per integration where useful.
-
-## Examples Directory
-
-Projects with non-trivial configuration or workflows should include `examples/`.
-
-Useful examples include:
-
-- minimal working config;
-- production-oriented config;
-- full annotated config;
-- local development config;
-- remote/object-storage config;
-- minimal session/input file.
-
-Examples should be valid, maintained, tested when practical, and linked from relevant docs.
-
-## Security and Privacy
-
-Docs and examples must not include:
-
-- real API keys;
-- tokens;
-- passwords;
-- private keys;
-- private environment dumps;
-- sensitive user data;
-- raw private transcripts;
-- private infrastructure details unless intentionally public.
-
-Document secret-handling mechanisms, not actual secret values.
-
-## Maintenance Rules
-
-When docs change, verify the affected behavior.
-
-Where practical:
-
-- load example config files in tests;
-- test CLI examples or command parser behavior;
-- validate documented flags against real flags;
-- remove stale references;
-- update links after renames;
-- keep roadmap content out of non-roadmap docs.
-
-If documentation and code disagree, fix the documentation and/or open a roadmap item; do not leave aspirational behavior in current-behavior docs.
-
-Documentation is complete only when it matches the current code.
-
-## Documentation Change Checklist
-
-Before merging documentation changes, verify:
-
-- README is concise and orientation-focused.
-- `docs/policy/architecture.md` describes development principles.
-- `docs/api.md` is the canonical HTTP contract for HTTP API services.
-- Future work appears only under `docs/roadmap/`.
-- User-facing docs avoid unnecessary internals.
-- Consumer-facing docs explain public APIs without duplicating HTTP endpoint or integration contracts.
-- Developer-facing docs preserve boundaries and invariants.
-- Config examples match the schema.
-- CLI examples match real commands and flags.
-- Defaults appear in the canonical config reference.
-- No secrets or private data are included.
-- Links are accurate.
+Complete copyable files belong in `examples/`. Documentation may use the
+smallest illustrative snippet needed to explain its owned topic, but should link
+to maintained examples instead of embedding a second complete copy.
+
+Examples must be valid, secret-free, and tested where practical. Commands and
+configuration used in documentation should match the application.
+
+### Security And Privacy
+
+Documentation and examples must not contain real credentials, private keys,
+private environment dumps, sensitive source material, or private infrastructure
+details unless intentionally public. Document secret-handling mechanisms, not
+secret values.
+
+## Canonical Ownership
+
+| Topic | Canonical owner | Owned content | Content owned elsewhere |
+| --- | --- | --- | --- |
+| Product orientation and minimal end-to-end quickstart | `README.md` | What Notarius is, why it is useful, one shortest successful invocation, and links onward. | Complete command reference, configuration reference, operational procedures, implementation detail. |
+| Contributor entry point | `docs/development.md` | Task-oriented reading guide, minimal contributor orientation, baseline validation commands, and links to canonical docs. | Package inventory, architecture rules, subsystem behavior, detailed change recipes. |
+| Current application architecture | `docs/policy/architecture.md` | System shape, normative ownership, dependency direction, architectural boundaries, invariants, safety properties, and non-goals. | Concrete package inventory, implementation mechanics, contributor procedures, decision history, future work. |
+| Documentation organization | `docs/policy/documentation.md` | Documentation ownership, audience boundaries, maintenance rules, and ADR/document lifecycle. | Application architecture or product behavior. |
+| CLI contract | `docs/cli.md` | Commands, arguments, flags, invocation semantics, and exit codes. | End-to-end operating procedures, configuration field definitions, runtime filesystem layout, module implementation details. |
+| Configuration contract | `docs/config.md` | Discovery and precedence, file schema, fields, defaults, environment overrides, validation rules, and user-selectable module or validator keys. | Complete example files, CLI syntax, runtime state lifecycle, module implementation details. |
+| Operations | `docs/operations.md` | Runtime workflows, physical filesystem and state layout, diagnostics use, retention, resume, cleanup, permissions, recovery, and operational limits. | CLI flag syntax, configuration field definitions, logical output schemas, implementation mechanics. |
+| Public HTTP contract, if introduced | `docs/api.md` | Routes, authentication, media types, request and response schemas, status codes, pagination, caching, idempotency, rate limits, and HTTP retry semantics. | Client walkthroughs, upstream or downstream integration internals, implementation detail. |
+| Consumer guidance, if a public package or API is introduced | `docs/consumers/` | Task-oriented use of the public interface, minimal client examples, and consumer responsibilities. | HTTP wire semantics, external protocol contracts, internal implementation detail. |
+| External and durable integration contracts | `docs/integrations/` | External file formats and protocols, upstream and downstream contracts, logical output bundle paths and schemas, media types, and compatibility behavior. | Physical runtime placement and lifecycle, internal transformations, CLI syntax, configuration defaults. |
+| Implemented component inventory | `docs/internal/overview.md` | Current packages and components, their implemented responsibilities, and links to focused internal docs. | Normative architecture, contributor reading policy, external contracts. |
+| Internal component behavior | Other files under `docs/internal/` | Implementation flow, internal collaborators and state transitions, package-local guarantees and failures, and relevant tests. | Global architecture invariants, configuration definitions and defaults, external schemas, operator procedures. |
+| Architectural decision history | `docs/adr/` | Significant decisions, context, alternatives, rationale, consequences, and supersession history. | Current behavior reference, implementation status, task sequencing. |
+| Future work and implementation status | `docs/roadmap/` | Proposed, accepted, deferred, or rejected work; implementation status; sequencing; and task breakdowns. | Implemented behavior reference and architectural decision rationale. |
+| Complete copyable artifacts | `examples/` | Maintained configuration, inputs, and other files intended to be copied or run. | Field-by-field reference, command reference, prose explanation. |
+
+Documents that do not exist are required only when the corresponding interface
+or responsibility exists. Do not create placeholder API, consumer, integration,
+or operations documents for behavior the application does not have.
+
+## Boundary Rules
+
+### Orientation
+
+The README owns product orientation. The developer guide routes contributors.
+Architecture owns normative structure. Internal overview owns the current
+concrete component map. These documents may link to one another but should not
+maintain parallel package or behavior descriptions.
+
+### Commands, Configuration, And Operations
+
+CLI documentation answers how to invoke the application. Configuration
+documentation answers what settings mean. Operations answers what happens to
+runtime state and how to operate or recover the application. When a workflow
+crosses these topics, choose the document that owns the task and link to the
+other contracts.
+
+### Contracts And Implementation
+
+Integration and API documents define externally observable shapes and
+semantics. Internal documents explain how Notarius implements or consumes those
+contracts. Internal docs may name a field, file, or protocol to identify a
+dependency, but must link to its canonical contract for the definition.
+
+### Security Topics
+
+This policy owns what documentation and examples may contain. Architecture owns
+application security invariants. Configuration owns credential-supply
+mechanisms. Operations owns permissions and handling of sensitive runtime
+artifacts. Internal docs own implementation mechanisms only.
+
+## Architecture Decision Records
+
+Use sequentially numbered ADR filenames such as
+`0001-record-architecture-decisions.md`. Follow the lightweight Nygard format:
+
+1. title;
+2. status;
+3. date;
+4. context;
+5. decision;
+6. alternatives considered;
+7. consequences.
+
+Treat the decision content of an accepted ADR as immutable. When a decision
+changes, create a new ADR and update the earlier ADR's status to superseded.
+Rejected architectural alternatives belong in the ADR; rejected product ideas
+belong in the roadmap.
+
+## Maintenance
+
+When behavior changes, update its canonical owner in the same change. If
+ownership moves, remove the old definition and replace it with a link where
+navigation remains useful.
+
+Before completing documentation work:
+
+- verify affected behavior and examples;
+- check commands, flags, fields, defaults, schemas, and paths against their
+  implementation;
+- keep unimplemented behavior in the roadmap, subject to the ADR exception;
+- remove stale references and validate links;
+- confirm that non-owning documents summarize and link rather than redefine;
+- confirm that no secrets or sensitive private data were added.

docs/roadmap/domain.md

@@ -0,0 +1,348 @@
+# Domain-Typed Pipeline Feature Roadmap
+
+## Status
+
+Implemented on 2026-07-17. This roadmap records the design delivered for
+[ADR-0002](../adr/0002-linear-pipes-and-filters-pipeline.md),
+[ADR-0003](../adr/0003-typed-interfaces-with-two-zone-data-model.md), and
+[ADR-0004](../adr/0004-package-modules-by-domain.md). Its implementation history
+is summarized in the [completion record](implementation.md).
+
+This file is historical design context, not a current-behavior reference.
+Implemented contracts and mechanics are defined by the architecture,
+configuration, integration, operations, and internal documentation outside
+`docs/roadmap/`.
+
+## User Intent
+
+Notarius should remain a small, explicit pipes-and-filters application while
+making domain extensions safe to compose and straightforward to maintain. A
+configured pipeline should fail before execution when its modules are
+incompatible, should carry typed domain values rather than reparsed JSON between
+artifact stages, and should preserve provenance and durable output contracts.
+
+The application must also enforce one configurable, process-wide ceiling on
+in-flight LLM calls. Pipeline scheduling may impose stricter limits, but no
+stage, lane, retry, validator, or future LLM-backed extension may bypass that
+global ceiling.
+
+## Target Architecture
+
+### Pipeline and outcome model
+
+The topology remains:
+
+```text
+input -> chunk -> extract -> merge -> normalize -> output
+```
+
+Input and chunk are pipeline-wide. Extract, merge, normalize, and their
+validators operate per artifact lane. Output aggregates the terminal artifacts
+from all lanes. The resolved pipeline retains explicit fields for those roles;
+it does not become a general DAG or a heterogeneous ordered-stage list.
+
+Framework errors abort the run. Validator rejection is a recorded domain
+outcome and does not abort unrelated work. Accepted extract results reach merge
+in source-chunk order, regardless of execution completion order. Warnings,
+rejections, artifacts, and reported errors are likewise ordered by stable
+pipeline scope rather than goroutine completion time.
+
+### Engine-owned source model
+
+The engine owns `source.SourceDocument`, `source.SourceUnit`, `source.SourceRef`,
+and `source.Chunk`. Domain modules may consume these types but must not redefine
+their provenance semantics.
+
+- Every source unit has a canonical self-reference identifying its source and
+  unit range.
+- A chunk contains ordered source units and one canonical reference spanning
+  its first through last unit.
+- Chunk and unit references are validated for source identity, order, and
+  containment.
+- Auxiliary reference material remains distinct from source provenance.
+- Cloning, canonicalization, checkpointing, debugging, and digest computation
+  preserve the source references exactly.
+
+`source.Chunk.Ref` replaces duplicate start/end boundary fields. Because that
+changes persisted workspace state, the workspace checkpoint schema advances to
+`notarius.workspace.v2`. Existing v1 checkpoints are left intact but treated as
+incompatible and recomputed; no in-place migration or deletion is required.
+
+### Typed artifact lanes
+
+Each lane has one canonical artifact type `T` from extraction through merge,
+normalization, and typed validation. Module-facing Zone-B contracts are generic:
+
+- `Extractor[T]` produces typed per-chunk values plus framework-owned
+  provenance and diagnostics;
+- `Merger[T]` combines accepted values in source-chunk order;
+- `Normalizer[T]` canonicalizes the merged value; and
+- `TypedValidator[T]` applies semantic checks at its configured artifact stage.
+
+The framework may use private erased adapters to keep heterogeneous lanes in
+one resolved pipeline, but `any`, raw JSON, and a generic `Process(any)` API are
+not module-facing handoffs. The extractor selected for a lane establishes its
+artifact kind. Resolution uses that kind to select compatible merger,
+normalizer, validator, and codec variants and rejects an incompatible lane
+before any stage executes.
+
+Generic strategies remain reusable without knowing concrete domains. In
+particular, append-order merge is parameterized by a typed combine function
+provided during domain registration, and no-op normalization is instantiated
+for the lane's concrete type.
+
+### Artifact identity and codecs
+
+Every typed artifact kind has exactly one registered `ArtifactCodec[T]`. An
+artifact kind is a stable logical identifier, separate from a Go type name. A
+codec owns:
+
+- artifact kind;
+- schema identifier, name, and version;
+- media type and JSON Schema bytes; and
+- strict, deterministic encoding and decoding between `T` and the serialized
+  representation.
+
+Equal canonical values must encode to equal bytes. Those bytes are the basis
+for artifact digests. Codec decoding rejects malformed or schema-incompatible
+content. Domain validators continue to own semantic validity; codecs do not
+replace them.
+
+`SerializedArtifact` is the Zone-C representation and includes the artifact
+kind, schema metadata, media type, encoded content, and framework metadata.
+Type erasure occurs through the codec after normalization for final output.
+Intermediate checkpointing and opt-in debug recording may also use the codec,
+but serialization for those side effects is not a stage handoff.
+
+Checkpoint metadata records artifact kind, schema identifier, schema version,
+and schema digest. Reuse requires an exact compatible registered codec;
+otherwise the checkpoint is safely invalidated. Output remains domain-neutral
+and consumes serialized artifacts.
+
+Generic serialized validators remain supported for representation-level checks
+such as valid JSON and JSON Schema validation. The framework encodes `T` through
+its registered codec before invoking them. Domain validators receive `T`
+directly. Chunk-stage validators remain in the source zone: semantic chunk
+validators receive engine-owned chunks, while representation-level validators
+receive the framework's canonical serialized chunk view. They do not force
+source-zone values through a domain artifact codec.
+
+### Registration and resolution
+
+Registries expose typed registration helpers while privately retaining the Go
+type identity needed to assemble erased lane executors.
+
+- Codecs are keyed by artifact kind, with exactly one codec per kind.
+- Extractors are keyed by their existing module key and declare an artifact
+  kind.
+- Mergers, normalizers, and validators are keyed by `(module key, artifact
+  kind)`, allowing stable generic keys such as `appendorder` and `noop` to have
+  multiple typed specializations.
+- Resolved pipeline identity and dependency fingerprints include artifact kind
+  and schema identity, version, and digest.
+- Duplicate or incompatible registrations and selections fail deterministically
+  during composition or resolution.
+
+The framework's public typed registration surface uses free generic functions,
+because Go methods cannot declare their own type parameters. Private reflection
+may verify and erase registered types, but it is not exposed to module authors.
+
+### Preparation, options, and dependencies
+
+Pipeline execution is split into resolution, preparation, and running.
+Preparation constructs every selected module and validator before source input
+begins and returns a prepared pipeline with explicit input, chunk, lane, and
+output fields.
+
+- Construction receives framework-owned dependencies, including the one shared
+  scheduled structured-LLM client.
+- Raw configured options are decoded once into implementation-owned option
+  structs during preparation.
+- Missing dependencies, malformed options, unknown options, and incompatible
+  typed selections fail before stage execution.
+- Configuration validation uses the same option decoders without requiring live
+  provider dependencies.
+- Per-run data such as sources, chunks, references, session identity, lane
+  identity, and metadata remains in operation requests.
+- Constructed implementations that can be scheduled concurrently are immutable
+  after preparation or otherwise explicitly concurrency-safe.
+
+Modules and validators must not construct provider clients, wrap their own
+independent schedulers, or bypass the injected scheduled client.
+
+### D&D artifact model
+
+The D&D package root owns canonical `dnd.SpellList`, `dnd.SpellCast`, and
+related evidence types, using engine-owned `source.SourceRef` values. The spell
+extractor keeps its LLM response DTO and response schema private and maps the
+canonicalized response to the domain model.
+
+The D&D spell codec separately owns the existing durable spell artifact schema.
+The LLM response schema and durable artifact schema remain distinct contracts
+even if their current JSON shapes are similar. Shape, source-reference, and
+source-relatedness validators operate on the canonical typed model. The
+validator-only duplicate spell model and inter-stage JSON reparsing disappear.
+
+The migration preserves the existing D&D spell payload, logical output bundle,
+module and validator keys, prompt/schema identities, default validator chains,
+warnings, rejection semantics, and manifest provenance unless a separate
+compatibility decision explicitly changes one of those contracts.
+
+## Package Ownership
+
+The target production extension layout is:
+
+```text
+internal/modules/dnd/
+  types.go
+  codec/spells/
+  chunk/scenes/
+  extract/spells/
+  validate/spells/shape/
+  validate/spells/source_refs/
+  validate/spells/source_relatedness/
+  shared/
+  register/
+
+internal/modules/generic/
+  chunk/units/
+  merge/appendorder/
+  normalize/noop/
+  validate/always_accept/
+  validate/always_reject/
+  validate/valid_json/
+  validate/valid_json_schema/
+  output/json/
+  register/
+
+internal/modules/seriatim/
+  input/transcript/
+  register/
+
+internal/framework/promptfs/
+```
+
+Shared domain types live at the domain root. Registration lives in a sibling
+`register` package so that the root never imports child implementations. Each
+registrar exposes one composition entry point accepting the pipeline registry
+set and LLM asset registry. The CLI composition root creates those registries
+and invokes the generic, Seriatim, and D&D registrars.
+
+Concrete domain implementations do not import peer domains. Generic extensions
+never import a concrete domain. A domain registrar may import generic packages
+to register typed specializations for its domain. The application composition
+root and designated black-box integration tests may compose multiple
+registrars. Domain-neutral embedded prompt-asset filesystem support belongs to
+the framework rather than a domain package.
+
+## Concurrency Policy
+
+### Configuration
+
+The existing `concurrency.total_llm` setting remains the application-wide
+ceiling on actual provider calls. Version-2 configuration gains an extensible
+stage-worker map:
+
+```yaml
+concurrency:
+  total_llm: 4
+  stage_workers:
+    extract: 4
+```
+
+Initially, `extract` is the only recognized key. Unknown stage keys are rejected
+so misspellings cannot silently alter scheduling. If omitted, the effective
+extract worker count equals `total_llm`. Its valid range is
+`1..concurrency.total_llm`. The environment override is
+`NOTARIUS_STAGE_WORKERS_EXTRACT`; future stage overrides receive similarly
+explicit names that map to the extensible file representation.
+
+The worker setting bounds framework jobs, not provider calls. Only an actual
+LLM call consumes a permit from the shared scheduled client. The global
+scheduled client remains authoritative even if future stages gain worker limits.
+
+### Scheduling
+
+After pipeline-wide chunking, all lanes may run concurrently. A central
+dispatcher submits `(lane, chunk)` jobs to one run-wide extract worker pool in
+round-robin order: source chunk first, then resolved lane order. This avoids one
+unbounded goroutine per job and prevents an early lane from monopolizing the
+queue.
+
+One job contains extraction, its stage-local retry behavior, and extract-stage
+validation for that lane and chunk. Each lane begins its serial merge then
+normalize continuation when all of its extract jobs reach a terminal state.
+Different lanes' continuations may overlap, and any LLM-backed continuation or
+validator still shares the global scheduled client.
+
+Workers publish immutable task results to a coordinator. Only the coordinator
+mutates aggregate results, manifests, checkpoint indexes, warnings, and
+rejections. Debug artifacts use attempt-specific paths and do not rely on
+concurrent writes to shared files.
+
+Rejections do not cancel work. A framework error cancels the derived run
+context, stops undispatched jobs, and waits for started jobs to finish or
+observe cancellation. If the parent context was canceled, its error is
+returned. Otherwise, internal cancellation errors are ignored when at least one
+real framework error exists, and the primary returned error is selected from
+all started-task framework errors by this stable ordering:
+
+1. stage order: extract, merge, then normalize;
+2. resolved lane order;
+3. source chunk index for chunk-scoped work; and
+4. configured validator or operation order within that scope.
+
+The full per-task errors may be retained in opt-in diagnostics, but completion
+timing never chooses the public error. Output runs only after every lane reaches
+a successful or rejection-only terminal state and no framework error exists.
+
+Extractors and any validator instance callable by multiple workers must be safe
+for concurrent use. Production implementations should normally satisfy this by
+being immutable after preparation.
+
+## Compatibility and Safety
+
+- Existing production module keys, validator keys, profiles, default chains,
+  and maintained configurations continue to resolve.
+- Existing durable D&D JSON content and logical output paths remain unchanged.
+- Framework errors, validator rejections, retries, checkpoints, diagnostics,
+  and debug behavior retain their current semantics except for the explicitly
+  documented workspace-v2 compatibility boundary and deterministic concurrent
+  ordering.
+- All provider calls pass through the shared global scheduler, across lanes,
+  stages, retries, and validators.
+- Source text and LLM payloads remain subject to the existing opt-in debug and
+  sensitive-data handling policies.
+- Package moves do not create user-visible key changes or concrete cross-domain
+  dependencies.
+
+## Non-Goals
+
+This feature does not introduce:
+
+- a general DAG or configurable stage topology;
+- out-of-process plugins or an RPC extension protocol;
+- cross-lane normalization;
+- a new durable D&D spell schema merely to mirror internal Go types;
+- per-stage LLM permit pools that could exceed or partition the global ceiling;
+  or
+- concurrent work implemented through an unbounded goroutine per lane or chunk.
+
+## Completion Criteria
+
+The target state is reached when:
+
+- all production lanes use one typed artifact from extract through normalize
+  and typed validation;
+- codecs own schema-aware serialization at every type-erasure, checkpoint, and
+  debug boundary;
+- incompatible lane composition and invalid options fail before source work;
+- source units and chunks carry validated canonical provenance;
+- production extensions follow the domain-first package and registrar rules;
+- extract scheduling is bounded, deterministic, concurrent across lanes, and
+  race-free;
+- instrumented tests prove actual concurrent LLM calls never exceed
+  `concurrency.total_llm` across all callers;
+- the maintained D&D example and compatibility baselines retain their durable
+  contracts; and
+- current-behavior documentation is updated as each implemented boundary lands.

docs/roadmap/future.md

@@ -0,0 +1,50 @@
+# Future Work
+
+Current Notarius behavior is documented in the canonical README, CLI,
+configuration, operations, internal, and integration docs. This roadmap records
+future work only.
+
+## Candidate Product Work
+
+- Additional input adapters, such as Markdown or note-export formats.
+- Additional D&D extractors beyond spell casts.
+- Add non-file reference producers, such as prior-run artifacts, derived
+  summaries, or entity registries, without changing module-facing reference
+  item contracts.
+- Add token budgeting and model context-window management for reference content.
+- Add per-slot or per-chunk inclusion policies so modules can avoid repeating
+  large reference content in every prompt when that becomes important.
+- Add structured or parsed references, such as typed roster schemas, when a
+  module has a clear need for more than opaque UTF-8 text.
+- Add reference caching, preprocessing, summarization, embedding, or retrieval
+  if references become large enough to require preprocessing.
+- Cross-lane entity normalization.
+- Cross-chunk semantic deduplication.
+- Additional validator packages and production default chains for future
+  modules.
+- Production LLM-backed validators when there is a concrete review policy that
+  benefits from model judgment.
+- Validator diagnostics and timing summaries if operators need more detail than
+  the current [durable output bundle](../integrations/json-output.md) provides.
+- Media-type validators for non-JSON module outputs when such modules are
+  introduced.
+- Validator compatibility metadata if real deployments need config-time
+  enforcement that a validator is suitable for a specific stage or module.
+- Batching or context-window controls for LLM-backed validators if validator
+  inputs become large enough to require them.
+- Additional output encoders.
+
+## Candidate Operational Work
+
+- Packaged release artifacts for alpha distribution.
+- A documented versioning and release process.
+- Optional generated example output fixtures with a regeneration procedure.
+- Additional diagnostics or reporting views if operator workflows need them.
+
+## Candidate Workspace Work
+
+- Default-idempotent run behavior with an explicit force override.
+- Remote workspace storage.
+- Workspace garbage collection.
+- Workspace archival policy.
+- Cross-machine checkpoint reuse.

docs/roadmap/implementation.md

@@ -0,0 +1,453 @@
+# Domain-Typed Pipeline Implementation Roadmap
+
+## Status
+
+The domain-typed pipeline was implemented on 2026-07-17. A subsequent review
+identified five follow-up issues. The stages below are the decision-complete
+implementation plan for resolving them.
+
+Implement the stages in order. Keep each stage independently reviewable and
+leave the repository passing its full validation suite before beginning the
+next stage. Unless a stage explicitly says otherwise, preserve public CLI,
+configuration, module-key, validator-key, durable output, and checkpoint file
+contracts.
+
+Current architectural policy is defined by
+[Architecture](../policy/architecture.md). The design context remains in the
+[feature roadmap](domain.md) and
+[ADR-0002](../adr/0002-linear-pipes-and-filters-pipeline.md),
+[ADR-0003](../adr/0003-typed-interfaces-with-two-zone-data-model.md), and
+[ADR-0004](../adr/0004-package-modules-by-domain.md).
+
+## Delivered Baseline
+
+The existing implementation already provides:
+
+- domain-first production extensions and package-family registrars;
+- engine-owned source provenance using `source.SourceRef` and workspace schema
+  v2;
+- one domain-owned Go type through extraction, merge, normalization, and typed
+  validation;
+- schema-aware artifact codecs at checkpoint, debug, and output boundaries;
+- pre-execution typed resolution, option validation, and preparation;
+- one shared scheduled LLM client; and
+- bounded chunk-first, lane-second extraction with deterministic public
+  outcomes.
+
+The following work corrects checkpoint identity, completes retry debugging,
+removes kind-ambiguous registry lookup, strengthens architectural enforcement,
+and removes the obsolete sequential extraction path.
+
+## Implementation Rules
+
+Apply these rules to every stage:
+
+1. Read the task-specific documents listed in
+   [Development](../development.md) before changing the affected subsystem.
+2. Add focused regression tests that fail against the pre-stage code and pass
+   after the change.
+3. Preserve deterministic behavior. Do not base digests, public ordering,
+   reference resolution, or reported errors on Go map iteration or goroutine
+   completion order.
+4. Keep framework-owned type erasure private. Do not reintroduce module-facing
+   `any`, raw JSON handoffs, or a generic processing interface.
+5. Update current-behavior documentation in the same stage when externally
+   observable or documented internal behavior changes. Follow
+   [Documentation Policy](../policy/documentation.md); do not describe a later
+   stage as already implemented.
+6. Run focused tests while iterating. At the end of every stage, run:
+
+   ```sh
+   go test ./...
+   go test -race ./...
+   go vet ./...
+   go build ./cmd/notarius
+   git diff --check
+   ```
+
+## Stage 1: Include Resolved Validator Policy In Pipeline Identity
+
+### Goal
+
+Ensure that every effective validator-chain change alters the resolved
+pipeline digest and therefore prevents reuse of checkpoints created under a
+different validation policy.
+
+### Required Changes
+
+1. Extend `resolvedPipelineDigest` in
+   `internal/framework/pipeline/profile.go` to include the complete resolved
+   validator-chain collection. Include, for every chain:
+
+   - stage, lane ID, and owning module key;
+   - validator order;
+   - each complete resolved binding, including module key, LLM profile,
+     retries, options, and references;
+   - validator execution class;
+   - validator target; and
+   - artifact kind.
+
+2. Hash the already canonical `ResolvedPipeline.ValidatorChains` order produced
+   by resolution. Do not independently sort validators or otherwise weaken
+   configured order. Continue excluding only the digest field itself.
+3. Use the same deterministic JSON-and-SHA-256 mechanism as the existing
+   pipeline digest. Go map keys encoded inside bindings must retain the
+   deterministic ordering supplied by `encoding/json`.
+4. Do not add validator fingerprints separately to individual stage
+   dependencies. Pipeline/workspace identity is the authoritative invalidation
+   boundary for validation-policy changes.
+5. Do not advance the workspace schema version. The corrected digest naturally
+   selects a different checkpoint directory; existing checkpoints remain
+   intact and become reuse misses for the changed pipeline identity.
+
+### Tests
+
+Add focused tests under `internal/framework/pipeline` and, where useful,
+`internal/core/workspace` proving that:
+
+- registering a different default chain changes the resolved pipeline digest;
+- adding, removing, or reordering a default validator changes the digest;
+- changing a resolved validator binding option or LLM profile changes the
+  digest;
+- changing execution class, target, or artifact kind changes the digest;
+- resolving the same pipeline and catalog repeatedly produces the same digest;
+- an explicit empty override produces an empty resolved chain and differs from
+  a non-empty inherited default; and
+- a changed validator-chain digest produces a different checkpoint identity,
+  while an unchanged chain preserves it.
+
+Retain the existing tests proving that the digest field itself is excluded and
+that artifact schema identity participates in the digest.
+
+### Documentation
+
+Update the checkpoint invalidation description in `docs/operations.md` and the
+identity description in `docs/internal/pipeline.md` to state concisely that the
+effective resolved validator policy participates in pipeline identity.
+
+### Completion Gate
+
+A checkpoint accepted under one resolved default or explicit validator chain
+must not be reusable after that chain changes.
+
+## Stage 2: Complete Attempt-Scoped Debugging For Merge And Normalize
+
+### Goal
+
+Give merge and normalize retries the same attempt-level observability and
+nested LLM-call association already provided for chunk and extract attempts.
+
+### Required Changes
+
+1. In `internal/framework/pipeline/runner_typed.go`, create an attempt-specific
+   debug context before invoking each merge or normalize module. Pass that
+   context to both the module operation and its validation chain.
+2. Use these stable paths:
+
+   ```text
+   merge/<lane-id>/attempt-<NN>.json
+   merge/<lane-id>/attempt-<NN>/prompt-<NNNN>.json
+   merge/<lane-id>/attempt-<NN>/response-<NNNN>.json
+   merge/<lane-id>/attempt-<NN>/response-content-<NNNN>.<ext>
+
+   normalize/<lane-id>/attempt-<NN>.json
+   normalize/<lane-id>/attempt-<NN>/prompt-<NNNN>.json
+   normalize/<lane-id>/attempt-<NN>/response-<NNNN>.json
+   normalize/<lane-id>/attempt-<NN>/response-content-<NNNN>.<ext>
+   ```
+
+   Continue using two-digit retry attempt numbers and the existing debug path
+   sanitization and LLM call numbering behavior.
+3. Write one module-attempt envelope for every attempted merge and normalize
+   operation:
+
+   - on success, record the codec-backed candidate artifact and warnings that
+     will be promoted if the attempt is accepted;
+   - on validator rejection, record the rejection without promoting discarded
+     warnings;
+   - on module, validation, serialization, or debug failure, record the error;
+     and
+   - in all cases, attach the LLM calls recorded in the module attempt scope.
+
+4. Keep validator-specific debug scopes under the existing `validate/...`
+   hierarchy. A validator's LLM calls remain linked to its validator attempt;
+   the merge or normalize module envelope links only calls made by that module
+   attempt.
+5. Preserve the existing stage-level `input.json` and `output.json` artifacts.
+   Checkpoint reuse should continue to emit stage-level artifacts but should
+   not synthesize retry attempts that did not execute.
+6. Factor common attempt-envelope behavior into a small private helper where it
+   prevents chunk, extract, merge, and normalize instrumentation from drifting.
+   Do not introduce a new public runner abstraction solely for debugging.
+7. Treat any debug write failure as a framework error, consistent with current
+   debug policy.
+
+### Tests
+
+Add tests with instrumented LLM-backed fake mergers and normalizers proving
+that:
+
+- first-attempt success writes the expected attempt and nested LLM artifacts;
+- a failed first attempt followed by success writes two distinct attempt
+  envelopes and associates each call with the correct attempt;
+- module errors, validator errors, and final rejection are represented in the
+  corresponding attempt envelope;
+- validator LLM calls remain under validator paths rather than being attributed
+  to the module scope;
+- discarded-attempt warnings are not promoted;
+- checkpoint reuse produces no module-attempt files; and
+- no merge or normalize call falls back to an unscoped stage-name debug path.
+
+Extend the CLI debug integration test only as needed to verify the public debug
+directory layout. Keep most behavioral coverage in the pipeline package.
+
+### Documentation
+
+Update `docs/operations.md` if necessary to show the stable merge and normalize
+attempt paths. Update `docs/internal/pipeline.md` only where its implementation
+description needs clarification; its existing attempt-scoping guarantee should
+become fully true rather than be weakened.
+
+### Completion Gate
+
+Every executed merge and normalize retry must have a distinct debug envelope,
+and every LLM call made by that module attempt must be nested under and linked
+from that attempt.
+
+## Stage 3: Make Typed Variant Spec Lookup Kind-Specific
+
+### Goal
+
+Ensure that CLI reference-target discovery and other behavior-sensitive lookup
+select the merger or normalizer specification for the lane's actual artifact
+kind, never an arbitrary map entry.
+
+### Required Changes
+
+1. Add explicit kind-specific lookup methods to `MergerRegistry` and
+   `NormalizerRegistry`, named:
+
+   ```go
+   SpecForArtifact(key string, kind contracts.ArtifactKind) (ModuleSpec, bool)
+   ```
+
+   Normalize the key and artifact kind in the same way as typed registration
+   and return a cloned spec.
+2. Change CLI reference-target discovery in `internal/cli/run.go` to retain the
+   selected extractor's declared artifact kind and use it for merger and
+   normalizer spec lookup in that lane.
+3. A missing typed variant must produce a deterministic error naming the
+   pipeline, lane, stage, module key, requested artifact kind, and sorted
+   registered kinds, matching the quality of full pipeline resolution errors.
+4. Keep `Spec(key)` for kind-neutral catalog inspection and compatibility with
+   existing callers, but remove its map-order dependence. Select the first
+   registered artifact kind in sorted order before cloning its spec. Add a
+   comment making clear that behavior-sensitive code must use
+   `SpecForArtifact`.
+5. Do not require typed variants under one reusable key to expose identical
+   reference slots or capabilities. Their kind-specific specs are allowed to
+   differ, and resolution must consistently choose the matching variant.
+6. Audit all merger and normalizer `Spec` callers. Convert any caller making a
+   lane-specific decision to `SpecForArtifact`; leave only catalog or display
+   callers on the kind-neutral method.
+
+### Tests
+
+Register at least two artifact-kind variants under the same merger key and the
+same normalizer key with intentionally different reference slots. Prove that:
+
+- `SpecForArtifact` returns the correct cloned variant;
+- lookup is stable regardless of registration order;
+- CLI qualified and unqualified reference discovery uses the selected lane's
+  variant;
+- a reference accepted by one variant is not incorrectly accepted for another;
+- a missing variant reports sorted available kinds; and
+- repeated `Spec(key)` calls return the same deterministic catalog result.
+
+Retain coverage for the existing single-variant D&D catalog behavior.
+
+### Documentation
+
+Update `docs/internal/pipeline.md` or `docs/internal/modules.md` only if either
+currently describes registry lookup mechanics. No CLI or configuration syntax
+change is intended.
+
+### Completion Gate
+
+No behavior-sensitive merger or normalizer lookup may depend on map iteration,
+and CLI reference resolution must use the artifact kind selected by the lane's
+extractor.
+
+## Stage 4: Enforce Domain Import Boundaries Generically
+
+### Goal
+
+Make the repository guard enforce ADR-0004 for present and future module
+families without a hardcoded list of domain names or domain pairs.
+
+### Required Changes
+
+1. Refactor `internal/modules/import_boundaries_test.go` so that a module family
+   is derived from the first path segment under `internal/modules/`, rather than
+   recognized by a fixed `isDomain` list.
+2. Treat `generic` as the domain-neutral reusable extension family. Treat every
+   other production family, including `dnd`, `seriatim`, and future families,
+   as concrete for import-boundary purposes.
+3. Enforce these rules:
+
+   - a family root package must not import its own child implementation or
+     registrar packages;
+   - child packages within the same concrete family may import the family root,
+     shared helpers, or sibling implementations when needed;
+   - a concrete family must not import another concrete family;
+   - generic packages must not import concrete families;
+   - concrete implementation packages must not import generic implementation
+     packages directly;
+   - `internal/modules/<family>/register` may import its own family packages and
+     generic packages to compose typed strategies;
+   - the generic registrar may import generic child packages; and
+   - the application composition root and designated black-box integration
+     tests may compose multiple families.
+
+4. Exclude `internal/modules/integration` from production-family discovery.
+   Preserve its exemption only for `_test.go` black-box composition files; do
+   not create a blanket exemption for production Go files.
+5. Apply production import rules to white-box tests located in concrete module
+   packages. If an existing test composes concrete and generic implementations,
+   move that cross-family coverage to `internal/modules/integration` or replace
+   the foreign implementation with a package-local test double. Do not exempt
+   arbitrary `_test.go` files merely because they are tests.
+6. Keep the test based on parsed Go imports. Do not add a new build tool or
+   external dependency for this guard.
+
+### Tests
+
+Expand the table-driven import tests to cover:
+
+- a hypothetical future concrete family, demonstrating that no code change is
+  needed to enforce its boundaries;
+- generic-to-concrete rejection for both current and hypothetical families;
+- concrete-to-peer-concrete rejection;
+- concrete implementation-to-generic rejection;
+- concrete registrar-to-generic acceptance;
+- family-root-to-child rejection;
+- child-to-family-root and same-family sibling acceptance;
+- application composition-root acceptance; and
+- black-box integration-test acceptance without exempting non-test files.
+
+Run the guard against the complete current repository and confirm that no
+production package must be moved to satisfy it.
+
+### Documentation
+
+No ADR change is required. Update `docs/internal/modules.md` only if its package
+boundary description needs to name the registrar-only generic composition
+rule more clearly.
+
+### Completion Gate
+
+Adding a new directory under `internal/modules/<new-family>` must automatically
+receive the same cross-family and registrar enforcement as current production
+families.
+
+## Stage 5: Remove The Obsolete Sequential Extraction Path
+
+### Goal
+
+Make the runner's structure match the implemented concurrent architecture:
+the coordinator owns extraction, and a lane continuation begins from finalized
+extract results and performs only merge and normalize work.
+
+### Required Changes
+
+1. Replace `runTypedLane` with a continuation-oriented private function whose
+   input explicitly contains the finalized extraction state needed by merge and
+   normalize:
+
+   - accepted typed extract artifacts;
+   - serialized checkpoint artifacts;
+   - accepted warnings;
+   - rejected outputs; and
+   - the original extract checkpoint decision.
+
+   Use a private struct if it keeps the call boundary clear and avoids a long
+   positional parameter list.
+2. Change `continueLane` in `runner_concurrent.go` to pass the finalized state
+   directly. Do not make completed extraction look like checkpoint reuse.
+3. Remove:
+
+   - `completedExtractLoader`;
+   - the `RunInput.extractDecision` private override;
+   - the sequential extraction branch formerly contained in `runTypedLane`;
+     and
+   - duplicate extraction retry, validation, checkpoint, and debug logic made
+     unreachable by concurrent coordination.
+
+4. Keep extraction checkpoint loading and validation in `prepareLaneExtract`,
+   extract execution in `runExtractJob`, and deterministic final aggregation in
+   `finalizeLaneExtract`.
+5. Preserve existing behavior exactly:
+
+   - extract checkpoint events report the real loader decision;
+   - reused and freshly computed extract results enter continuation through the
+     same typed state;
+   - accepted artifacts reach merge in chunk-index order;
+   - warnings and rejections retain stable ordering and promotion semantics;
+   - a lane with no accepted extracts follows the current merge behavior;
+   - stage-level extract input/output debug artifacts remain unchanged; and
+   - failure classification and cancellation retain their deterministic scope.
+
+6. Keep merge and normalize serial within a lane and keep cross-lane
+   continuations bounded by the existing worker policy. Do not introduce a
+   goroutine per lane or chunk.
+
+### Tests
+
+Add or adjust focused runner tests proving parity for:
+
+- fresh extraction, fully reused extraction, and a mixture of accepted and
+  rejected chunk results;
+- deterministic extract ordering under reverse completion;
+- warning promotion across retries;
+- real checkpoint decision reporting for reused and recomputed extracts;
+- extract input/output and attempt debug paths;
+- framework cancellation and deterministic error selection; and
+- unchanged bounded worker and global LLM concurrency behavior.
+
+Use source search or a package-local compile-time assertion where practical to
+confirm there is only one extraction execution path and no remaining
+`completedExtractLoader` or `extractDecision` compatibility shim.
+
+### Documentation
+
+Update `docs/internal/pipeline.md` if its execution-flow description names the
+old continuation mechanism. This stage is an internal refactor and must not
+change operator or integration contracts.
+
+### Completion Gate
+
+The concurrent coordinator must be the only code path that executes extraction,
+and lane continuation must consume finalized extraction state without routing
+it through a synthetic checkpoint loader.
+
+## Final Verification And Closeout
+
+After all five stages:
+
+1. Run the full validation commands from this document on a clean worktree.
+2. Exercise the maintained D&D production example with both a fresh workspace
+   and checkpoint resume.
+3. Verify that changing the registered default spell validator chain selects a
+   different checkpoint identity.
+4. Verify merge and normalize attempt debug behavior with instrumented
+   LLM-backed test modules.
+5. Confirm current production imports satisfy the generic boundary guard.
+6. Re-read current-behavior documentation for statements made true or obsolete
+   by these stages.
+7. Replace this roadmap's status with a concise completion record only after all
+   stages and documentation updates have landed.
+
+## Open Questions
+
+None. The implementation choices required for these five remediation stages
+are specified above.

docs/roadmap/mvp.md

@@ -1,29 +0,0 @@
-# Future Work
-
-Current Notarius behavior is documented in the canonical README, CLI,
-configuration, operations, internal, and integration docs. This roadmap records
-future work only.
-
-## Candidate Product Work
-
-- Additional input adapters, such as Markdown or note-export formats.
-- Additional D&D extractors beyond spell casts.
-- Cross-lane entity normalization.
-- Cross-chunk semantic deduplication.
-- Configurable validator chains with production validator modules.
-- Multiple effective LLM profiles in one run.
-- Parallel execution where it preserves deterministic manifests and diagnostics.
-- Additional output encoders.
-
-## Candidate Operational Work
-
-- Packaged release artifacts for alpha distribution.
-- A documented versioning and release process.
-- Optional generated example output fixtures with a regeneration procedure.
-- Additional diagnostics or reporting views if operator workflows need them.
-
-## Non-Goals To Revisit Deliberately
-
-- A general workflow language.
-- Structural module selection through ad hoc run flags.
-- Storing secrets in config files, diagnostics, manifests, or examples.

docs/troubleshooting.md

@@ -1,215 +0,0 @@
-# Troubleshooting
-
-This guide maps common implemented failure modes to inspection steps and fixes.
-For command syntax, see [CLI Reference](cli.md). For YAML fields and
-environment overrides, see [Configuration](config.md). For output and
-diagnostics layout, see [Operations](operations.md).
-
-## Config File Not Found
-
-Symptom:
-
-```text
-notarius: config file not found; pass --config or set NOTARIUS_CONFIG
-```
-
-Fix:
-
-- Pass `--config path/to/config.yml`.
-- Or set `NOTARIUS_CONFIG` to a readable file.
-- Or install a config at `/usr/local/etc/notarius/config.yml`.
-
-If the message says the config path is a directory or is not available, correct
-the path or file permissions.
-
-## Unsupported Or Invalid Config
-
-Symptoms include:
-
-- `unsupported config version`
-- `config version is required`
-- `field <name> not found`
-- `total LLM concurrency must be greater than zero`
-- `diagnostics retention "<value>" is not supported`
-
-Fix:
-
-- Use `version: 1`.
-- Remove unknown YAML fields.
-- Validate with:
-
-```sh
-go run ./cmd/notarius config validate --config path/to/config.yml
-```
-
-## Unknown Pipeline
-
-Symptom:
-
-```text
-notarius: pipeline "..." is not configured
-```
-
-Fix:
-
-- List configured pipeline IDs:
-
-```sh
-go run ./cmd/notarius pipelines list --config path/to/config.yml
-```
-
-- Use one of those IDs in `notarius run <pipeline-id>`.
-- Check indentation under the top-level `pipelines` map.
-
-## Unknown Or Incompatible Module
-
-Symptoms mention a module key, pipeline slot, lane, capability, or `not
-registered`.
-
-Fix:
-
-- Validate the pipeline against the production module catalog:
-
-```sh
-go run ./cmd/notarius config validate \
-  --config path/to/config.yml \
-  --pipeline dnd-session
-```
-
-- Use only implemented production module keys listed in
-  [Configuration](config.md#implemented-production-modules).
-- Check that artifact lanes include an `extract` binding.
-
-## Invalid `--only`
-
-Symptoms include:
-
-- `--only must contain comma-separated non-empty artifact lane IDs`
-- `--only requires --pipeline`
-- `selected artifact lane`
-
-Fix:
-
-- Use comma-separated lane IDs with no empty entries:
-
-```sh
-go run ./cmd/notarius run dnd-session \
-  --config path/to/config.yml \
-  --input path/to/input.json \
-  --only spells
-```
-
-- For `config validate`, include `--pipeline` when using `--only`.
-- Confirm the lane ID exists under `pipelines.<id>.artifacts`.
-
-## Seriatim Input Validation Failure
-
-Symptoms include `seriatim input`, `parse JSON`, `segments must not be empty`,
-or validation errors naming a segment field.
-
-Fix:
-
-- Compare the input to
-  [examples/seriatim-minimal-transcript.json](../examples/seriatim-minimal-transcript.json).
-- Ensure the JSON has a `metadata` object and a non-empty `segments` array.
-- Each segment needs a non-empty `id`, non-empty `speaker`, non-empty `text`,
-  non-negative numeric `start`, and non-negative numeric `end`.
-- Segment IDs must be unique and must not contain leading or trailing
-  whitespace.
-- `end` must be greater than or equal to `start`.
-
-## Missing LLM Base URL Or Model
-
-Symptoms include:
-
-- `LLM profile "default" base URL must not be empty`
-- `LLM profile "default" model must not be empty`
-- `base URL must be valid`
-
-Fix:
-
-- Set `base_url` and `model` in `llm_profiles.default`.
-- Or set `NOTARIUS_LLM_DEFAULT_BASE_URL` and
-  `NOTARIUS_LLM_DEFAULT_MODEL`.
-- If a profile needs authentication, set `api_key_env` in YAML or set
-  `NOTARIUS_LLM_DEFAULT_API_KEY`.
-
-## LLM Profile Override Failure
-
-Symptom:
-
-```text
-notarius: LLM profile override "..." is not configured
-```
-
-Fix:
-
-- Add the profile under `llm_profiles`.
-- Or use an existing profile ID with `--llm-profile`.
-
-Current runs require exactly one distinct effective LLM profile. If a pipeline
-uses several profiles, run with `--llm-profile <id>` or align the bindings in
-configuration.
-
-## Provider HTTP Or Response Failure
-
-Symptoms include:
-
-- `provider request failed`
-- `provider returned status 400`
-- `provider returned status 403`
-- `provider response missing choices`
-- `provider response assistant message content is not valid JSON`
-- `decode structured output`
-
-Fix:
-
-- Confirm the `base_url` points to an OpenAI-compatible endpoint root. Notarius
-  posts to `<base_url>/chat/completions`.
-- Check `model` and provider credentials.
-- Inspect the retained diagnostics `error.log`.
-- For 400 and 403 responses, fix the request configuration or credentials.
-- For 429 and 5xx responses, the client retries according to `max_retries`; if
-  the failure persists, inspect the provider response and adjust capacity,
-  credentials, or model settings.
-- The assistant message content must decode as JSON matching the extractor's
-  structured response schema.
-
-Provider error messages are redacted for configured API key values.
-
-## Output Write Failure
-
-Symptoms include:
-
-- `create output directory`
-- `write output file`
-- `output file name must`
-
-Fix:
-
-- Ensure `--output-dir` points to a directory path or a path that can be
-  created.
-- Check filesystem permissions and available disk space.
-- If diagnostics were retained, inspect `run-report.json`, `run-manifest.json`,
-  and `error.log`.
-
-The CLI rejects unsafe logical output paths before writing files.
-
-## Diagnostics Directory Surprise
-
-Symptom: the diagnostics directory is missing after a successful run.
-
-Fix:
-
-- Check `diagnostics.retention`.
-- With `auto`, successful runs without warnings are removed.
-- Use `diagnostics.retention: always` when every diagnostics run directory
-  should be kept.
-- Use `--diagnostics-dir` to override the configured work directory for a run.
-
-Symptom: diagnostics exist even with `retention: never`.
-
-Explanation:
-
-- Failed runs are retained so that `error.log` and available context can be
-  inspected.

examples/dnd-spells-glossary.txt

@@ -0,0 +1,2 @@
+Cure Wounds: healing spell cast by touch.
+Shield: defensive reaction spell.

examples/dnd-spells-production.config.yml

@@ -0,0 +1,27 @@
+version: 2
+concurrency:
+  total_llm: 1
+  stage_workers:
+    extract: 1
+workspace:
+  directory: /var/lib/notarius
+  diagnostics:
+    enabled: true
+    retention: auto
+  resume:
+    enabled: false
+  debug:
+    enabled: false
+pipelines:
+  dnd-session:
+    input: seriatim
+    references:
+      party: ./dnd-spells-roster.txt
+      glossary: ./dnd-spells-glossary.txt
+    chunk:
+      module: generic
+      options:
+        max_units: 50
+    artifacts:
+      spells:
+        extract: dnd/spells

examples/dnd-spells-roster.txt

@@ -0,0 +1,3 @@
+Aria: party cleric and recurring healer.
+Borin: fighter ally.
+Bandit mage: hostile spellcaster.

examples/dnd-spells.config.yml

@@ -1,16 +1,7 @@
-version: 1
-llm_profiles:
-  default:
-    provider: openai-compatible
-    base_url: http://127.0.0.1:1
-    model: fake-model
+version: 2
 pipelines:
   dnd-session:
     input: seriatim
-    chunk:
-      module: generic
-      options:
-        max_units: 50
     artifacts:
       spells:
         extract: dnd/spells

examples/seriatim-minimal-transcript.json

@@ -5,14 +5,14 @@
   },
   "segments": [
     {
-      "id": "seg-001",
+      "id": 1,
       "start": 0,
       "end": 4,
       "speaker": "Aria",
       "text": "Aria raises her holy symbol and casts Cure Wounds."
     },
     {
-      "id": "seg-002",
+      "id": 2,
       "start": 4,
       "end": 8,
       "speaker": "DM",

go.mod

@@ -1,5 +1,11 @@
 module gitea.maximumdirect.net/eric/notarius
 
-go 1.24.0
+go 1.25.5
 
-require gopkg.in/yaml.v3 v3.0.1
+require (
+	gitea.maximumdirect.net/eric/scriptorium v0.11.0
+	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require golang.org/x/text v0.14.0 // indirect

go.sum

@@ -1,3 +1,11 @@
+gitea.maximumdirect.net/eric/scriptorium v0.11.0 h1:rjvbt9FTaWHxYlHq7QlUzmMVUt3QdbTmeCkmH81N//o=
+gitea.maximumdirect.net/eric/scriptorium v0.11.0/go.mod h1:FQ5lEuNxmrQyNgIomkpZdxvfTC0jWjbXYuq3tbJWF64=
+github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
+github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 h1:KRzFb2m7YtdldCEkzs6KqmJw4nqEVZGK7IN2kJkjTuQ=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.2/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/cli/catalog.go

@@ -3,50 +3,54 @@ package cli
 import (
 	"context"
 	"fmt"
-	"strings"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
 	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/chunk/generic"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/extract/dnd/spells"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/input/seriatim"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/merge/appendorder"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/normalize/noop"
-	jsonoutput "gitea.maximumdirect.net/eric/notarius/internal/modules/output/json"
+	dndregister "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/register"
+	genericregister "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/register"
+	seriatimregister "gitea.maximumdirect.net/eric/notarius/internal/modules/seriatim/register"
 )
 
-func productionRegistries() (pipeline.Registries, error) {
+type productionComponents struct {
+	registries pipeline.Registries
+	assets     *llm.AssetRegistry
+}
+
+func newProductionComponents() (productionComponents, error) {
 	registries := pipeline.Registries{
-		Inputs:      pipeline.NewInputAdapterRegistry(),
-		Chunkers:    pipeline.NewChunkerRegistry(),
-		Extractors:  pipeline.NewExtractorRegistry(),
-		Mergers:     pipeline.NewMergerRegistry(),
-		Normalizers: pipeline.NewNormalizerRegistry(),
-		Validators:  pipeline.NewValidatorRegistry(),
-		Outputs:     pipeline.NewOutputEncoderRegistry(),
+		Inputs:          pipeline.NewInputAdapterRegistry(),
+		Chunkers:        pipeline.NewChunkerRegistry(),
+		ArtifactCodecs:  pipeline.NewArtifactCodecRegistry(),
+		Extractors:      pipeline.NewExtractorRegistry(),
+		Mergers:         pipeline.NewMergerRegistry(),
+		Normalizers:     pipeline.NewNormalizerRegistry(),
+		Validators:      pipeline.NewValidatorRegistry(),
+		ValidatorChains: pipeline.NewValidatorChainRegistry(),
+		Outputs:         pipeline.NewOutputEncoderRegistry(),
 	}
-	if err := seriatim.Register(registries.Inputs); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register seriatim input: %w", err)
+	assets := llm.NewAssetRegistry()
+	registrars := []struct {
+		name     string
+		register func(pipeline.Registries, *llm.AssetRegistry) error
+	}{
+		{name: "generic", register: genericregister.Register},
+		{name: "seriatim", register: seriatimregister.Register},
+		{name: "dnd", register: dndregister.Register},
 	}
-	if err := generic.Register(registries.Chunkers); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register generic chunker: %w", err)
+	for _, registrar := range registrars {
+		if err := registrar.register(registries, assets); err != nil {
+			return productionComponents{}, fmt.Errorf("register %s module family: %w", registrar.name, err)
+		}
 	}
-	if err := spells.Register(registries.Extractors); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register dnd spells extractor: %w", err)
-	}
-	if err := appendorder.Register(registries.Mergers); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register appendorder merger: %w", err)
-	}
-	if err := noop.Register(registries.Normalizers); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register noop normalizer: %w", err)
-	}
-	if err := jsonoutput.Register(registries.Outputs); err != nil {
-		return pipeline.Registries{}, fmt.Errorf("register json output encoder: %w", err)
-	}
-	return registries, nil
+	return productionComponents{registries: registries, assets: assets}, nil
+}
+
+func productionRegistries() (pipeline.Registries, error) {
+	components, err := newProductionComponents()
+	return components.registries, err
 }
 
 func productionCatalog() (pipeline.ModuleCatalog, error) {
@@ -57,6 +61,11 @@ func productionCatalog() (pipeline.ModuleCatalog, error) {
 	return catalogFromRegistries(registries), nil
 }
 
+func productionPromptAssets() (*llm.AssetRegistry, error) {
+	components, err := newProductionComponents()
+	return components.assets, err
+}
+
 func effectiveCatalog(opts Options) (pipeline.ModuleCatalog, error) {
 	if !isEmptyCatalog(opts.Catalog) {
 		return opts.Catalog, nil
@@ -79,45 +88,53 @@ func effectiveRegistries(opts Options) (pipeline.Registries, error) {
 
 func catalogFromRegistries(registries pipeline.Registries) pipeline.ModuleCatalog {
 	return pipeline.ModuleCatalog{
-		Inputs:      registries.Inputs,
-		Chunkers:    registries.Chunkers,
-		Extractors:  registries.Extractors,
-		Mergers:     registries.Mergers,
-		Normalizers: registries.Normalizers,
-		Validators:  registries.Validators,
-		Outputs:     registries.Outputs,
+		Inputs:          registries.Inputs,
+		Chunkers:        registries.Chunkers,
+		ArtifactCodecs:  registries.ArtifactCodecs,
+		Extractors:      registries.Extractors,
+		Mergers:         registries.Mergers,
+		Normalizers:     registries.Normalizers,
+		Validators:      registries.Validators,
+		ValidatorChains: registries.ValidatorChains,
+		Outputs:         registries.Outputs,
 	}
 }
 
 func registriesFromCatalog(catalog pipeline.ModuleCatalog) pipeline.Registries {
 	return pipeline.Registries{
-		Inputs:      catalog.Inputs,
-		Chunkers:    catalog.Chunkers,
-		Extractors:  catalog.Extractors,
-		Mergers:     catalog.Mergers,
-		Normalizers: catalog.Normalizers,
-		Validators:  catalog.Validators,
-		Outputs:     catalog.Outputs,
+		Inputs:          catalog.Inputs,
+		Chunkers:        catalog.Chunkers,
+		ArtifactCodecs:  catalog.ArtifactCodecs,
+		Extractors:      catalog.Extractors,
+		Mergers:         catalog.Mergers,
+		Normalizers:     catalog.Normalizers,
+		Validators:      catalog.Validators,
+		ValidatorChains: catalog.ValidatorChains,
+		Outputs:         catalog.Outputs,
 	}
 }
 
 func isEmptyCatalog(catalog pipeline.ModuleCatalog) bool {
 	return catalog.Inputs == nil &&
 		catalog.Chunkers == nil &&
+		catalog.ArtifactCodecs == nil &&
 		catalog.Extractors == nil &&
 		catalog.Mergers == nil &&
 		catalog.Normalizers == nil &&
 		catalog.Validators == nil &&
+		catalog.ValidatorChains == nil &&
 		catalog.Outputs == nil
 }
 
 func isEmptyRegistries(registries pipeline.Registries) bool {
 	return registries.Inputs == nil &&
 		registries.Chunkers == nil &&
+		registries.ArtifactCodecs == nil &&
 		registries.Extractors == nil &&
 		registries.Mergers == nil &&
 		registries.Normalizers == nil &&
 		registries.Validators == nil &&
+		registries.ValidatorChains == nil &&
 		registries.Outputs == nil
 }
 
@@ -125,48 +142,39 @@ func productionLLMClientFactory(ctx context.Context, cfg config.Config, profileI
 	if err := ctx.Err(); err != nil {
 		return nil, nil, err
 	}
-	trimmedID := strings.TrimSpace(profileID)
-	if trimmedID == "" {
-		trimmedID = pipeline.DefaultLLMProfile
-	}
-
-	profile, ok := cfg.LLMProfile(trimmedID)
-	if !ok {
-		return nil, nil, fmt.Errorf("LLM profile %q is not configured", trimmedID)
-	}
-	clientCfg, err := cfg.OpenAICompatibleClientConfig(trimmedID)
+	assets, err := productionPromptAssets()
 	if err != nil {
 		return nil, nil, err
 	}
-	client, err := llm.NewOpenAICompatibleClient(clientCfg)
-	if err != nil {
-		return nil, nil, fmt.Errorf("create LLM client for profile %q: %w", trimmedID, err)
-	}
-
-	scheduler, err := llm.NewScheduler(effectiveLLMConcurrency(cfg, profile))
-	if err != nil {
-		return nil, nil, fmt.Errorf("create LLM scheduler for profile %q: %w", trimmedID, err)
-	}
-	provider := strings.TrimSpace(profile.Provider)
-	if provider == "" {
-		provider = "openai-compatible"
-	}
-	metadata := []artifacts.LLMProfileManifest{
-		{
-			ID:       trimmedID,
-			Provider: provider,
-			Model:    strings.TrimSpace(profile.Model),
-		},
-	}
-	return llm.NewScheduledClient(client, scheduler), metadata, nil
+	return buildProductionLLMClient(ctx, cfg, profileID, assets)
 }
 
-func effectiveLLMConcurrency(cfg config.Config, profile config.LLMProfile) int {
-	if profile.MaxConcurrency > 0 {
-		return profile.MaxConcurrency
+func productionLLMClientFactoryWithAssets(assets *llm.AssetRegistry) LLMClientFactory {
+	return func(ctx context.Context, cfg config.Config, profileID string) (contracts.StructuredLLMClient, []artifacts.LLMProfileManifest, error) {
+		return buildProductionLLMClient(ctx, cfg, profileID, assets)
 	}
-	if cfg.Concurrency.TotalLLM > 0 {
-		return cfg.Concurrency.TotalLLM
-	}
-	return 1
+}
+
+func buildProductionLLMClient(ctx context.Context, cfg config.Config, profileID string, assets *llm.AssetRegistry) (contracts.StructuredLLMClient, []artifacts.LLMProfileManifest, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, nil, err
+	}
+	if assets == nil {
+		return nil, nil, fmt.Errorf("production asset registry must not be nil")
+	}
+	recorder := llm.NewLLMProfileRecorder()
+	client, err := llm.NewScriptoriumClient(llm.ScriptoriumClientConfig{
+		ProfileDir:  cfg.Scriptorium.ProfileDir,
+		ProfileFile: cfg.Scriptorium.ProfileFile,
+		Assets:      assets,
+		Recorder:    recorder,
+	})
+	if err != nil {
+		return nil, nil, fmt.Errorf("create Scriptorium-backed LLM client: %w", err)
+	}
+	scheduler, err := llm.NewScheduler(cfg.Concurrency.TotalLLM)
+	if err != nil {
+		return nil, nil, fmt.Errorf("create LLM scheduler: %w", err)
+	}
+	return llm.NewScheduledClient(client, scheduler), nil, nil
 }

internal/cli/compatibility_test.go

@@ -0,0 +1,600 @@
+package cli
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io/fs"
+	"path/filepath"
+	"reflect"
+	"sort"
+	"strings"
+	"sync"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	frameworkllm "gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/chunk/scenes"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
+	spellshape "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/shape"
+	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_refs"
+	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_relatedness"
+	validjson "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json"
+	validjsonschema "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json_schema"
+)
+
+func TestProductionCompatibilitySnapshot(t *testing.T) {
+	normalizedOptions, err := normalizeOptions(Options{})
+	if err != nil {
+		t.Fatalf("normalizeOptions() error = %v, want nil", err)
+	}
+	if normalizedOptions.Catalog.Inputs != normalizedOptions.Registries.Inputs ||
+		normalizedOptions.Catalog.Chunkers != normalizedOptions.Registries.Chunkers ||
+		normalizedOptions.Catalog.Extractors != normalizedOptions.Registries.Extractors ||
+		normalizedOptions.Catalog.Mergers != normalizedOptions.Registries.Mergers ||
+		normalizedOptions.Catalog.Normalizers != normalizedOptions.Registries.Normalizers ||
+		normalizedOptions.Catalog.Validators != normalizedOptions.Registries.Validators ||
+		normalizedOptions.Catalog.ValidatorChains != normalizedOptions.Registries.ValidatorChains ||
+		normalizedOptions.Catalog.Outputs != normalizedOptions.Registries.Outputs {
+		t.Fatal("production catalog and execution registries do not share one composition")
+	}
+	if normalizedOptions.LLMClientFactory == nil {
+		t.Fatal("production LLM client factory is nil")
+	}
+
+	registries, err := productionRegistries()
+	if err != nil {
+		t.Fatalf("productionRegistries() error = %v, want nil", err)
+	}
+
+	keySnapshots := []struct {
+		name string
+		got  []string
+		want []string
+	}{
+		{name: "inputs", got: registries.Inputs.RegisteredKeys(), want: []string{"seriatim"}},
+		{name: "chunkers", got: registries.Chunkers.RegisteredKeys(), want: []string{"dnd/scenes", "generic"}},
+		{name: "extractors", got: registries.Extractors.RegisteredKeys(), want: []string{"dnd/spells"}},
+		{name: "mergers", got: registries.Mergers.RegisteredKeys(), want: []string{"appendorder"}},
+		{name: "normalizers", got: registries.Normalizers.RegisteredKeys(), want: []string{"noop"}},
+		{name: "validators", got: registries.Validators.RegisteredKeys(), want: []string{
+			"extract/dnd/spells/shape", "extract/dnd/spells/source_refs", "extract/dnd/spells/source_relatedness",
+			"generic/always_accept", "generic/always_reject", "generic/valid_json", "generic/valid_json_schema",
+		}},
+		{name: "outputs", got: registries.Outputs.RegisteredKeys(), want: []string{"json"}},
+	}
+	for _, snapshot := range keySnapshots {
+		t.Run(snapshot.name, func(t *testing.T) {
+			if !reflect.DeepEqual(snapshot.got, snapshot.want) {
+				t.Fatalf("registered keys = %#v, want compatibility snapshot %#v", snapshot.got, snapshot.want)
+			}
+		})
+	}
+
+	wantChain := []pipeline.ModuleBinding{
+		pipeline.Binding(validjson.Key),
+		pipeline.Binding(validjsonschema.Key),
+		pipeline.Binding(spellshape.Key),
+		pipeline.Binding(spellsourcerefs.Key),
+		pipeline.Binding(spellrelatedness.Key),
+	}
+	if got := registries.ValidatorChains.Validators(pipeline.StageExtract, spells.Key); !reflect.DeepEqual(got, wantChain) {
+		t.Fatalf("spell validator chain = %#v, want compatibility snapshot %#v", got, wantChain)
+	}
+
+	assets, err := productionPromptAssets()
+	if err != nil {
+		t.Fatalf("productionPromptAssets() error = %v, want nil", err)
+	}
+	assertAssetNames(t, assets.PromptFS, []string{
+		"dnd.scenes/dnd.scenes.yaml",
+		"dnd.scenes/instructions.md",
+		"dnd.scenes/sharedassets/common-dnd-references.md",
+		"dnd.scenes/sharedassets/common-dnd-system.md",
+		"dnd.scenes/sharedassets/common-dnd-transcript.md",
+		"dnd.scenes/task.md",
+		"dnd.spells/dnd.spells.yaml",
+		"dnd.spells/instructions.md",
+		"dnd.spells/sharedassets/common-dnd-references.md",
+		"dnd.spells/sharedassets/common-dnd-system.md",
+		"dnd.spells/sharedassets/common-dnd-transcript.md",
+		"dnd.spells/task.md",
+	})
+	assertAssetNames(t, assets.SchemaFS, []string{
+		"dnd_scenes.v1.json",
+		"dnd_spells_llm.v1.json",
+	})
+
+	identitySnapshot := map[string]map[string]any{
+		"scenes": sceneManifestMetadata(t),
+		"spells": spellManifestMetadata(t),
+	}
+	for name, metadata := range identitySnapshot {
+		for _, key := range []string{"prompt_id", "prompt_version", "prompt_sha256", "response_schema_key", "response_schema_id", "response_schema_name", "response_schema_version", "response_schema_sha256"} {
+			if value, ok := metadata[key].(string); !ok || value == "" {
+				t.Fatalf("%s metadata[%q] = %#v, want non-empty identity", name, key, metadata[key])
+			}
+		}
+	}
+	if got := []any{
+		identitySnapshot["scenes"]["prompt_id"], identitySnapshot["scenes"]["prompt_version"],
+		identitySnapshot["scenes"]["response_schema_key"], identitySnapshot["scenes"]["response_schema_id"], identitySnapshot["scenes"]["response_schema_name"], identitySnapshot["scenes"]["response_schema_version"],
+	}; !reflect.DeepEqual(got, []any{"dnd.scenes", "v1", "dnd_scenes", "notarius.dnd.scenes", "notarius_dnd_scenes_v1", "v1"}) {
+		t.Fatalf("scene identities = %#v, want compatibility snapshot", got)
+	}
+	if got := []any{
+		identitySnapshot["spells"]["prompt_id"], identitySnapshot["spells"]["prompt_version"],
+		identitySnapshot["spells"]["response_schema_key"], identitySnapshot["spells"]["response_schema_id"], identitySnapshot["spells"]["response_schema_name"], identitySnapshot["spells"]["response_schema_version"],
+	}; !reflect.DeepEqual(got, []any{"dnd.spells", "v1", "dnd_spells", "notarius.dnd.spells", "notarius_dnd_spells_v1", "v1"}) {
+		t.Fatalf("spell identities = %#v, want compatibility snapshot", got)
+	}
+
+	fileConfig, err := config.LoadFileConfig(fixturePath(t, "examples/dnd-spells.config.yml"))
+	if err != nil {
+		t.Fatalf("LoadFileConfig() error = %v, want nil", err)
+	}
+	cfg := config.Default()
+	if err := cfg.ApplyFileConfig(fileConfig); err != nil {
+		t.Fatalf("ApplyFileConfig() error = %v, want nil", err)
+	}
+	effective, err := cfg.Resolve(config.ResolveInput{PipelineID: "dnd-session", Catalog: catalogFromRegistries(registries)})
+	if err != nil {
+		t.Fatalf("Resolve() error = %v, want nil", err)
+	}
+	resolved := effective.ResolvedPipeline
+	if resolved.Input.Module != "seriatim" || resolved.Chunk.Module != "generic" || resolved.Output.Module != "json" || len(resolved.ArtifactLanes) != 1 {
+		t.Fatalf("resolved example = %#v, want maintained production topology", resolved)
+	}
+	lane := resolved.ArtifactLanes[0]
+	if lane.ID != "spells" || lane.Extract.Module != "dnd/spells" || lane.Merge.Module != "appendorder" || lane.Normalize.Module != "noop" {
+		t.Fatalf("resolved lane = %#v, want maintained spell lane", lane)
+	}
+	if got := resolvedValidatorKeys(resolved.ValidatorChains, pipeline.StageExtract, "spells", spells.Key); !reflect.DeepEqual(got, []string{
+		"generic/valid_json", "generic/valid_json_schema", "extract/dnd/spells/shape", "extract/dnd/spells/source_refs", "extract/dnd/spells/source_relatedness",
+	}) {
+		t.Fatalf("resolved validator keys = %#v, want compatibility snapshot", got)
+	}
+
+	productionFileConfig, err := config.LoadFileConfig(fixturePath(t, "examples/dnd-spells-production.config.yml"))
+	if err != nil {
+		t.Fatalf("LoadFileConfig(production example) error = %v, want nil", err)
+	}
+	productionConfig := config.Default()
+	if err := productionConfig.ApplyFileConfig(productionFileConfig); err != nil {
+		t.Fatalf("ApplyFileConfig(production example) error = %v, want nil", err)
+	}
+	productionEffective, err := productionConfig.Resolve(config.ResolveInput{PipelineID: "dnd-session", Catalog: catalogFromRegistries(registries)})
+	if err != nil {
+		t.Fatalf("Resolve(production example) error = %v, want nil", err)
+	}
+	productionResolved := productionEffective.ResolvedPipeline
+	if productionConfig.Concurrency.TotalLLM != 1 || productionConfig.Concurrency.StageWorkers["extract"] != 1 || !reflect.DeepEqual(productionResolved.Chunk.Options, map[string]any{"max_units": 50}) {
+		t.Fatalf("production example concurrency/options = %#v/%#v, want compatibility snapshot", productionConfig.Concurrency, productionResolved.Chunk.Options)
+	}
+	bindings := productionResolved.ArtifactLanes[0].ExtractReferences.Bindings
+	if len(bindings) != 2 || bindings[0].SlotName != "glossary" || bindings[0].Source != "./dnd-spells-glossary.txt" || bindings[1].SlotName != "party" || bindings[1].Source != "./dnd-spells-roster.txt" {
+		t.Fatalf("production example reference bindings = %#v, want maintained glossary and party bindings", bindings)
+	}
+}
+
+func TestMaintainedSeriatimToDNDCompatibilityBundle(t *testing.T) {
+	tests := []struct {
+		name              string
+		client            contracts.StructuredLLMClient
+		wantStatus        string
+		wantLaneFile      bool
+		wantRejectedCount int
+	}{
+		{name: "approved", client: newFakeRunLLMClient(false), wantStatus: "approved", wantLaneFile: true},
+		{name: "validator rejection is nonfatal", client: newFakeRunLLMClient(true), wantStatus: "rejected", wantRejectedCount: 1},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			outputDir := t.TempDir()
+			var stdout bytes.Buffer
+			var stderr bytes.Buffer
+			code := RunWithOptions([]string{
+				"run", "dnd-session",
+				"--config", fixturePath(t, "examples/dnd-spells.config.yml"),
+				"--input", fixturePath(t, "examples/seriatim-minimal-transcript.json"),
+				"--output-dir", outputDir,
+				"--diagnostics-dir", t.TempDir(),
+			}, &stdout, &stderr, Options{LLMClientFactory: fakeLLMFactory(test.client, nil)})
+			if code != 0 {
+				t.Fatalf("RunWithOptions() code = %d, stderr=%q", code, stderr.String())
+			}
+
+			runDir := onlyChildDir(t, outputDir)
+			wantFiles := []string{"index.json", "manifest.json", "rejected.json", "warnings.json"}
+			if test.wantLaneFile {
+				wantFiles = append(wantFiles, "lanes/spells.json")
+			}
+			sort.Strings(wantFiles)
+			if got := relativeFileNames(t, runDir); !reflect.DeepEqual(got, wantFiles) {
+				t.Fatalf("durable files = %#v, want compatibility snapshot %#v", got, wantFiles)
+			}
+
+			var manifest artifacts.RunManifest
+			readJSONFile(t, filepath.Join(runDir, "manifest.json"), &manifest)
+			if manifest.PipelineID != "dnd-session" || manifest.InputModule != "seriatim" || manifest.Chunker != "generic" || manifest.OutputEncoder != "json" {
+				t.Fatalf("manifest module provenance = %#v, want maintained production modules", manifest)
+			}
+			if len(manifest.ArtifactLanes) != 1 || manifest.ArtifactLanes[0].ID != "spells" {
+				t.Fatalf("artifact lanes = %#v, want one spells lane", manifest.ArtifactLanes)
+			}
+			laneManifest := manifest.ArtifactLanes[0]
+			if laneManifest.Extractor != "dnd/spells" || laneManifest.Merger != "appendorder" || laneManifest.Normalizer != "noop" {
+				t.Fatalf("manifest lane module provenance = %#v, want maintained production modules", laneManifest)
+			}
+			if len(manifest.Extractors) != 0 || manifest.Merger != "" || manifest.Normalizer != "" {
+				t.Fatalf("legacy top-level lane summaries = %#v/%q/%q, want empty compatibility snapshot", manifest.Extractors, manifest.Merger, manifest.Normalizer)
+			}
+			if manifest.ValidationStatus != test.wantStatus || len(manifest.RejectedOutputs) != test.wantRejectedCount {
+				t.Fatalf("manifest outcome = status %q rejected %#v, want %q/%d", manifest.ValidationStatus, manifest.RejectedOutputs, test.wantStatus, test.wantRejectedCount)
+			}
+			if !reflect.DeepEqual(manifest.SourceDigests, []string{"sha256:1c98d94ae632fb10a2b56f684cd4fb1019cedb1a629e57dc0977cf4a54135be0"}) {
+				t.Fatalf("source digests = %#v, want maintained fixture provenance", manifest.SourceDigests)
+			}
+			if got := manifestValidatorKeys(manifestValidatorChain(t, manifest, pipeline.StageExtract, "spells", spells.Key)); !reflect.DeepEqual(got, []string{
+				"generic/valid_json", "generic/valid_json_schema", "extract/dnd/spells/shape", "extract/dnd/spells/source_refs", "extract/dnd/spells/source_relatedness",
+			}) {
+				t.Fatalf("manifest validator chain = %#v, want compatibility snapshot", got)
+			}
+
+			var index struct {
+				ManifestFile string `json:"manifest_file"`
+				OutputFiles  []struct {
+					LaneID        string `json:"lane_id"`
+					MediaType     string `json:"media_type"`
+					File          string `json:"file"`
+					ModuleKey     string `json:"module_key"`
+					SchemaID      string `json:"schema_id"`
+					SchemaName    string `json:"schema_name"`
+					SchemaVersion string `json:"schema_version"`
+				} `json:"output_files"`
+				RejectedFile string `json:"rejected_file"`
+				WarningsFile string `json:"warnings_file"`
+			}
+			readJSONFile(t, filepath.Join(runDir, "index.json"), &index)
+			if index.ManifestFile != "manifest.json" || index.RejectedFile != "rejected.json" || index.WarningsFile != "warnings.json" {
+				t.Fatalf("output index fixed files = %#v, want compatibility snapshot", index)
+			}
+			if test.wantLaneFile {
+				if len(index.OutputFiles) != 1 {
+					t.Fatalf("output index entries = %#v, want one", index.OutputFiles)
+				}
+				wantOutput := struct {
+					LaneID, MediaType, File, ModuleKey, SchemaID, SchemaName, SchemaVersion string
+				}{"spells", "application/json", "lanes/spells.json", "noop", "notarius.dnd.spells", "notarius_dnd_spells_v1", "v1"}
+				gotOutput := index.OutputFiles[0]
+				got := struct {
+					LaneID, MediaType, File, ModuleKey, SchemaID, SchemaName, SchemaVersion string
+				}{gotOutput.LaneID, gotOutput.MediaType, gotOutput.File, gotOutput.ModuleKey, gotOutput.SchemaID, gotOutput.SchemaName, gotOutput.SchemaVersion}
+				if got != wantOutput {
+					t.Fatalf("output index entries = %#v, want compatibility snapshot %#v", index.OutputFiles, wantOutput)
+				}
+				assertJSONEqual(t, readFile(t, filepath.Join(runDir, "lanes/spells.json")), []byte(`{
+					"spell_casts": [{
+						"caster": "Aria",
+						"spell": "Cure Wounds",
+						"effect": "Heals a wounded ally.",
+						"narrative_description": "Aria casts Cure Wounds.",
+						"source_refs": [{"source_id": "session-alpha", "start_unit_id": 1, "end_unit_id": 1}]
+					}]
+				}`))
+			} else if len(index.OutputFiles) != 0 {
+				t.Fatalf("output index entries = %#v, want none for rejected lane", index.OutputFiles)
+			}
+
+			var warnings struct {
+				Warnings []contracts.Warning `json:"warnings"`
+			}
+			readJSONFile(t, filepath.Join(runDir, "warnings.json"), &warnings)
+			if len(warnings.Warnings) != 0 {
+				t.Fatalf("warnings = %#v, want empty compatibility snapshot", warnings.Warnings)
+			}
+			var rejected struct {
+				Rejected []contracts.RejectedOutput `json:"rejected"`
+			}
+			readJSONFile(t, filepath.Join(runDir, "rejected.json"), &rejected)
+			if len(rejected.Rejected) != test.wantRejectedCount {
+				t.Fatalf("rejected outputs = %#v, want %d", rejected.Rejected, test.wantRejectedCount)
+			}
+			if test.wantRejectedCount == 1 {
+				got := rejected.Rejected[0]
+				if got.Stage != "extract" || got.LaneID != "spells" || got.ModuleKey != "dnd/spells" || got.ChunkID != "chunk-000001" || got.ChunkIndex != 0 || got.ValidatorName != "extract/dnd/spells/source_refs" || got.ReasonCode != "invalid_source_refs" || got.AttemptCount != 1 {
+					t.Fatalf("rejection = %#v, want maintained nonfatal validator outcome", got)
+				}
+			}
+		})
+	}
+}
+
+func TestProductionLLMCallersShareScheduledClient(t *testing.T) {
+	underlying := newBlockingProductionLLMClient()
+	scheduler, err := frameworkllm.NewScheduler(1)
+	if err != nil {
+		t.Fatalf("NewScheduler() error = %v, want nil", err)
+	}
+	client := frameworkllm.NewScheduledClient(underlying, scheduler)
+	doc := &source.SourceDocument{
+		ID: "session-alpha", Kind: "transcript", Format: "application/json", Digest: "sha256:source",
+		Units: []source.SourceUnit{
+			{ID: 1, Kind: "segment", Text: "Aria casts Cure Wounds.", Ref: source.SourceRef{SourceID: "session-alpha", StartUnitID: 1, EndUnitID: 1}},
+			{ID: 2, Kind: "segment", Text: "The spell takes effect.", Ref: source.SourceRef{SourceID: "session-alpha", StartUnitID: 2, EndUnitID: 2}},
+		},
+	}
+	chunk := source.Chunk{
+		ID: "session-alpha:chunk:0", SourceID: doc.ID, Index: 0, Ref: source.SourceRef{SourceID: doc.ID, StartUnitID: 1, EndUnitID: 2},
+		Content: []byte(`{"scene":"Aria casts Cure Wounds."}`), MediaType: "application/json", Units: append([]source.SourceUnit(nil), doc.Units...),
+	}
+
+	var started sync.WaitGroup
+	started.Add(2)
+	errs := make(chan error, 2)
+	go func() {
+		started.Done()
+		chunker, err := scenes.New(client, scenes.Options{})
+		if err == nil {
+			_, err = chunker.Chunk(context.Background(), contracts.ChunkRequest{Source: doc})
+		}
+		errs <- err
+	}()
+	go func() {
+		started.Done()
+		extractor, err := spells.New(client, spells.Options{})
+		if err == nil {
+			_, err = extractor.Extract(context.Background(), contracts.TypedExtractionRequest{Source: doc, Chunk: &chunk})
+		}
+		errs <- err
+	}()
+	started.Wait()
+
+	for i := 0; i < 2; i++ {
+		<-underlying.entered
+		underlying.release <- struct{}{}
+	}
+	for i := 0; i < 2; i++ {
+		if err := <-errs; err != nil {
+			t.Fatalf("production LLM caller error = %v, want nil", err)
+		}
+	}
+	if underlying.maxActive != 1 {
+		t.Fatalf("maximum concurrent provider calls = %d, want total_llm limit 1", underlying.maxActive)
+	}
+	sort.Strings(underlying.stageNames)
+	if !reflect.DeepEqual(underlying.stageNames, []string{"dnd/scenes", "dnd/spells"}) {
+		t.Fatalf("scheduled stage names = %#v, want both production LLM callers", underlying.stageNames)
+	}
+}
+
+func TestProductionBundlePreservesLaneAndChunkOrder(t *testing.T) {
+	configPath := writeTestConfig(t, `version: 2
+pipelines:
+  dnd-session:
+    input: seriatim
+    chunk:
+      module: generic
+      options:
+        max_units: 1
+    artifacts:
+      zeta:
+        extract: dnd/spells
+      alpha:
+        extract: dnd/spells
+`)
+	outputDir := t.TempDir()
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	code := RunWithOptions([]string{
+		"run", "dnd-session",
+		"--config", configPath,
+		"--input", fixturePath(t, "examples/seriatim-minimal-transcript.json"),
+		"--output-dir", outputDir,
+		"--diagnostics-dir", t.TempDir(),
+	}, &stdout, &stderr, Options{LLMClientFactory: fakeLLMFactory(orderingProductionLLMClient{}, nil)})
+	if code != 0 {
+		t.Fatalf("RunWithOptions() code = %d, stderr=%q", code, stderr.String())
+	}
+
+	runDir := onlyChildDir(t, outputDir)
+	var index struct {
+		OutputFiles []struct {
+			LaneID string `json:"lane_id"`
+		} `json:"output_files"`
+	}
+	readJSONFile(t, filepath.Join(runDir, "index.json"), &index)
+	if len(index.OutputFiles) != 2 {
+		t.Fatalf("output index entries = %#v, want two lanes", index.OutputFiles)
+	}
+	if got := []string{index.OutputFiles[0].LaneID, index.OutputFiles[1].LaneID}; !reflect.DeepEqual(got, []string{"alpha", "zeta"}) {
+		t.Fatalf("output lane order = %#v, want resolved lane order", got)
+	}
+	for _, laneID := range []string{"alpha", "zeta"} {
+		var payload struct {
+			SpellCasts []struct {
+				Spell      string             `json:"spell"`
+				SourceRefs []source.SourceRef `json:"source_refs"`
+			} `json:"spell_casts"`
+		}
+		readJSONFile(t, filepath.Join(runDir, "lanes", laneID+".json"), &payload)
+		if len(payload.SpellCasts) != 2 {
+			t.Fatalf("lane %q spell casts = %#v, want one per source chunk", laneID, payload.SpellCasts)
+		}
+		got := []any{
+			payload.SpellCasts[0].Spell, payload.SpellCasts[0].SourceRefs[0].StartUnitID,
+			payload.SpellCasts[1].Spell, payload.SpellCasts[1].SourceRefs[0].StartUnitID,
+		}
+		if !reflect.DeepEqual(got, []any{"Cure Wounds", 1, "Shield", 2}) {
+			t.Fatalf("lane %q chunk handoff order = %#v, want source chunk order", laneID, got)
+		}
+	}
+}
+
+type blockingProductionLLMClient struct {
+	mu         sync.Mutex
+	active     int
+	maxActive  int
+	stageNames []string
+	entered    chan struct{}
+	release    chan struct{}
+}
+
+type orderingProductionLLMClient struct{}
+
+func (orderingProductionLLMClient) CompleteStructured(_ context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
+	material := req.Inputs["transcript"]
+	unitID := 1
+	spellName := "Cure Wounds"
+	if strings.Contains(string(material.Content), "Shield") {
+		unitID = 2
+		spellName = "Shield"
+	}
+	payload, err := json.Marshal(map[string]any{
+		"spell_casts": []map[string]any{{
+			"caster":                "Aria",
+			"spell":                 spellName,
+			"effect":                "Fixture effect.",
+			"narrative_description": "Fixture spell cast.",
+			"source_refs": []map[string]any{{
+				"start_unit_id": unitID,
+				"end_unit_id":   unitID,
+			}},
+		}},
+	})
+	if err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	if err := json.Unmarshal(payload, out); err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	return contracts.StructuredCompletionResponse{Content: payload}, nil
+}
+
+func newBlockingProductionLLMClient() *blockingProductionLLMClient {
+	return &blockingProductionLLMClient{entered: make(chan struct{}, 2), release: make(chan struct{}, 2)}
+}
+
+func (client *blockingProductionLLMClient) CompleteStructured(ctx context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
+	client.mu.Lock()
+	client.active++
+	if client.active > client.maxActive {
+		client.maxActive = client.active
+	}
+	client.stageNames = append(client.stageNames, req.StageName)
+	client.mu.Unlock()
+	client.entered <- struct{}{}
+
+	select {
+	case <-ctx.Done():
+		return contracts.StructuredCompletionResponse{}, ctx.Err()
+	case <-client.release:
+	}
+
+	client.mu.Lock()
+	client.active--
+	client.mu.Unlock()
+
+	var payload []byte
+	switch req.StageName {
+	case scenes.Key:
+		payload = []byte(`{"scenes":[{"start_unit_id":1,"end_unit_id":2,"short_title":"Spell","primary_mode":"Narrative","main_participants":["Aria"],"summary":"Aria casts a spell.","boundary_note":"Complete source.","boundary_confidence":"High"}],"boundary_caveats":[]}`)
+	case spells.Key:
+		payload = []byte(`{"spell_casts":[{"caster":"Aria","spell":"Cure Wounds","effect":"Healing","narrative_description":"Aria casts Cure Wounds.","source_refs":[{"start_unit_id":1,"end_unit_id":1}]}]}`)
+	}
+	if err := json.Unmarshal(payload, out); err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	return contracts.StructuredCompletionResponse{Content: payload}, nil
+}
+
+func sceneManifestMetadata(t *testing.T) map[string]any {
+	t.Helper()
+	chunker, err := scenes.New(orderingProductionLLMClient{}, scenes.Options{})
+	if err != nil {
+		t.Fatalf("construct scene chunker: %v", err)
+	}
+	return chunker.ManifestMetadata()
+}
+
+func spellManifestMetadata(t *testing.T) map[string]any {
+	t.Helper()
+	extractor, err := spells.New(orderingProductionLLMClient{}, spells.Options{})
+	if err != nil {
+		t.Fatalf("construct spell extractor: %v", err)
+	}
+	return extractor.ManifestMetadata()
+}
+
+func assertAssetNames(t *testing.T, getFS func() (fs.FS, error), want []string) {
+	t.Helper()
+	fSys, err := getFS()
+	if err != nil {
+		t.Fatalf("asset filesystem error = %v, want nil", err)
+	}
+	var got []string
+	if err := fs.WalkDir(fSys, ".", func(path string, entry fs.DirEntry, err error) error {
+		if err == nil && !entry.IsDir() {
+			got = append(got, path)
+		}
+		return err
+	}); err != nil {
+		t.Fatalf("walk assets: %v", err)
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("asset names = %#v, want compatibility snapshot %#v", got, want)
+	}
+}
+
+func resolvedValidatorKeys(chains []pipeline.ResolvedValidatorChain, stage pipeline.ModuleStage, laneID, moduleKey string) []string {
+	for _, chain := range chains {
+		if chain.Stage == stage && chain.LaneID == laneID && chain.ModuleKey == moduleKey {
+			keys := make([]string, 0, len(chain.Validators))
+			for _, validator := range chain.Validators {
+				keys = append(keys, validator.Binding.Module)
+			}
+			return keys
+		}
+	}
+	return nil
+}
+
+func relativeFileNames(t *testing.T, root string) []string {
+	t.Helper()
+	var names []string
+	if err := filepath.WalkDir(root, func(path string, entry fs.DirEntry, err error) error {
+		if err != nil || entry.IsDir() {
+			return err
+		}
+		rel, err := filepath.Rel(root, path)
+		if err != nil {
+			return err
+		}
+		names = append(names, filepath.ToSlash(rel))
+		return nil
+	}); err != nil {
+		t.Fatalf("walk durable output: %v", err)
+	}
+	sort.Strings(names)
+	return names
+}
+
+func assertJSONEqual(t *testing.T, got, want []byte) {
+	t.Helper()
+	var gotValue any
+	var wantValue any
+	if err := json.Unmarshal(got, &gotValue); err != nil {
+		t.Fatalf("unmarshal actual JSON: %v", err)
+	}
+	if err := json.Unmarshal(want, &wantValue); err != nil {
+		t.Fatalf("unmarshal expected JSON: %v", err)
+	}
+	if !reflect.DeepEqual(gotValue, wantValue) {
+		t.Fatalf("JSON = %#v, want compatibility snapshot %#v", gotValue, wantValue)
+	}
+}

internal/cli/scriptorium_profiles.go

@@ -0,0 +1,68 @@
+package cli
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"testing/fstest"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+const profileCheckPromptID = "notarius.profile.check"
+
+var profileCheckPromptFS = fstest.MapFS{
+	"prompts/profile-check.yaml": &fstest.MapFile{Data: []byte(`id: notarius.profile.check
+version: "1.0.0"
+default_profile: mistral-small-3
+inputs:
+  - name: transcript
+    required: true
+messages:
+  - role: user
+    content: "{{input \"transcript\"}}"
+output:
+  format: text
+  validation_mode: none
+  repair_attempts: 0
+`)},
+}
+
+func validateExplicitScriptoriumProfiles(ctx context.Context, cfg config.Config, profileIDs []string) error {
+	if len(profileIDs) == 0 {
+		return nil
+	}
+	engine, err := newProfileValidationEngine(cfg)
+	if err != nil {
+		return fmt.Errorf("load Scriptorium profiles: %w", err)
+	}
+	for _, profileID := range profileIDs {
+		if _, err := engine.Prepare(ctx, scriptorium.RunRequest{
+			PromptID:  profileCheckPromptID,
+			ProfileID: profileID,
+			Inputs: map[string]scriptorium.ArtifactRef{
+				"transcript": scriptorium.Inline("profile check"),
+			},
+		}); err != nil {
+			if errors.Is(err, scriptorium.ErrProfileNotFound) {
+				return fmt.Errorf("Scriptorium profile %q is not configured", profileID)
+			}
+			return fmt.Errorf("validate Scriptorium profile %q: %w", profileID, err)
+		}
+	}
+	return nil
+}
+
+func newProfileValidationEngine(cfg config.Config) (*scriptorium.Engine, error) {
+	opts := []scriptorium.Option{
+		scriptorium.WithPromptFS(profileCheckPromptFS, "prompts"),
+	}
+	if cfg.Scriptorium.ProfileFile != "" {
+		opts = append(opts, scriptorium.WithProfileFile(cfg.Scriptorium.ProfileFile))
+	}
+	return scriptorium.NewEngine(scriptorium.Config{
+		PromptDir:  "unused",
+		ProfileDir: cfg.Scriptorium.ProfileDir,
+	}, opts...)
+}

internal/core/artifacts/artifacts.go

@@ -1,91 +1,95 @@
 package artifacts
 
 import (
-	"encoding/json"
 	"time"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 )
 
-type ArtifactCandidate struct {
-	Index         int                `json:"index"`
-	ExtractorKey  string             `json:"extractor_key"`
-	ArtifactType  string             `json:"artifact_type"`
-	SchemaVersion string             `json:"schema_version"`
-	Payload       json.RawMessage    `json:"payload"`
-	SourceRefs    []source.SourceRef `json:"source_refs,omitempty"`
-	Metadata      map[string]any     `json:"metadata,omitempty"`
-}
-
-type Artifact struct {
-	ExtractorKey  string             `json:"extractor_key"`
-	ArtifactType  string             `json:"artifact_type"`
-	SchemaVersion string             `json:"schema_version"`
-	Payload       json.RawMessage    `json:"payload"`
-	SourceRefs    []source.SourceRef `json:"source_refs,omitempty"`
-	Metadata      map[string]any     `json:"metadata,omitempty"`
-}
-
-type RejectedArtifact struct {
-	Candidate     ArtifactCandidate `json:"candidate"`
-	ValidatorName string            `json:"validator_name"`
-	ReasonCode    string            `json:"reason_code"`
-	Message       string            `json:"message"`
-}
-
 type ArtifactLaneManifest struct {
 	ID         string         `json:"id"`
 	Extractor  string         `json:"extractor"`
 	Merger     string         `json:"merger"`
 	Normalizer string         `json:"normalizer"`
-	Validators []string       `json:"validators,omitempty"`
 	Metadata   map[string]any `json:"metadata,omitempty"`
 }
 
+type ValidatorChainManifest struct {
+	Stage      string              `json:"stage"`
+	LaneID     string              `json:"lane_id,omitempty"`
+	ModuleKey  string              `json:"module_key"`
+	Validators []ValidatorManifest `json:"validators"`
+}
+
+type ValidatorManifest struct {
+	Key            string `json:"key"`
+	ExecutionClass string `json:"execution_class"`
+}
+
 type LLMProfileManifest struct {
 	ID       string `json:"id"`
 	Provider string `json:"provider,omitempty"`
 	Model    string `json:"model,omitempty"`
 }
 
+type ReferenceProvenance struct {
+	Stage         string `json:"stage,omitempty"`
+	LaneID        string `json:"lane_id,omitempty"`
+	SlotName      string `json:"slot_name"`
+	OriginType    string `json:"origin_type"`
+	OriginURI     string `json:"origin_uri,omitempty"`
+	Digest        string `json:"digest,omitempty"`
+	MediaType     string `json:"media_type,omitempty"`
+	SizeBytes     int64  `json:"size_bytes,omitempty"`
+	BindingSource string `json:"binding_source,omitempty"`
+}
+
+type OutputSchemaProvenance struct {
+	ID      string `json:"id,omitempty"`
+	Name    string `json:"name,omitempty"`
+	Version string `json:"version,omitempty"`
+}
+
+type NormalizedOutputManifest struct {
+	LaneID    string                 `json:"lane_id"`
+	ModuleKey string                 `json:"module_key,omitempty"`
+	SourceID  string                 `json:"source_id,omitempty"`
+	MediaType string                 `json:"media_type,omitempty"`
+	Schema    OutputSchemaProvenance `json:"schema,omitempty"`
+}
+
+type RejectedOutputManifest struct {
+	Stage                  string `json:"stage"`
+	LaneID                 string `json:"lane_id,omitempty"`
+	ModuleKey              string `json:"module_key,omitempty"`
+	ChunkID                string `json:"chunk_id,omitempty"`
+	ChunkIndex             int    `json:"chunk_index,omitempty"`
+	ValidatorName          string `json:"validator_name,omitempty"`
+	ReasonCode             string `json:"reason_code,omitempty"`
+	Message                string `json:"message,omitempty"`
+	AttemptCount           int    `json:"attempt_count,omitempty"`
+	DiagnosticArtifactPath string `json:"diagnostic_artifact_path,omitempty"`
+}
+
 type RunManifest struct {
-	RunID            string                 `json:"run_id,omitempty"`
-	PipelineID       string                 `json:"pipeline_id,omitempty"`
-	PipelineDigest   string                 `json:"pipeline_digest,omitempty"`
-	InputModule      string                 `json:"input_module,omitempty"`
-	Chunker          string                 `json:"chunker,omitempty"`
-	SourceDigests    []string               `json:"source_digests,omitempty"`
-	Extractors       []string               `json:"extractors,omitempty"`
-	Merger           string                 `json:"merger,omitempty"`
-	Normalizer       string                 `json:"normalizer,omitempty"`
-	OutputEncoder    string                 `json:"output_encoder,omitempty"`
-	ArtifactLanes    []ArtifactLaneManifest `json:"artifact_lanes,omitempty"`
-	LLMProfiles      []LLMProfileManifest   `json:"llm_profiles,omitempty"`
-	SchemaVersion    string                 `json:"schema_version,omitempty"`
-	ValidationStatus string                 `json:"validation_status,omitempty"`
-	StartedAt        *time.Time             `json:"started_at,omitempty"`
-	CompletedAt      *time.Time             `json:"completed_at,omitempty"`
-}
-
-func ArtifactFromCandidate(candidate ArtifactCandidate) Artifact {
-	return Artifact{
-		ExtractorKey:  candidate.ExtractorKey,
-		ArtifactType:  candidate.ArtifactType,
-		SchemaVersion: candidate.SchemaVersion,
-		Payload:       append(json.RawMessage(nil), candidate.Payload...),
-		SourceRefs:    append([]source.SourceRef(nil), candidate.SourceRefs...),
-		Metadata:      copyMetadata(candidate.Metadata),
-	}
-}
-
-func copyMetadata(metadata map[string]any) map[string]any {
-	if len(metadata) == 0 {
-		return nil
-	}
-
-	copied := make(map[string]any, len(metadata))
-	for key, value := range metadata {
-		copied[key] = value
-	}
-	return copied
+	RunID             string                     `json:"run_id,omitempty"`
+	PipelineID        string                     `json:"pipeline_id,omitempty"`
+	PipelineDigest    string                     `json:"pipeline_digest,omitempty"`
+	InputModule       string                     `json:"input_module,omitempty"`
+	Chunker           string                     `json:"chunker,omitempty"`
+	SourceDigests     []string                   `json:"source_digests,omitempty"`
+	Extractors        []string                   `json:"extractors,omitempty"`
+	Merger            string                     `json:"merger,omitempty"`
+	Normalizer        string                     `json:"normalizer,omitempty"`
+	OutputEncoder     string                     `json:"output_encoder,omitempty"`
+	ModuleMetadata    map[string]map[string]any  `json:"module_metadata,omitempty"`
+	ArtifactLanes     []ArtifactLaneManifest     `json:"artifact_lanes,omitempty"`
+	ValidatorChains   []ValidatorChainManifest   `json:"validator_chains,omitempty"`
+	References        []ReferenceProvenance      `json:"references,omitempty"`
+	NormalizedOutputs []NormalizedOutputManifest `json:"normalized_outputs,omitempty"`
+	RejectedOutputs   []RejectedOutputManifest   `json:"rejected_outputs,omitempty"`
+	LLMProfiles       []LLMProfileManifest       `json:"llm_profiles,omitempty"`
+	Metadata          map[string]any             `json:"metadata,omitempty"`
+	SchemaVersion     string                     `json:"schema_version,omitempty"`
+	ValidationStatus  string                     `json:"validation_status,omitempty"`
+	StartedAt         *time.Time                 `json:"started_at,omitempty"`
+	CompletedAt       *time.Time                 `json:"completed_at,omitempty"`
 }

internal/core/artifacts/artifacts_test.go

@@ -2,116 +2,9 @@ package artifacts
 
 import (
 	"encoding/json"
-	"reflect"
 	"testing"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 )
 
-func TestArtifactFromCandidatePreservesCandidateFields(t *testing.T) {
-	candidate := ArtifactCandidate{
-		Index:         7,
-		ExtractorKey:  "generic-extractor",
-		ArtifactType:  "generic-artifact",
-		SchemaVersion: "v1",
-		Payload:       json.RawMessage(`{"name":"example"}`),
-		SourceRefs: []source.SourceRef{
-			{SourceID: "source-1", StartUnitID: "u1", EndUnitID: "u2"},
-		},
-		Metadata: map[string]any{
-			"confidence": 0.75,
-		},
-	}
-
-	artifact := ArtifactFromCandidate(candidate)
-
-	if artifact.ExtractorKey != candidate.ExtractorKey {
-		t.Fatalf("ExtractorKey = %q, want %q", artifact.ExtractorKey, candidate.ExtractorKey)
-	}
-	if artifact.ArtifactType != candidate.ArtifactType {
-		t.Fatalf("ArtifactType = %q, want %q", artifact.ArtifactType, candidate.ArtifactType)
-	}
-	if artifact.SchemaVersion != candidate.SchemaVersion {
-		t.Fatalf("SchemaVersion = %q, want %q", artifact.SchemaVersion, candidate.SchemaVersion)
-	}
-	if string(artifact.Payload) != string(candidate.Payload) {
-		t.Fatalf("Payload = %s, want %s", artifact.Payload, candidate.Payload)
-	}
-	if !reflect.DeepEqual(artifact.SourceRefs, candidate.SourceRefs) {
-		t.Fatalf("SourceRefs = %#v, want %#v", artifact.SourceRefs, candidate.SourceRefs)
-	}
-	if !reflect.DeepEqual(artifact.Metadata, candidate.Metadata) {
-		t.Fatalf("Metadata = %#v, want %#v", artifact.Metadata, candidate.Metadata)
-	}
-
-	candidate.Payload[0] = '['
-	candidate.SourceRefs[0].StartUnitID = "changed"
-	candidate.Metadata["confidence"] = 0.5
-
-	if string(artifact.Payload) != `{"name":"example"}` {
-		t.Fatalf("Payload changed after candidate mutation: %s", artifact.Payload)
-	}
-	if artifact.SourceRefs[0].StartUnitID != "u1" {
-		t.Fatalf("SourceRefs changed after candidate mutation: %#v", artifact.SourceRefs)
-	}
-	if artifact.Metadata["confidence"] != 0.75 {
-		t.Fatalf("Metadata changed after candidate mutation: %#v", artifact.Metadata)
-	}
-}
-
-func TestJSONMarshalUsesExpectedFieldNames(t *testing.T) {
-	candidate := ArtifactCandidate{
-		Index:         1,
-		ExtractorKey:  "generic-extractor",
-		ArtifactType:  "generic-artifact",
-		SchemaVersion: "v1",
-		Payload:       json.RawMessage(`{"value":true}`),
-		SourceRefs: []source.SourceRef{
-			{SourceID: "source-1", StartUnitID: "u1", EndUnitID: "u1"},
-		},
-		Metadata: map[string]any{
-			"reviewed": true,
-		},
-	}
-	rejected := RejectedArtifact{
-		Candidate:     candidate,
-		ValidatorName: "generic-validator",
-		ReasonCode:    "invalid",
-		Message:       "candidate was not accepted",
-	}
-
-	gotJSON, err := json.Marshal(rejected)
-	if err != nil {
-		t.Fatalf("json.Marshal() error = %v", err)
-	}
-
-	var got map[string]any
-	if err := json.Unmarshal(gotJSON, &got); err != nil {
-		t.Fatalf("json.Unmarshal() error = %v", err)
-	}
-
-	assertHasKeys(t, got, "candidate", "validator_name", "reason_code", "message")
-
-	gotCandidate, ok := got["candidate"].(map[string]any)
-	if !ok {
-		t.Fatalf("candidate = %#v, want object", got["candidate"])
-	}
-	assertHasKeys(t, gotCandidate, "index", "extractor_key", "artifact_type", "schema_version", "payload", "source_refs", "metadata")
-
-	gotRefs, ok := gotCandidate["source_refs"].([]any)
-	if !ok {
-		t.Fatalf("source_refs = %#v, want array", gotCandidate["source_refs"])
-	}
-	if len(gotRefs) != 1 {
-		t.Fatalf("len(source_refs) = %d, want 1", len(gotRefs))
-	}
-	gotRef, ok := gotRefs[0].(map[string]any)
-	if !ok {
-		t.Fatalf("source_refs[0] = %#v, want object", gotRefs[0])
-	}
-	assertHasKeys(t, gotRef, "source_id", "start_unit_id", "end_unit_id")
-}
-
 func TestRunManifestOmitsEmptyOptionalFields(t *testing.T) {
 	gotJSON, err := json.Marshal(RunManifest{})
 	if err != nil {
@@ -128,7 +21,7 @@ func TestRunManifestIncludesPipelineAndArtifactLaneFields(t *testing.T) {
 		PipelineID:     "pipeline-1",
 		PipelineDigest: "sha256:abc123",
 		LLMProfiles: []LLMProfileManifest{
-			{ID: "default", Provider: "openai-compatible", Model: "model-a"},
+			{ID: "default", Provider: "scriptorium", Model: "model-a"},
 		},
 		ArtifactLanes: []ArtifactLaneManifest{
 			{
@@ -136,12 +29,21 @@ func TestRunManifestIncludesPipelineAndArtifactLaneFields(t *testing.T) {
 				Extractor:  "event-extractor",
 				Merger:     "appendorder",
 				Normalizer: "noop",
-				Validators: []string{"grounded"},
 				Metadata: map[string]any{
 					"extractor": map[string]any{"prompt_id": "test.prompt"},
 				},
 			},
 		},
+		ValidatorChains: []ValidatorChainManifest{
+			{
+				Stage:     "extract",
+				LaneID:    "events",
+				ModuleKey: "event-extractor",
+				Validators: []ValidatorManifest{
+					{Key: "grounded", ExecutionClass: "deterministic"},
+				},
+			},
+		},
 	}
 
 	gotJSON, err := json.Marshal(manifest)
@@ -154,7 +56,7 @@ func TestRunManifestIncludesPipelineAndArtifactLaneFields(t *testing.T) {
 		t.Fatalf("json.Unmarshal() error = %v", err)
 	}
 
-	assertHasKeys(t, got, "pipeline_id", "pipeline_digest", "artifact_lanes", "llm_profiles")
+	assertHasKeys(t, got, "pipeline_id", "pipeline_digest", "artifact_lanes", "validator_chains", "llm_profiles")
 
 	profiles, ok := got["llm_profiles"].([]any)
 	if !ok {
@@ -180,7 +82,94 @@ func TestRunManifestIncludesPipelineAndArtifactLaneFields(t *testing.T) {
 	if !ok {
 		t.Fatalf("artifact_lanes[0] = %#v, want object", lanes[0])
 	}
-	assertHasKeys(t, lane, "id", "extractor", "merger", "normalizer", "validators", "metadata")
+	assertHasKeys(t, lane, "id", "extractor", "merger", "normalizer", "metadata")
+
+	chains, ok := got["validator_chains"].([]any)
+	if !ok {
+		t.Fatalf("validator_chains = %#v, want array", got["validator_chains"])
+	}
+	if len(chains) != 1 {
+		t.Fatalf("len(validator_chains) = %d, want 1", len(chains))
+	}
+	chain, ok := chains[0].(map[string]any)
+	if !ok {
+		t.Fatalf("validator_chains[0] = %#v, want object", chains[0])
+	}
+	assertHasKeys(t, chain, "stage", "lane_id", "module_key", "validators")
+}
+
+func TestRunManifestIncludesReferenceProvenance(t *testing.T) {
+	manifest := RunManifest{
+		References: []ReferenceProvenance{
+			{
+				Stage:         "extract",
+				LaneID:        "events",
+				SlotName:      "roster",
+				OriginType:    "file",
+				OriginURI:     "file:///tmp/roster.txt",
+				Digest:        "sha256:reference",
+				MediaType:     "text/plain; charset=utf-8",
+				SizeBytes:     12,
+				BindingSource: "config",
+			},
+		},
+	}
+
+	gotJSON, err := json.Marshal(manifest)
+	if err != nil {
+		t.Fatalf("json.Marshal() error = %v", err)
+	}
+
+	var got RunManifest
+	if err := json.Unmarshal(gotJSON, &got); err != nil {
+		t.Fatalf("json.Unmarshal() error = %v", err)
+	}
+	if len(got.References) != 1 {
+		t.Fatalf("len(References) = %d, want 1", len(got.References))
+	}
+	reference := got.References[0]
+	if reference.Stage != "extract" || reference.LaneID != "events" || reference.SlotName != "roster" || reference.OriginType != "file" || reference.OriginURI != "file:///tmp/roster.txt" {
+		t.Fatalf("reference provenance = %#v, want lane-scoped origin details", reference)
+	}
+	if reference.Digest != "sha256:reference" || reference.MediaType != "text/plain; charset=utf-8" || reference.SizeBytes != 12 || reference.BindingSource != "config" {
+		t.Fatalf("reference provenance = %#v, want digest/media/size/source details", reference)
+	}
+}
+
+func TestRunManifestIncludesTopLevelModuleMetadata(t *testing.T) {
+	manifest := RunManifest{
+		ModuleMetadata: map[string]map[string]any{
+			"chunker": {
+				"prompt_id":            "dnd.scenes",
+				"prompt_version":       "v1",
+				"prompt_sha256":        "sha256:abc123",
+				"response_schema_key":  "dnd_scenes",
+				"response_schema_name": "dnd_scenes",
+			},
+		},
+	}
+
+	gotJSON, err := json.Marshal(manifest)
+	if err != nil {
+		t.Fatalf("json.Marshal() error = %v", err)
+	}
+
+	var got map[string]any
+	if err := json.Unmarshal(gotJSON, &got); err != nil {
+		t.Fatalf("json.Unmarshal() error = %v", err)
+	}
+
+	moduleMetadata, ok := got["module_metadata"].(map[string]any)
+	if !ok {
+		t.Fatalf("module_metadata = %#v, want object", got["module_metadata"])
+	}
+	assertHasKeys(t, moduleMetadata, "chunker")
+
+	chunkerMetadata, ok := moduleMetadata["chunker"].(map[string]any)
+	if !ok {
+		t.Fatalf("module_metadata.chunker = %#v, want object", moduleMetadata["chunker"])
+	}
+	assertHasKeys(t, chunkerMetadata, "prompt_id", "prompt_version", "prompt_sha256", "response_schema_key", "response_schema_name")
 }
 
 func assertHasKeys(t *testing.T, values map[string]any, keys ...string) {

internal/core/config/config.go

@@ -1,32 +1,34 @@
 package config
 
 import (
+	"path/filepath"
+	"strings"
+
 	"gitea.maximumdirect.net/eric/notarius/internal/core/diagnostics"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
-const SupportedFileConfigVersion = 1
+const SupportedFileConfigVersion = 2
 
 type Config struct {
-	LLMProfiles map[string]LLMProfile               `json:"llm_profiles"`
+	Scriptorium ScriptoriumConfig                   `json:"scriptorium,omitempty"`
 	Pipelines   map[string]pipeline.PipelineProfile `json:"pipelines"`
 	Concurrency ConcurrencyConfig                   `json:"concurrency"`
 	Diagnostics DiagnosticsConfig                   `json:"diagnostics"`
+	Workspace   WorkspaceConfig                     `json:"workspace"`
 }
 
-type LLMProfile struct {
-	Provider       string `json:"provider,omitempty"`
-	BaseURL        string `json:"base_url,omitempty"`
-	Model          string `json:"model,omitempty"`
-	APIKey         string `json:"api_key,omitempty"`
-	APIKeyEnv      string `json:"api_key_env,omitempty"`
-	TimeoutSeconds int    `json:"timeout_seconds,omitempty"`
-	MaxRetries     int    `json:"max_retries,omitempty"`
-	MaxConcurrency int    `json:"max_concurrency,omitempty"`
+type ScriptoriumConfig struct {
+	ProfileDir  string `json:"profile_dir,omitempty"`
+	ProfileFile string `json:"profile_file,omitempty"`
 }
 
 type ConcurrencyConfig struct {
-	TotalLLM int `json:"total_llm"`
+	TotalLLM     int            `json:"total_llm"`
+	StageWorkers map[string]int `json:"stage_workers"`
+
+	extractWorkersConfigured bool
+	defaultedExtractWorkers  int
 }
 
 type DiagnosticsConfig struct {
@@ -34,33 +36,78 @@ type DiagnosticsConfig struct {
 	Retention diagnostics.RetentionMode `json:"retention"`
 }
 
+type WorkspaceConfig struct {
+	Directory   string                     `json:"directory,omitempty"`
+	Diagnostics WorkspaceDiagnosticsConfig `json:"diagnostics"`
+	Resume      WorkspaceResumeConfig      `json:"resume"`
+	Debug       WorkspaceDebugConfig       `json:"debug"`
+}
+
+type WorkspaceDiagnosticsConfig struct {
+	Enabled      bool                      `json:"enabled"`
+	Retention    diagnostics.RetentionMode `json:"retention,omitempty"`
+	enabledSet   bool
+	retentionSet bool
+}
+
+type WorkspaceResumeConfig struct {
+	Enabled bool `json:"enabled"`
+}
+
+type WorkspaceDebugConfig struct {
+	Enabled bool `json:"enabled"`
+}
+
 func Default() Config {
 	return Config{
-		LLMProfiles: map[string]LLMProfile{
-			pipeline.DefaultLLMProfile: {
-				Provider:       "openai-compatible",
-				TimeoutSeconds: 600,
-				MaxRetries:     3,
-				MaxConcurrency: 1,
-			},
-		},
 		Pipelines: map[string]pipeline.PipelineProfile{},
 		Concurrency: ConcurrencyConfig{
-			TotalLLM: 1,
+			TotalLLM:                1,
+			StageWorkers:            map[string]int{"extract": 1},
+			defaultedExtractWorkers: 1,
 		},
 		Diagnostics: DiagnosticsConfig{
 			WorkDir:   "/tmp/notarius",
 			Retention: diagnostics.RetentionAuto,
 		},
+		Workspace: WorkspaceConfig{
+			Diagnostics: WorkspaceDiagnosticsConfig{
+				Enabled: true,
+			},
+		},
 	}
 }
 
+func (c *Config) RecomputeEffectiveDiagnostics() {
+	if c == nil {
+		return
+	}
+	if dir := c.workspaceDirectory(); dir != "" {
+		c.Diagnostics.WorkDir = filepath.Join(dir, "diagnostics")
+	}
+	if c.Workspace.Diagnostics.retentionSet {
+		c.Diagnostics.Retention = c.Workspace.Diagnostics.Retention
+	}
+}
+
+func (c Config) DiagnosticsEnabled() bool {
+	if !c.Workspace.Diagnostics.enabledSet {
+		return true
+	}
+	return c.Workspace.Diagnostics.Enabled
+}
+
+func (c Config) workspaceDirectory() string {
+	dir := strings.TrimSpace(c.Workspace.Directory)
+	if dir == "" {
+		return ""
+	}
+	return filepath.Clean(dir)
+}
+
 func cloneConfig(in Config) Config {
 	out := in
-	out.LLMProfiles = make(map[string]LLMProfile, len(in.LLMProfiles))
-	for key, profile := range in.LLMProfiles {
-		out.LLMProfiles[key] = profile
-	}
+	out.Concurrency.StageWorkers = cloneIntMap(in.Concurrency.StageWorkers)
 	out.Pipelines = make(map[string]pipeline.PipelineProfile, len(in.Pipelines))
 	for key, profile := range in.Pipelines {
 		out.Pipelines[key] = clonePipelineProfile(profile)
@@ -68,11 +115,40 @@ func cloneConfig(in Config) Config {
 	return out
 }
 
+func cloneIntMap(in map[string]int) map[string]int {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make(map[string]int, len(in))
+	for key, value := range in {
+		out[key] = value
+	}
+	return out
+}
+
+func (c *ConcurrencyConfig) recomputeStageWorkerDefaults() {
+	if c == nil {
+		return
+	}
+	if c.StageWorkers == nil {
+		c.StageWorkers = make(map[string]int)
+	}
+	if !c.extractWorkersConfigured {
+		if value, ok := c.StageWorkers["extract"]; ok && (c.defaultedExtractWorkers == 0 || value != c.defaultedExtractWorkers) {
+			c.extractWorkersConfigured = true
+			return
+		}
+		c.StageWorkers["extract"] = c.TotalLLM
+		c.defaultedExtractWorkers = c.TotalLLM
+	}
+}
+
 func clonePipelineProfile(in pipeline.PipelineProfile) pipeline.PipelineProfile {
 	out := in
 	out.Input = cloneModuleBinding(in.Input)
 	out.Chunk = cloneModuleBinding(in.Chunk)
 	out.Output = cloneModuleBinding(in.Output)
+	out.References = cloneStringMap(in.References)
 	if len(in.Artifacts) > 0 {
 		out.Artifacts = make(map[string]pipeline.ArtifactLaneProfile, len(in.Artifacts))
 		for key, lane := range in.Artifacts {
@@ -87,6 +163,7 @@ func cloneArtifactLaneProfile(in pipeline.ArtifactLaneProfile) pipeline.Artifact
 	out.Extract = cloneModuleBinding(in.Extract)
 	out.Merge = cloneModuleBinding(in.Merge)
 	out.Normalize = cloneModuleBinding(in.Normalize)
+	out.References = cloneStringMap(in.References)
 	if len(in.Validators) > 0 {
 		out.Validators = make([]pipeline.ModuleBinding, len(in.Validators))
 		for i, binding := range in.Validators {
@@ -96,11 +173,35 @@ func cloneArtifactLaneProfile(in pipeline.ArtifactLaneProfile) pipeline.Artifact
 	return out
 }
 
+func cloneStringMap(in map[string]string) map[string]string {
+	if len(in) == 0 {
+		return nil
+	}
+	out := make(map[string]string, len(in))
+	for key, value := range in {
+		out[key] = value
+	}
+	return out
+}
+
 func cloneModuleBinding(in pipeline.ModuleBinding) pipeline.ModuleBinding {
 	out := in
 	if len(in.Options) > 0 {
 		out.Options = cloneOptions(in.Options)
 	}
+	out.References = cloneStringMap(in.References)
+	out.Validators = cloneValidatorOverride(in.Validators)
+	return out
+}
+
+func cloneValidatorOverride(in pipeline.ValidatorOverride) pipeline.ValidatorOverride {
+	out := pipeline.ValidatorOverride{Set: in.Set}
+	if len(in.Validators) > 0 {
+		out.Validators = make([]pipeline.ModuleBinding, len(in.Validators))
+		for i, binding := range in.Validators {
+			out.Validators[i] = cloneModuleBinding(binding)
+		}
+	}
 	return out
 }
 

internal/core/config/config_test.go

@@ -4,24 +4,13 @@ import (
 	"testing"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/diagnostics"
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
 func TestDefaultValues(t *testing.T) {
 	cfg := Default()
 
-	defaultProfile, ok := cfg.LLMProfiles[pipeline.DefaultLLMProfile]
-	if !ok {
-		t.Fatalf("expected default LLM profile")
-	}
-	if defaultProfile.Provider != "openai-compatible" {
-		t.Fatalf("unexpected provider: %q", defaultProfile.Provider)
-	}
-	if defaultProfile.BaseURL != "" || defaultProfile.Model != "" {
-		t.Fatalf("default profile should not require base URL/model yet: %+v", defaultProfile)
-	}
-	if defaultProfile.TimeoutSeconds != 600 || defaultProfile.MaxRetries != 3 || defaultProfile.MaxConcurrency != 1 {
-		t.Fatalf("unexpected default LLM operational values: %+v", defaultProfile)
+	if cfg.Scriptorium.ProfileDir != "" || cfg.Scriptorium.ProfileFile != "" {
+		t.Fatalf("unexpected Scriptorium profile source defaults: %+v", cfg.Scriptorium)
 	}
 	if len(cfg.Pipelines) != 0 {
 		t.Fatalf("expected no built-in pipeline profiles, got %v", cfg.Pipelines)
@@ -29,20 +18,37 @@ func TestDefaultValues(t *testing.T) {
 	if cfg.Concurrency.TotalLLM != 1 {
 		t.Fatalf("unexpected total LLM concurrency: %d", cfg.Concurrency.TotalLLM)
 	}
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 1 {
+		t.Fatalf("unexpected extract workers: %d", got)
+	}
 	if cfg.Diagnostics.WorkDir != "/tmp/notarius" {
 		t.Fatalf("unexpected diagnostics work dir: %q", cfg.Diagnostics.WorkDir)
 	}
 	if cfg.Diagnostics.Retention != diagnostics.RetentionAuto {
 		t.Fatalf("unexpected diagnostics retention: %q", cfg.Diagnostics.Retention)
 	}
+	if cfg.Workspace.Directory != "" {
+		t.Fatalf("unexpected workspace directory: %q", cfg.Workspace.Directory)
+	}
+	if !cfg.Workspace.Diagnostics.Enabled || !cfg.DiagnosticsEnabled() {
+		t.Fatalf("expected workspace diagnostics enabled by default: %+v", cfg.Workspace.Diagnostics)
+	}
+	if cfg.Workspace.Diagnostics.Retention != "" {
+		t.Fatalf("unexpected workspace diagnostics retention: %q", cfg.Workspace.Diagnostics.Retention)
+	}
+	if cfg.Workspace.Resume.Enabled {
+		t.Fatalf("workspace resume should be disabled by default")
+	}
+	if cfg.Workspace.Debug.Enabled {
+		t.Fatalf("workspace debug should be disabled by default")
+	}
 }
 
 func TestApplyFileConfigMergesWithDefaults(t *testing.T) {
 	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
-llm_profiles:
-  default:
-    model: test-model
+version: 2
+scriptorium:
+  profile_dir: ./profiles
 pipelines:
   example:
     input: fake/input
@@ -59,16 +65,15 @@ pipelines:
 		t.Fatalf("ApplyFileConfig: %v", err)
 	}
 
-	profile := cfg.LLMProfiles[pipeline.DefaultLLMProfile]
-	if profile.Model != "test-model" {
-		t.Fatalf("expected file model, got %+v", profile)
-	}
-	if profile.Provider != "openai-compatible" || profile.TimeoutSeconds != 600 || profile.MaxRetries != 3 {
-		t.Fatalf("expected default LLM fields to be preserved, got %+v", profile)
+	if cfg.Scriptorium.ProfileDir != "./profiles" {
+		t.Fatalf("expected Scriptorium profile dir, got %+v", cfg.Scriptorium)
 	}
 	if cfg.Concurrency.TotalLLM != 1 {
 		t.Fatalf("expected default concurrency preserved, got %d", cfg.Concurrency.TotalLLM)
 	}
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 1 {
+		t.Fatalf("expected default extract workers preserved, got %d", got)
+	}
 	if cfg.Diagnostics.Retention != diagnostics.RetentionAuto {
 		t.Fatalf("expected default diagnostics retention preserved, got %q", cfg.Diagnostics.Retention)
 	}

internal/core/config/effective_config.go

@@ -3,9 +3,7 @@ package config
 import (
 	"fmt"
 	"strings"
-	"time"
 
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
@@ -14,16 +12,21 @@ type ResolveInput struct {
 	Only               []string
 	Catalog            pipeline.ModuleCatalog
 	LLMProfileOverride string
+	ReferenceOverrides []pipeline.ReferenceBinding
+	ReferenceUnbinds   []pipeline.ReferenceUnbind
 }
 
 type EffectiveConfig struct {
-	Config           Config
-	PipelineID       string
-	Only             []string
-	ResolvedPipeline pipeline.ResolvedPipeline
+	Config             Config
+	PipelineID         string
+	Only               []string
+	ReferenceOverrides []pipeline.ReferenceBinding
+	ReferenceUnbinds   []pipeline.ReferenceUnbind
+	ResolvedPipeline   pipeline.ResolvedPipeline
 }
 
 func (c Config) Resolve(input ResolveInput) (EffectiveConfig, error) {
+	c.Concurrency.recomputeStageWorkerDefaults()
 	if err := c.Validate(); err != nil {
 		return EffectiveConfig{}, err
 	}
@@ -40,36 +43,34 @@ func (c Config) Resolve(input ResolveInput) (EffectiveConfig, error) {
 	profile = clonePipelineProfile(profile)
 	profile.ID = pipelineID
 	if override := strings.TrimSpace(input.LLMProfileOverride); override != "" {
-		if !hasLLMProfile(c.LLMProfiles, override) {
-			return EffectiveConfig{}, fmt.Errorf("LLM profile override %q is not configured", override)
-		}
 		applyLLMProfileOverride(&profile, override)
 	}
 
-	resolved, err := pipeline.ResolvePipeline(profile, pipeline.ResolveOptions{Only: input.Only}, input.Catalog)
+	resolved, err := pipeline.ResolvePipeline(profile, pipeline.ResolveOptions{
+		Only:               input.Only,
+		ReferenceOverrides: append([]pipeline.ReferenceBinding(nil), input.ReferenceOverrides...),
+		ReferenceUnbinds:   append([]pipeline.ReferenceUnbind(nil), input.ReferenceUnbinds...),
+	}, input.Catalog)
 	if err != nil {
 		return EffectiveConfig{}, fmt.Errorf("resolve pipeline %q: %w", pipelineID, err)
 	}
 
 	return EffectiveConfig{
-		Config:           cloneConfig(c),
-		PipelineID:       pipelineID,
-		Only:             append([]string(nil), input.Only...),
-		ResolvedPipeline: resolved,
+		Config:             cloneConfig(c),
+		PipelineID:         pipelineID,
+		Only:               append([]string(nil), input.Only...),
+		ReferenceOverrides: append([]pipeline.ReferenceBinding(nil), input.ReferenceOverrides...),
+		ReferenceUnbinds:   append([]pipeline.ReferenceUnbind(nil), input.ReferenceUnbinds...),
+		ResolvedPipeline:   resolved,
 	}, nil
 }
 
 func applyLLMProfileOverride(profile *pipeline.PipelineProfile, profileID string) {
-	profile.Input.LLMProfile = profileID
 	profile.Chunk.LLMProfile = profileID
-	profile.Output.LLMProfile = profileID
 	for laneID, lane := range profile.Artifacts {
 		lane.Extract.LLMProfile = profileID
 		lane.Merge.LLMProfile = profileID
 		lane.Normalize.LLMProfile = profileID
-		for i := range lane.Validators {
-			lane.Validators[i].LLMProfile = profileID
-		}
 		profile.Artifacts[laneID] = lane
 	}
 }
@@ -83,36 +84,3 @@ func lookupPipelineProfile(profiles map[string]pipeline.PipelineProfile, pipelin
 	}
 	return pipeline.PipelineProfile{}, false
 }
-
-func (c Config) OpenAICompatibleClientConfig(profileID string) (llm.OpenAICompatibleClientConfig, error) {
-	trimmedID := strings.TrimSpace(profileID)
-	profile, ok := c.LLMProfile(trimmedID)
-	if !ok {
-		return llm.OpenAICompatibleClientConfig{}, fmt.Errorf("LLM profile %q is not configured", trimmedID)
-	}
-
-	provider := strings.TrimSpace(profile.Provider)
-	if provider == "" {
-		provider = providerOpenAICompatible
-	}
-	if provider != providerOpenAICompatible {
-		return llm.OpenAICompatibleClientConfig{}, fmt.Errorf("LLM profile %q provider %q is not supported", trimmedID, provider)
-	}
-
-	baseURL := strings.TrimSpace(profile.BaseURL)
-	if baseURL == "" {
-		return llm.OpenAICompatibleClientConfig{}, fmt.Errorf("LLM profile %q base URL must not be empty", trimmedID)
-	}
-	model := strings.TrimSpace(profile.Model)
-	if model == "" {
-		return llm.OpenAICompatibleClientConfig{}, fmt.Errorf("LLM profile %q model must not be empty", trimmedID)
-	}
-
-	return llm.OpenAICompatibleClientConfig{
-		BaseURL:        baseURL,
-		Model:          model,
-		APIKey:         profile.APIKey,
-		MaxRetries:     profile.MaxRetries,
-		RequestTimeout: time.Duration(profile.TimeoutSeconds) * time.Second,
-	}, nil
-}

internal/core/config/effective_config_test.go

@@ -3,7 +3,6 @@ package config
 import (
 	"strings"
 	"testing"
-	"time"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
@@ -28,6 +27,19 @@ func TestResolveRejectsEmptyAndUnknownPipelineID(t *testing.T) {
 	}
 }
 
+func TestResolveMaterializesDefaultExtractWorkersFromEffectiveTotal(t *testing.T) {
+	cfg := validConfig()
+	cfg.Concurrency.TotalLLM = 4
+
+	effective, err := cfg.Resolve(ResolveInput{PipelineID: "example", Catalog: fakeCatalog(t)})
+	if err != nil {
+		t.Fatalf("Resolve() error = %v, want nil", err)
+	}
+	if got := effective.Config.Concurrency.StageWorkers["extract"]; got != 4 {
+		t.Fatalf("effective extract workers = %d, want total concurrency 4", got)
+	}
+}
+
 func TestResolveLaneFilteringSuccessAndFailure(t *testing.T) {
 	effective, err := validConfig().Resolve(ResolveInput{
 		PipelineID: " example ",
@@ -98,6 +110,43 @@ func TestResolveSurfacesMissingCapabilityThroughCatalog(t *testing.T) {
 	}
 }
 
+func TestResolveCanBindSceneChunkerFromCatalog(t *testing.T) {
+	cfg := validConfig()
+	profile := cfg.Pipelines["example"]
+	profile.Chunk = pipeline.Binding("dnd/scenes")
+	lane := profile.Artifacts["events"]
+	profile.Artifacts = map[string]pipeline.ArtifactLaneProfile{"events": lane}
+	cfg.Pipelines["example"] = profile
+
+	catalog := fakeCatalog(t,
+		pipeline.ModuleSpec{
+			Key:      "fake/input",
+			Stage:    pipeline.StageInput,
+			Provides: []string{"source.transcript"},
+		},
+		pipeline.ModuleSpec{
+			Key:      "fake/extract",
+			Stage:    pipeline.StageExtract,
+			Requires: []string{"chunks", "source.transcript"},
+			Provides: []string{"artifact"},
+		},
+	)
+	mustRegisterChunker(t, catalog.Chunkers, pipeline.ModuleSpec{
+		Key:      "dnd/scenes",
+		Stage:    pipeline.StageChunk,
+		Requires: []string{"source.transcript"},
+		Provides: []string{"chunks", "chunks.scenes"},
+	})
+
+	effective, err := cfg.Resolve(ResolveInput{PipelineID: "example", Catalog: catalog})
+	if err != nil {
+		t.Fatalf("Resolve() error = %v, want nil", err)
+	}
+	if got := effective.ResolvedPipeline.Chunk.Module; got != "dnd/scenes" {
+		t.Fatalf("Chunk.Module = %q, want dnd/scenes", got)
+	}
+}
+
 func TestResolveDigestChangesWhenEffectiveConfigChanges(t *testing.T) {
 	cfg := validConfig()
 	first, err := cfg.Resolve(ResolveInput{PipelineID: "example", Catalog: fakeCatalog(t)})
@@ -120,7 +169,19 @@ func TestResolveDigestChangesWhenEffectiveConfigChanges(t *testing.T) {
 
 func TestResolveLLMProfileOverrideAppliesBeforeDigest(t *testing.T) {
 	cfg := validConfig()
-	cfg.LLMProfiles["runtime"] = LLMProfile{Provider: "openai-compatible"}
+	profile := cfg.Pipelines["example"]
+	profile.Input.LLMProfile = "input-profile"
+	profile.Output.LLMProfile = "output-profile"
+	lane := profile.Artifacts["events"]
+	lane.Merge.LLMProfile = "merge-profile"
+	lane.Extract.Validators = pipeline.ValidatorOverride{
+		Set: true,
+		Validators: []pipeline.ModuleBinding{
+			{Module: "fake/llm-validator", LLMProfile: "validator-profile"},
+		},
+	}
+	profile.Artifacts["events"] = lane
+	cfg.Pipelines["example"] = profile
 
 	base, err := cfg.Resolve(ResolveInput{PipelineID: "example", Catalog: fakeCatalog(t)})
 	if err != nil {
@@ -138,77 +199,43 @@ func TestResolveLLMProfileOverrideAppliesBeforeDigest(t *testing.T) {
 	if base.ResolvedPipeline.Digest == effective.ResolvedPipeline.Digest {
 		t.Fatalf("expected digest to change after LLM profile override")
 	}
-	for _, binding := range resolvedBindings(effective.ResolvedPipeline) {
+	for _, binding := range llmCapableBindings(effective.ResolvedPipeline) {
 		if binding.LLMProfile != "runtime" {
-			t.Fatalf("binding profile = %q, want runtime", binding.LLMProfile)
+			t.Fatalf("LLM-capable binding profile = %q, want runtime", binding.LLMProfile)
 		}
 	}
-
-	_, err = cfg.Resolve(ResolveInput{
-		PipelineID:         "example",
-		Catalog:            fakeCatalog(t),
-		LLMProfileOverride: "missing",
-	})
-	if err == nil || !strings.Contains(err.Error(), "LLM profile override") {
-		t.Fatalf("expected override profile error, got %v", err)
+	if effective.ResolvedPipeline.Input.LLMProfile != "input-profile" {
+		t.Fatalf("input profile = %q, want original input-profile", effective.ResolvedPipeline.Input.LLMProfile)
+	}
+	if effective.ResolvedPipeline.Output.LLMProfile != "output-profile" {
+		t.Fatalf("output profile = %q, want original output-profile", effective.ResolvedPipeline.Output.LLMProfile)
+	}
+	eventLane := effective.ResolvedPipeline.ArtifactLanes[0]
+	if eventLane.Merge.LLMProfile != "runtime" {
+		t.Fatalf("merge profile = %q, want runtime", eventLane.Merge.LLMProfile)
+	}
+	validatorChain := findEffectiveValidatorChain(effective.ResolvedPipeline.ValidatorChains, pipeline.StageExtract, "events", "fake/extract")
+	if validatorChain == nil || len(validatorChain.Validators) != 1 {
+		t.Fatalf("validator chain = %#v, want one extract validator", effective.ResolvedPipeline.ValidatorChains)
+	}
+	if validatorChain.Validators[0].Binding.LLMProfile != "validator-profile" {
+		t.Fatalf("validator profile = %q, want original validator-profile", validatorChain.Validators[0].Binding.LLMProfile)
 	}
 }
 
-func resolvedBindings(resolved pipeline.ResolvedPipeline) []pipeline.ModuleBinding {
-	bindings := []pipeline.ModuleBinding{resolved.Input, resolved.Chunk, resolved.Output}
+func findEffectiveValidatorChain(chains []pipeline.ResolvedValidatorChain, stage pipeline.ModuleStage, laneID string, module string) *pipeline.ResolvedValidatorChain {
+	for i := range chains {
+		if chains[i].Stage == stage && chains[i].LaneID == laneID && chains[i].ModuleKey == module {
+			return &chains[i]
+		}
+	}
+	return nil
+}
+
+func llmCapableBindings(resolved pipeline.ResolvedPipeline) []pipeline.ModuleBinding {
+	bindings := []pipeline.ModuleBinding{resolved.Chunk}
 	for _, lane := range resolved.ArtifactLanes {
 		bindings = append(bindings, lane.Extract, lane.Merge, lane.Normalize)
-		bindings = append(bindings, lane.Validators...)
 	}
 	return bindings
 }
-
-func TestOpenAICompatibleClientConfigRejectsIncompleteDefaultProfile(t *testing.T) {
-	cfg := Default()
-
-	_, err := cfg.OpenAICompatibleClientConfig("default")
-	if err == nil || !strings.Contains(err.Error(), "base URL") {
-		t.Fatalf("expected incomplete profile error, got %v", err)
-	}
-}
-
-func TestOpenAICompatibleClientConfigSuccess(t *testing.T) {
-	cfg := validConfig()
-	profile := cfg.LLMProfiles["default"]
-	profile.APIKey = "secret"
-	profile.TimeoutSeconds = 45
-	profile.MaxRetries = 4
-	cfg.LLMProfiles["default"] = profile
-
-	llmCfg, err := cfg.OpenAICompatibleClientConfig(" default ")
-	if err != nil {
-		t.Fatalf("OpenAICompatibleClientConfig: %v", err)
-	}
-
-	if llmCfg.BaseURL != "https://example.invalid/v1" || llmCfg.Model != "test-model" || llmCfg.APIKey != "secret" {
-		t.Fatalf("unexpected client config strings: %+v", llmCfg)
-	}
-	if llmCfg.MaxRetries != 4 {
-		t.Fatalf("unexpected max retries: %d", llmCfg.MaxRetries)
-	}
-	if llmCfg.RequestTimeout != 45*time.Second {
-		t.Fatalf("unexpected timeout: %s", llmCfg.RequestTimeout)
-	}
-}
-
-func TestOpenAICompatibleClientConfigRejectsUnknownAndUnsupportedProfiles(t *testing.T) {
-	_, err := validConfig().OpenAICompatibleClientConfig("missing")
-	if err == nil || !strings.Contains(err.Error(), "not configured") {
-		t.Fatalf("expected unknown profile error, got %v", err)
-	}
-
-	cfg := validConfig()
-	profile := cfg.LLMProfiles["default"]
-	profile.Provider = "unsupported"
-	cfg.LLMProfiles["default"] = profile
-
-	_, err = cfg.OpenAICompatibleClientConfig("default")
-	if err == nil || !strings.Contains(err.Error(), "provider") {
-		t.Fatalf("expected unsupported provider error, got %v", err)
-	}
-}

internal/core/config/env.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/diagnostics"
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
 func LoadFromEnv() (Config, error) {
@@ -30,43 +29,6 @@ func (c *Config) applyEnvOverridesWithLookup(lookup func(string) (string, bool))
 	if c == nil {
 		return fmt.Errorf("config must not be nil")
 	}
-	if c.LLMProfiles == nil {
-		c.LLMProfiles = map[string]LLMProfile{}
-	}
-
-	defaultProfile := c.LLMProfiles[pipeline.DefaultLLMProfile]
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_API_KEY"); ok {
-		defaultProfile.APIKey = raw
-	}
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_BASE_URL"); ok {
-		defaultProfile.BaseURL = strings.TrimSpace(raw)
-	}
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_MODEL"); ok {
-		defaultProfile.Model = strings.TrimSpace(raw)
-	}
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_TIMEOUT_SECONDS"); ok {
-		value, err := parseIntEnv("NOTARIUS_LLM_DEFAULT_TIMEOUT_SECONDS", raw)
-		if err != nil {
-			return err
-		}
-		defaultProfile.TimeoutSeconds = value
-	}
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_MAX_RETRIES"); ok {
-		value, err := parseIntEnv("NOTARIUS_LLM_DEFAULT_MAX_RETRIES", raw)
-		if err != nil {
-			return err
-		}
-		defaultProfile.MaxRetries = value
-	}
-	if raw, ok := lookup("NOTARIUS_LLM_DEFAULT_MAX_CONCURRENCY"); ok {
-		value, err := parseIntEnv("NOTARIUS_LLM_DEFAULT_MAX_CONCURRENCY", raw)
-		if err != nil {
-			return err
-		}
-		defaultProfile.MaxConcurrency = value
-	}
-	c.LLMProfiles[pipeline.DefaultLLMProfile] = defaultProfile
-
 	if raw, ok := lookup("NOTARIUS_TOTAL_LLM_CONCURRENCY"); ok {
 		value, err := parseIntEnv("NOTARIUS_TOTAL_LLM_CONCURRENCY", raw)
 		if err != nil {
@@ -74,12 +36,54 @@ func (c *Config) applyEnvOverridesWithLookup(lookup func(string) (string, bool))
 		}
 		c.Concurrency.TotalLLM = value
 	}
+	if raw, ok := lookup("NOTARIUS_STAGE_WORKERS_EXTRACT"); ok {
+		value, err := parseIntEnv("NOTARIUS_STAGE_WORKERS_EXTRACT", raw)
+		if err != nil {
+			return err
+		}
+		if c.Concurrency.StageWorkers == nil {
+			c.Concurrency.StageWorkers = make(map[string]int)
+		}
+		c.Concurrency.StageWorkers["extract"] = value
+		c.Concurrency.extractWorkersConfigured = true
+	}
+	c.Concurrency.recomputeStageWorkerDefaults()
 	if raw, ok := lookup("NOTARIUS_WORK_DIR"); ok {
 		c.Diagnostics.WorkDir = strings.TrimSpace(raw)
 	}
 	if raw, ok := lookup("NOTARIUS_DIAGNOSTICS_RETENTION"); ok {
 		c.Diagnostics.Retention = diagnostics.RetentionMode(strings.TrimSpace(raw))
 	}
+	if raw, ok := lookup("NOTARIUS_WORKSPACE_DIR"); ok {
+		c.Workspace.Directory = strings.TrimSpace(raw)
+	}
+	if raw, ok := lookup("NOTARIUS_WORKSPACE_DIAGNOSTICS_ENABLED"); ok {
+		value, err := parseBoolEnv("NOTARIUS_WORKSPACE_DIAGNOSTICS_ENABLED", raw)
+		if err != nil {
+			return err
+		}
+		c.Workspace.Diagnostics.Enabled = value
+		c.Workspace.Diagnostics.enabledSet = true
+	}
+	if raw, ok := lookup("NOTARIUS_WORKSPACE_DIAGNOSTICS_RETENTION"); ok {
+		c.Workspace.Diagnostics.Retention = diagnostics.RetentionMode(strings.TrimSpace(raw))
+		c.Workspace.Diagnostics.retentionSet = true
+	}
+	if raw, ok := lookup("NOTARIUS_WORKSPACE_RESUME_ENABLED"); ok {
+		value, err := parseBoolEnv("NOTARIUS_WORKSPACE_RESUME_ENABLED", raw)
+		if err != nil {
+			return err
+		}
+		c.Workspace.Resume.Enabled = value
+	}
+	if raw, ok := lookup("NOTARIUS_WORKSPACE_DEBUG_ENABLED"); ok {
+		value, err := parseBoolEnv("NOTARIUS_WORKSPACE_DEBUG_ENABLED", raw)
+		if err != nil {
+			return err
+		}
+		c.Workspace.Debug.Enabled = value
+	}
+	c.RecomputeEffectiveDiagnostics()
 	return nil
 }
 
@@ -90,3 +94,11 @@ func parseIntEnv(name string, raw string) (int, error) {
 	}
 	return value, nil
 }
+
+func parseBoolEnv(name string, raw string) (bool, error) {
+	value, err := strconv.ParseBool(strings.TrimSpace(raw))
+	if err != nil {
+		return false, fmt.Errorf("%s: must be a boolean", name)
+	}
+	return value, nil
+}

internal/core/config/env_test.go

@@ -8,62 +8,176 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
-func TestApplyEnvOverridesOperationalAndLLMValues(t *testing.T) {
+func TestApplyEnvOverridesOperationalValues(t *testing.T) {
 	cfg := Default()
 	cfg.Pipelines["example"] = pipeline.PipelineProfile{ID: "example", Input: pipeline.Binding("before")}
 
 	err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{
-		"NOTARIUS_LLM_DEFAULT_API_KEY":         "secret",
-		"NOTARIUS_LLM_DEFAULT_BASE_URL":        "https://example.invalid/v1",
-		"NOTARIUS_LLM_DEFAULT_MODEL":           "test-model",
-		"NOTARIUS_LLM_DEFAULT_TIMEOUT_SECONDS": "120",
-		"NOTARIUS_LLM_DEFAULT_MAX_RETRIES":     "5",
-		"NOTARIUS_LLM_DEFAULT_MAX_CONCURRENCY": "2",
-		"NOTARIUS_TOTAL_LLM_CONCURRENCY":       "3",
-		"NOTARIUS_WORK_DIR":                    "/tmp/notarius-env",
-		"NOTARIUS_DIAGNOSTICS_RETENTION":       "never",
-		"NOTARIUS_PIPELINE_INPUT":              "after",
+		"NOTARIUS_TOTAL_LLM_CONCURRENCY":           "3",
+		"NOTARIUS_STAGE_WORKERS_EXTRACT":           "2",
+		"NOTARIUS_WORK_DIR":                        "/tmp/notarius-env",
+		"NOTARIUS_DIAGNOSTICS_RETENTION":           "never",
+		"NOTARIUS_WORKSPACE_DIR":                   "/var/lib/notarius-env",
+		"NOTARIUS_WORKSPACE_DIAGNOSTICS_ENABLED":   "false",
+		"NOTARIUS_WORKSPACE_DIAGNOSTICS_RETENTION": "always",
+		"NOTARIUS_WORKSPACE_RESUME_ENABLED":        "true",
+		"NOTARIUS_WORKSPACE_DEBUG_ENABLED":         "true",
+		"NOTARIUS_PIPELINE_INPUT":                  "after",
 	}))
 	if err != nil {
 		t.Fatalf("ApplyEnvOverrides: %v", err)
 	}
 
-	profile := cfg.LLMProfiles[pipeline.DefaultLLMProfile]
-	if profile.APIKey != "secret" || profile.BaseURL != "https://example.invalid/v1" || profile.Model != "test-model" {
-		t.Fatalf("unexpected LLM profile strings: %+v", profile)
-	}
-	if profile.TimeoutSeconds != 120 || profile.MaxRetries != 5 || profile.MaxConcurrency != 2 {
-		t.Fatalf("unexpected LLM profile numeric values: %+v", profile)
+	if cfg.Scriptorium.ProfileDir != "" || cfg.Scriptorium.ProfileFile != "" {
+		t.Fatalf("LLM environment overrides must not change Scriptorium config: %+v", cfg.Scriptorium)
 	}
 	if cfg.Concurrency.TotalLLM != 3 {
 		t.Fatalf("unexpected total concurrency: %d", cfg.Concurrency.TotalLLM)
 	}
-	if cfg.Diagnostics.WorkDir != "/tmp/notarius-env" || cfg.Diagnostics.Retention != diagnostics.RetentionNever {
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 2 {
+		t.Fatalf("extract workers = %d, want 2", got)
+	}
+	if cfg.Workspace.Directory != "/var/lib/notarius-env" {
+		t.Fatalf("unexpected workspace directory: %q", cfg.Workspace.Directory)
+	}
+	if cfg.DiagnosticsEnabled() {
+		t.Fatalf("expected workspace diagnostics disabled")
+	}
+	if cfg.Diagnostics.WorkDir != "/var/lib/notarius-env/diagnostics" || cfg.Diagnostics.Retention != diagnostics.RetentionAlways {
 		t.Fatalf("unexpected diagnostics config: %+v", cfg.Diagnostics)
 	}
+	if !cfg.Workspace.Resume.Enabled {
+		t.Fatalf("expected workspace resume enabled")
+	}
+	if !cfg.Workspace.Debug.Enabled {
+		t.Fatalf("expected workspace debug enabled")
+	}
 	if cfg.Pipelines["example"].Input.Module != "before" {
 		t.Fatalf("environment overrides must not change pipeline wiring: %+v", cfg.Pipelines["example"])
 	}
 }
 
 func TestApplyEnvOverridesRejectsInvalidIntegers(t *testing.T) {
+	for _, name := range []string{"NOTARIUS_TOTAL_LLM_CONCURRENCY", "NOTARIUS_STAGE_WORKERS_EXTRACT"} {
+		t.Run(name, func(t *testing.T) {
+			cfg := Default()
+			err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{name: "many"}))
+			if err == nil || !strings.Contains(err.Error(), name) {
+				t.Fatalf("expected named integer error, got %v", err)
+			}
+		})
+	}
+}
+
+func TestStageWorkerEnvironmentPrecedenceAndDefaulting(t *testing.T) {
+	fileCfg, err := ParseFileConfigYAML([]byte(`
+version: 2
+concurrency:
+  total_llm: 4
+  stage_workers:
+    extract: 2
+`))
+	if err != nil {
+		t.Fatalf("ParseFileConfigYAML() error = %v", err)
+	}
 	cfg := Default()
+	if err := cfg.applyFileConfigWithLookup(fileCfg, emptyLookup); err != nil {
+		t.Fatalf("ApplyFileConfig() error = %v", err)
+	}
+	if err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{
+		"NOTARIUS_TOTAL_LLM_CONCURRENCY": "5",
+		"NOTARIUS_STAGE_WORKERS_EXTRACT": "3",
+	})); err != nil {
+		t.Fatalf("ApplyEnvOverrides() error = %v", err)
+	}
+	if cfg.Concurrency.TotalLLM != 5 || cfg.Concurrency.StageWorkers["extract"] != 3 {
+		t.Fatalf("effective concurrency = %#v, want total 5 and extract 3", cfg.Concurrency)
+	}
+	if err := cfg.Validate(); err != nil {
+		t.Fatalf("Validate(overridden) error = %v, want nil", err)
+	}
+
+	defaulted := Default()
+	if err := defaulted.applyEnvOverridesWithLookup(mapLookup(map[string]string{"NOTARIUS_TOTAL_LLM_CONCURRENCY": "6"})); err != nil {
+		t.Fatalf("ApplyEnvOverrides(defaulted) error = %v", err)
+	}
+	if got := defaulted.Concurrency.StageWorkers["extract"]; got != 6 {
+		t.Fatalf("defaulted extract workers = %d, want effective total 6", got)
+	}
+}
+
+func TestStageWorkerRangeValidationUsesFinalEnvironmentTotal(t *testing.T) {
+	fileCfg, err := ParseFileConfigYAML([]byte(`
+version: 2
+concurrency:
+  total_llm: 4
+  stage_workers:
+    extract: 5
+`))
+	if err != nil {
+		t.Fatalf("ParseFileConfigYAML() error = %v", err)
+	}
+	cfg := Default()
+	if err := cfg.applyFileConfigWithLookup(fileCfg, emptyLookup); err != nil {
+		t.Fatalf("ApplyFileConfig() error = %v", err)
+	}
+	if err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{"NOTARIUS_TOTAL_LLM_CONCURRENCY": "6"})); err != nil {
+		t.Fatalf("ApplyEnvOverrides() error = %v", err)
+	}
+	if err := cfg.Validate(); err != nil {
+		t.Fatalf("Validate() error = %v, want final total to make extract workers valid", err)
+	}
+}
+
+func TestApplyEnvOverridesRejectsInvalidBooleans(t *testing.T) {
+	for _, name := range []string{
+		"NOTARIUS_WORKSPACE_DIAGNOSTICS_ENABLED",
+		"NOTARIUS_WORKSPACE_RESUME_ENABLED",
+		"NOTARIUS_WORKSPACE_DEBUG_ENABLED",
+	} {
+		t.Run(name, func(t *testing.T) {
+			cfg := Default()
+			err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{name: "maybe"}))
+			if err == nil || !strings.Contains(err.Error(), name) {
+				t.Fatalf("expected named boolean error, got %v", err)
+			}
+		})
+	}
+}
+
+func TestApplyEnvOverridesLegacyDiagnosticsRemainCompatibleWithoutWorkspace(t *testing.T) {
+	cfg := Default()
+
 	err := cfg.applyEnvOverridesWithLookup(mapLookup(map[string]string{
-		"NOTARIUS_TOTAL_LLM_CONCURRENCY": "many",
+		"NOTARIUS_WORK_DIR":              "/tmp/notarius-env",
+		"NOTARIUS_DIAGNOSTICS_RETENTION": "never",
 	}))
-	if err == nil || !strings.Contains(err.Error(), "NOTARIUS_TOTAL_LLM_CONCURRENCY") {
-		t.Fatalf("expected named integer error, got %v", err)
+	if err != nil {
+		t.Fatalf("ApplyEnvOverrides: %v", err)
+	}
+
+	if cfg.Diagnostics.WorkDir != "/tmp/notarius-env" {
+		t.Fatalf("diagnostics work dir = %q, want legacy env", cfg.Diagnostics.WorkDir)
+	}
+	if cfg.Diagnostics.Retention != diagnostics.RetentionNever {
+		t.Fatalf("diagnostics retention = %q, want legacy env", cfg.Diagnostics.Retention)
 	}
 }
 
 func TestLoadFromEnvUsesDefaultConfig(t *testing.T) {
-	t.Setenv("NOTARIUS_LLM_DEFAULT_MODEL", "env-model")
+	t.Setenv("NOTARIUS_TOTAL_LLM_CONCURRENCY", "2")
 
 	cfg, err := LoadFromEnv()
 	if err != nil {
 		t.Fatalf("LoadFromEnv: %v", err)
 	}
-	if cfg.LLMProfiles[pipeline.DefaultLLMProfile].Model != "env-model" {
-		t.Fatalf("expected env model, got %+v", cfg.LLMProfiles[pipeline.DefaultLLMProfile])
+	if cfg.Scriptorium.ProfileDir != "" || cfg.Scriptorium.ProfileFile != "" {
+		t.Fatalf("unexpected Scriptorium config from env: %+v", cfg.Scriptorium)
+	}
+	if cfg.Concurrency.TotalLLM != 2 {
+		t.Fatalf("expected env concurrency override, got %+v", cfg.Concurrency)
+	}
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 2 {
+		t.Fatalf("expected extract workers to default to total, got %d", got)
 	}
 }

internal/core/config/file_config.go

@@ -4,41 +4,34 @@ import (
 	"bytes"
 	"fmt"
 	"os"
-	"regexp"
 	"sort"
 	"strings"
-	"time"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/diagnostics"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 	"gopkg.in/yaml.v3"
 )
 
-var envVarNamePattern = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)
-
 type FileConfig struct {
 	Version     int                            `yaml:"version"`
-	LLMProfiles map[string]FileLLMProfile      `yaml:"llm_profiles,omitempty"`
+	Scriptorium *FileScriptoriumConfig         `yaml:"scriptorium,omitempty"`
 	Pipelines   map[string]FilePipelineProfile `yaml:"pipelines,omitempty"`
 	Concurrency *FileConcurrencyConfig         `yaml:"concurrency,omitempty"`
 	Diagnostics *FileDiagnosticsConfig         `yaml:"diagnostics,omitempty"`
+	Workspace   *FileWorkspaceConfig           `yaml:"workspace,omitempty"`
 }
 
-type FileLLMProfile struct {
-	Provider       *string              `yaml:"provider,omitempty"`
-	BaseURL        *string              `yaml:"base_url,omitempty"`
-	Model          *string              `yaml:"model,omitempty"`
-	APIKeyEnv      *string              `yaml:"api_key_env,omitempty"`
-	Timeout        *fileDurationSeconds `yaml:"timeout,omitempty"`
-	MaxRetries     *int                 `yaml:"max_retries,omitempty"`
-	MaxConcurrency *int                 `yaml:"max_concurrency,omitempty"`
+type FileScriptoriumConfig struct {
+	ProfileDir  *string `yaml:"profile_dir,omitempty"`
+	ProfileFile *string `yaml:"profile_file,omitempty"`
 }
 
 type FilePipelineProfile struct {
-	Input     fileModuleBinding                  `yaml:"input"`
-	Chunk     *fileModuleBinding                 `yaml:"chunk,omitempty"`
-	Artifacts map[string]FileArtifactLaneProfile `yaml:"artifacts,omitempty"`
-	Output    *fileModuleBinding                 `yaml:"output,omitempty"`
+	Input      fileModuleBinding                  `yaml:"input"`
+	Chunk      *fileModuleBinding                 `yaml:"chunk,omitempty"`
+	Artifacts  map[string]FileArtifactLaneProfile `yaml:"artifacts,omitempty"`
+	Output     *fileModuleBinding                 `yaml:"output,omitempty"`
+	References map[string]string                  `yaml:"references,omitempty"`
 }
 
 type FileArtifactLaneProfile struct {
@@ -46,10 +39,12 @@ type FileArtifactLaneProfile struct {
 	Merge      *fileModuleBinding  `yaml:"merge,omitempty"`
 	Normalize  *fileModuleBinding  `yaml:"normalize,omitempty"`
 	Validators []fileModuleBinding `yaml:"validators,omitempty"`
+	References map[string]string   `yaml:"references,omitempty"`
 }
 
 type FileConcurrencyConfig struct {
-	TotalLLM *int `yaml:"total_llm,omitempty"`
+	TotalLLM     *int           `yaml:"total_llm,omitempty"`
+	StageWorkers map[string]int `yaml:"stage_workers,omitempty"`
 }
 
 type FileDiagnosticsConfig struct {
@@ -57,46 +52,29 @@ type FileDiagnosticsConfig struct {
 	Retention *string `yaml:"retention,omitempty"`
 }
 
-type fileDurationSeconds struct {
-	seconds int
+type FileWorkspaceConfig struct {
+	Directory   *string                         `yaml:"directory,omitempty"`
+	Diagnostics *FileWorkspaceDiagnosticsConfig `yaml:"diagnostics,omitempty"`
+	Resume      *FileWorkspaceEnabledConfig     `yaml:"resume,omitempty"`
+	Debug       *FileWorkspaceEnabledConfig     `yaml:"debug,omitempty"`
 }
 
-func (d *fileDurationSeconds) UnmarshalYAML(node *yaml.Node) error {
-	if node.Kind != yaml.ScalarNode {
-		return fmt.Errorf("must be an integer seconds value or duration string")
-	}
-	if node.Tag == "!!int" {
-		var seconds int
-		if err := node.Decode(&seconds); err != nil {
-			return fmt.Errorf("must be an integer seconds value or duration string")
-		}
-		d.seconds = seconds
-		return nil
-	}
-
-	var raw string
-	if err := node.Decode(&raw); err != nil {
-		return fmt.Errorf("must be an integer seconds value or duration string")
-	}
-	duration, err := time.ParseDuration(strings.TrimSpace(raw))
-	if err != nil {
-		return fmt.Errorf("invalid duration %q", raw)
-	}
-	if duration%time.Second != 0 {
-		return fmt.Errorf("duration %q must resolve to whole seconds", raw)
-	}
-	d.seconds = int(duration / time.Second)
-	return nil
+type FileWorkspaceDiagnosticsConfig struct {
+	Enabled   *bool   `yaml:"enabled,omitempty"`
+	Retention *string `yaml:"retention,omitempty"`
 }
 
-func (d fileDurationSeconds) Seconds() int {
-	return d.seconds
+type FileWorkspaceEnabledConfig struct {
+	Enabled *bool `yaml:"enabled,omitempty"`
 }
 
 type fileModuleBinding struct {
 	Module     string
 	LLMProfile string
+	Retries    int
 	Options    map[string]any
+	References map[string]string
+	Validators pipeline.ValidatorOverride
 }
 
 func (b *fileModuleBinding) UnmarshalYAML(node *yaml.Node) error {
@@ -125,12 +103,34 @@ func (b *fileModuleBinding) UnmarshalYAML(node *yaml.Node) error {
 					return err
 				}
 				b.LLMProfile = strings.TrimSpace(llmProfile)
+			case "retries":
+				var retries int
+				if err := valueNode.Decode(&retries); err != nil {
+					return err
+				}
+				b.Retries = retries
 			case "options":
 				var options map[string]any
 				if err := valueNode.Decode(&options); err != nil {
 					return err
 				}
 				b.Options = normalizeOptions(options)
+			case "references":
+				var references map[string]string
+				if err := valueNode.Decode(&references); err != nil {
+					return err
+				}
+				b.References = references
+			case "validators":
+				b.Validators.Set = true
+				var validators []fileModuleBinding
+				if err := valueNode.Decode(&validators); err != nil {
+					return err
+				}
+				b.Validators.Validators = make([]pipeline.ModuleBinding, len(validators))
+				for i, validator := range validators {
+					b.Validators.Validators[i] = validator.toPipelineBinding()
+				}
 			default:
 				return fmt.Errorf("field %s not found in module binding", keyNode.Value)
 			}
@@ -145,7 +145,10 @@ func (b fileModuleBinding) toPipelineBinding() pipeline.ModuleBinding {
 	return pipeline.ModuleBinding{
 		Module:     strings.TrimSpace(b.Module),
 		LLMProfile: strings.TrimSpace(b.LLMProfile),
+		Retries:    b.Retries,
 		Options:    cloneOptions(b.Options),
+		References: normalizedStringMap(b.References),
+		Validators: b.Validators,
 	}
 }
 
@@ -186,23 +189,17 @@ func (c *Config) ApplyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 }
 
 func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(string) (string, bool)) error {
+	_ = lookup
 	if c == nil {
 		return fmt.Errorf("config must not be nil")
 	}
 	if fileCfg.Version != SupportedFileConfigVersion {
 		return fmt.Errorf("unsupported config version %d", fileCfg.Version)
 	}
-	if c.LLMProfiles == nil {
-		c.LLMProfiles = map[string]LLMProfile{}
-	}
 	if c.Pipelines == nil {
 		c.Pipelines = map[string]pipeline.PipelineProfile{}
 	}
 
-	profileIDs, rawLLMProfileIDs, err := normalizedMapKeys(fileCfg.LLMProfiles, "llm profile id")
-	if err != nil {
-		return err
-	}
 	pipelineIDs, rawPipelineIDs, err := normalizedMapKeys(fileCfg.Pipelines, "pipeline id")
 	if err != nil {
 		return err
@@ -212,38 +209,66 @@ func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 		if _, _, err := normalizedMapKeys(filePipeline.Artifacts, fmt.Sprintf("pipeline %q artifact lane id", pipelineID)); err != nil {
 			return err
 		}
+		if _, _, err := normalizedMapKeys(filePipeline.References, fmt.Sprintf("pipeline %q reference slot", pipelineID)); err != nil {
+			return err
+		}
+		if filePipeline.Chunk != nil {
+			if _, _, err := normalizedMapKeys(filePipeline.Chunk.References, fmt.Sprintf("pipeline %q chunk reference slot", pipelineID)); err != nil {
+				return err
+			}
+		}
+		if _, _, err := normalizedMapKeys(filePipeline.Input.References, fmt.Sprintf("pipeline %q input reference slot", pipelineID)); err != nil {
+			return err
+		}
+		if filePipeline.Output != nil {
+			if _, _, err := normalizedMapKeys(filePipeline.Output.References, fmt.Sprintf("pipeline %q output reference slot", pipelineID)); err != nil {
+				return err
+			}
+		}
+		for rawLaneID, fileLane := range filePipeline.Artifacts {
+			laneID := strings.TrimSpace(rawLaneID)
+			if laneID == "" {
+				continue
+			}
+			if _, _, err := normalizedMapKeys(fileLane.References, fmt.Sprintf("pipeline %q lane %q reference slot", pipelineID, laneID)); err != nil {
+				return err
+			}
+			if _, _, err := normalizedMapKeys(fileLane.Extract.References, fmt.Sprintf("pipeline %q lane %q extract reference slot", pipelineID, laneID)); err != nil {
+				return err
+			}
+			if fileLane.Merge != nil {
+				if _, _, err := normalizedMapKeys(fileLane.Merge.References, fmt.Sprintf("pipeline %q lane %q merge reference slot", pipelineID, laneID)); err != nil {
+					return err
+				}
+			}
+			if fileLane.Normalize != nil {
+				if _, _, err := normalizedMapKeys(fileLane.Normalize.References, fmt.Sprintf("pipeline %q lane %q normalize reference slot", pipelineID, laneID)); err != nil {
+					return err
+				}
+			}
+			for i, validator := range fileLane.Validators {
+				if _, _, err := normalizedMapKeys(validator.References, fmt.Sprintf("pipeline %q lane %q validator[%d] reference slot", pipelineID, laneID, i)); err != nil {
+					return err
+				}
+			}
+		}
 	}
 
-	for _, profileID := range profileIDs {
-		fileProfile := fileCfg.LLMProfiles[rawLLMProfileIDs[profileID]]
-		profile := c.LLMProfiles[profileID]
-		if fileProfile.Provider != nil {
-			profile.Provider = strings.TrimSpace(*fileProfile.Provider)
-		}
-		if fileProfile.BaseURL != nil {
-			profile.BaseURL = strings.TrimSpace(*fileProfile.BaseURL)
-		}
-		if fileProfile.Model != nil {
-			profile.Model = strings.TrimSpace(*fileProfile.Model)
-		}
-		if fileProfile.APIKeyEnv != nil {
-			apiKey, err := resolveAPIKeyEnv(*fileProfile.APIKeyEnv, lookup)
-			if err != nil {
-				return fmt.Errorf("llm_profiles.%s.api_key_env: %w", profileID, err)
+	if fileCfg.Scriptorium != nil {
+		if fileCfg.Scriptorium.ProfileDir != nil {
+			value := strings.TrimSpace(*fileCfg.Scriptorium.ProfileDir)
+			if value == "" {
+				return fmt.Errorf("scriptorium.profile_dir must not be empty when set")
 			}
-			profile.APIKeyEnv = strings.TrimSpace(*fileProfile.APIKeyEnv)
-			profile.APIKey = apiKey
+			c.Scriptorium.ProfileDir = value
 		}
-		if fileProfile.Timeout != nil {
-			profile.TimeoutSeconds = fileProfile.Timeout.Seconds()
+		if fileCfg.Scriptorium.ProfileFile != nil {
+			value := strings.TrimSpace(*fileCfg.Scriptorium.ProfileFile)
+			if value == "" {
+				return fmt.Errorf("scriptorium.profile_file must not be empty when set")
+			}
+			c.Scriptorium.ProfileFile = value
 		}
-		if fileProfile.MaxRetries != nil {
-			profile.MaxRetries = *fileProfile.MaxRetries
-		}
-		if fileProfile.MaxConcurrency != nil {
-			profile.MaxConcurrency = *fileProfile.MaxConcurrency
-		}
-		c.LLMProfiles[profileID] = profile
 	}
 
 	for _, pipelineID := range pipelineIDs {
@@ -253,9 +278,10 @@ func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 			return err
 		}
 		profile := pipeline.PipelineProfile{
-			ID:        pipelineID,
-			Input:     filePipeline.Input.toPipelineBinding(),
-			Artifacts: make(map[string]pipeline.ArtifactLaneProfile, len(filePipeline.Artifacts)),
+			ID:         pipelineID,
+			Input:      filePipeline.Input.toPipelineBinding(),
+			Artifacts:  make(map[string]pipeline.ArtifactLaneProfile, len(filePipeline.Artifacts)),
+			References: normalizedStringMap(filePipeline.References),
 		}
 		if filePipeline.Chunk != nil {
 			profile.Chunk = filePipeline.Chunk.toPipelineBinding()
@@ -265,8 +291,11 @@ func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 		}
 		for _, laneID := range laneIDs {
 			fileLane := filePipeline.Artifacts[rawLaneIDs[laneID]]
+			extract := fileLane.Extract.toPipelineBinding()
+			extract.References = mergeStringMaps(normalizedStringMap(fileLane.References), extract.References)
 			lane := pipeline.ArtifactLaneProfile{
-				Extract: fileLane.Extract.toPipelineBinding(),
+				Extract:    extract,
+				References: normalizedStringMap(fileLane.References),
 			}
 			if fileLane.Merge != nil {
 				lane.Merge = fileLane.Merge.toPipelineBinding()
@@ -288,6 +317,15 @@ func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 	if fileCfg.Concurrency != nil && fileCfg.Concurrency.TotalLLM != nil {
 		c.Concurrency.TotalLLM = *fileCfg.Concurrency.TotalLLM
 	}
+	if fileCfg.Concurrency != nil && fileCfg.Concurrency.StageWorkers != nil {
+		workers, configured, err := normalizeStageWorkers(fileCfg.Concurrency.StageWorkers)
+		if err != nil {
+			return err
+		}
+		c.Concurrency.StageWorkers = workers
+		c.Concurrency.extractWorkersConfigured = configured
+	}
+	c.Concurrency.recomputeStageWorkerDefaults()
 	if fileCfg.Diagnostics != nil {
 		if fileCfg.Diagnostics.WorkDir != nil {
 			c.Diagnostics.WorkDir = strings.TrimSpace(*fileCfg.Diagnostics.WorkDir)
@@ -296,10 +334,52 @@ func (c *Config) applyFileConfigWithLookup(fileCfg FileConfig, lookup func(strin
 			c.Diagnostics.Retention = diagnostics.RetentionMode(strings.TrimSpace(*fileCfg.Diagnostics.Retention))
 		}
 	}
+	if fileCfg.Workspace != nil {
+		if fileCfg.Workspace.Directory != nil {
+			c.Workspace.Directory = strings.TrimSpace(*fileCfg.Workspace.Directory)
+		}
+		if fileCfg.Workspace.Diagnostics != nil {
+			if fileCfg.Workspace.Diagnostics.Enabled != nil {
+				c.Workspace.Diagnostics.Enabled = *fileCfg.Workspace.Diagnostics.Enabled
+				c.Workspace.Diagnostics.enabledSet = true
+			}
+			if fileCfg.Workspace.Diagnostics.Retention != nil {
+				c.Workspace.Diagnostics.Retention = diagnostics.RetentionMode(strings.TrimSpace(*fileCfg.Workspace.Diagnostics.Retention))
+				c.Workspace.Diagnostics.retentionSet = true
+			}
+		}
+		if fileCfg.Workspace.Resume != nil && fileCfg.Workspace.Resume.Enabled != nil {
+			c.Workspace.Resume.Enabled = *fileCfg.Workspace.Resume.Enabled
+		}
+		if fileCfg.Workspace.Debug != nil && fileCfg.Workspace.Debug.Enabled != nil {
+			c.Workspace.Debug.Enabled = *fileCfg.Workspace.Debug.Enabled
+		}
+	}
+	c.RecomputeEffectiveDiagnostics()
 
 	return nil
 }
 
+func normalizeStageWorkers(values map[string]int) (map[string]int, bool, error) {
+	workers := make(map[string]int, len(values))
+	configured := false
+	for rawKey, value := range values {
+		key := strings.TrimSpace(rawKey)
+		if key == "" {
+			return nil, false, fmt.Errorf("concurrency.stage_workers key must not be empty")
+		}
+		if key != "extract" {
+			return nil, false, fmt.Errorf("concurrency.stage_workers key %q is not supported", rawKey)
+		}
+		if _, exists := workers[key]; exists {
+			return nil, false, fmt.Errorf("concurrency.stage_workers key %q is duplicated after trimming", key)
+		}
+		workers[key] = value
+		configured = true
+	}
+	return workers, configured, nil
+}
+
 func normalizedMapKeys[T any](values map[string]T, keyName string) ([]string, map[string]string, error) {
 	keys := make([]string, 0, len(values))
 	rawByNormalized := make(map[string]string, len(values))
@@ -318,19 +398,37 @@ func normalizedMapKeys[T any](values map[string]T, keyName string) ([]string, ma
 	return keys, rawByNormalized, nil
 }
 
-func resolveAPIKeyEnv(envName string, lookup func(string) (string, bool)) (string, error) {
-	name := strings.TrimSpace(envName)
-	if name == "" {
-		return "", fmt.Errorf("must not be empty")
+func normalizedStringMap(values map[string]string) map[string]string {
+	if len(values) == 0 {
+		return nil
 	}
-	if !envVarNamePattern.MatchString(name) {
-		return "", fmt.Errorf("must be an environment variable name")
+	out := make(map[string]string, len(values))
+	keys := make([]string, 0, len(values))
+	rawByNormalized := make(map[string]string, len(values))
+	for rawKey := range values {
+		key := strings.TrimSpace(rawKey)
+		rawByNormalized[key] = rawKey
+		keys = append(keys, key)
 	}
-	value, ok := lookup(name)
-	if !ok {
-		return "", fmt.Errorf("%s is not set", name)
+	sort.Strings(keys)
+	for _, key := range keys {
+		out[key] = strings.TrimSpace(values[rawByNormalized[key]])
 	}
-	return value, nil
+	return out
+}
+
+func mergeStringMaps(base map[string]string, override map[string]string) map[string]string {
+	if len(base) == 0 && len(override) == 0 {
+		return nil
+	}
+	out := make(map[string]string, len(base)+len(override))
+	for key, value := range base {
+		out[key] = value
+	}
+	for key, value := range override {
+		out[key] = value
+	}
+	return out
 }
 
 func normalizeOptions(options map[string]any) map[string]any {

internal/core/config/file_config_test.go

@@ -12,7 +12,7 @@ import (
 
 func TestParseMinimalValidConfig(t *testing.T) {
 	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
+version: 2
 `))
 	if err != nil {
 		t.Fatalf("ParseFileConfigYAML: %v", err)
@@ -24,7 +24,7 @@ version: 1
 
 func TestLoadFileConfig(t *testing.T) {
 	path := filepath.Join(t.TempDir(), "config.yml")
-	if err := os.WriteFile(path, []byte("version: 1\n"), 0o644); err != nil {
+	if err := os.WriteFile(path, []byte("version: 2\n"), 0o644); err != nil {
 		t.Fatalf("write config: %v", err)
 	}
 
@@ -39,7 +39,7 @@ func TestLoadFileConfig(t *testing.T) {
 
 func TestParseFileConfigRejectsUnknownYAMLFields(t *testing.T) {
 	_, err := ParseFileConfigYAML([]byte(`
-version: 1
+version: 2
 unexpected: true
 `))
 	if err == nil || !strings.Contains(err.Error(), "field unexpected not found") {
@@ -49,7 +49,7 @@ unexpected: true
 
 func TestParseFileConfigRejectsUnknownModuleBindingFields(t *testing.T) {
 	_, err := ParseFileConfigYAML([]byte(`
-version: 1
+version: 2
 pipelines:
   example:
     input:
@@ -70,8 +70,8 @@ func TestParseFileConfigRejectsMissingAndUnsupportedVersion(t *testing.T) {
 		data string
 		want string
 	}{
-		{name: "missing", data: `llm_profiles: {}`, want: "version is required"},
-		{name: "unsupported", data: `version: 2`, want: "unsupported config version"},
+		{name: "missing", data: `scriptorium: {}`, want: "version is required"},
+		{name: "unsupported", data: `version: 1`, want: "unsupported config version"},
 	}
 
 	for _, tc := range tests {
@@ -84,14 +84,50 @@ func TestParseFileConfigRejectsMissingAndUnsupportedVersion(t *testing.T) {
 	}
 }
 
+func TestParseFileConfigRejectsStaleLLMProfiles(t *testing.T) {
+	_, err := ParseFileConfigYAML([]byte(`
+version: 2
+llm_profiles:
+  default: {}
+`))
+	if err == nil || !strings.Contains(err.Error(), "llm_profiles") {
+		t.Fatalf("expected stale llm_profiles error, got %v", err)
+	}
+}
+
+func TestParseFileConfigScriptoriumProfileSources(t *testing.T) {
+	t.Run("profile dir", func(t *testing.T) {
+		cfg := parseAndApplyConfig(t, `
+version: 2
+scriptorium:
+  profile_dir: ./profiles
+`)
+		if cfg.Scriptorium.ProfileDir != "./profiles" || cfg.Scriptorium.ProfileFile != "" {
+			t.Fatalf("Scriptorium = %+v, want profile_dir", cfg.Scriptorium)
+		}
+	})
+
+	t.Run("profile file", func(t *testing.T) {
+		cfg := parseAndApplyConfig(t, `
+version: 2
+scriptorium:
+  profile_file: ./profiles.yml
+`)
+		if cfg.Scriptorium.ProfileFile != "./profiles.yml" || cfg.Scriptorium.ProfileDir != "" {
+			t.Fatalf("Scriptorium = %+v, want profile_file", cfg.Scriptorium)
+		}
+	})
+}
+
 func TestParseFileConfigModuleBindingForms(t *testing.T) {
 	cfg := parseAndApplyConfig(t, `
-version: 1
+version: 2
 pipelines:
   example:
     input: fake/input
     chunk:
       module: generic
+      retries: 2
       options:
         size: 10
         flags:
@@ -103,9 +139,12 @@ pipelines:
         extract:
           module: fake/extract
           llm_profile: fast
+          retries: 3
           options:
             temperature: 0
-        merge: appendorder
+        merge:
+          module: appendorder
+          retries: 1
         normalize:
           module: noop
     output: json
@@ -118,6 +157,9 @@ pipelines:
 	if profile.Chunk.Module != "generic" {
 		t.Fatalf("unexpected chunk binding: %+v", profile.Chunk)
 	}
+	if profile.Chunk.Retries != 2 {
+		t.Fatalf("chunk retries = %d, want 2", profile.Chunk.Retries)
+	}
 	if profile.Chunk.Options["size"] != 10 {
 		t.Fatalf("expected chunk options to preserve scalar, got %#v", profile.Chunk.Options)
 	}
@@ -133,6 +175,9 @@ pipelines:
 	if lane.Extract.Module != "fake/extract" || lane.Extract.LLMProfile != "fast" {
 		t.Fatalf("unexpected extract binding: %+v", lane.Extract)
 	}
+	if lane.Extract.Retries != 3 || lane.Merge.Retries != 1 {
+		t.Fatalf("unexpected retries: extract=%d merge=%d", lane.Extract.Retries, lane.Merge.Retries)
+	}
 	if lane.Extract.Options["temperature"] != 0 {
 		t.Fatalf("expected object options, got %#v", lane.Extract.Options)
 	}
@@ -144,9 +189,88 @@ pipelines:
 	}
 }
 
+func TestParseFileConfigReferenceMaps(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    references:
+      " roster ": " ./shared-roster.yml "
+    artifacts:
+      events:
+        extract: fake/extract
+        references:
+          " lore ": " ./lore.md "
+`)
+
+	profile := cfg.Pipelines["example"]
+	if !reflect.DeepEqual(profile.References, map[string]string{"roster": "./shared-roster.yml"}) {
+		t.Fatalf("pipeline references = %#v, want trimmed map", profile.References)
+	}
+	gotLaneRefs := profile.Artifacts["events"].References
+	if !reflect.DeepEqual(gotLaneRefs, map[string]string{"lore": "./lore.md"}) {
+		t.Fatalf("lane references = %#v, want trimmed map", gotLaneRefs)
+	}
+}
+
+func TestParseFileConfigStageLocalReferenceMaps(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    chunk:
+      module: generic
+      references:
+        " scene_guide ": " ./scenes.md "
+    artifacts:
+      events:
+        extract:
+          module: fake/extract
+          references:
+            " glossary ": " ./glossary.md "
+            " roster ": " ./extract-roster.yml "
+        references:
+          roster: ./legacy-roster.yml
+          lore: ./lore.md
+        merge:
+          module: appendorder
+          references:
+            " merge_notes ": " ./merge.md "
+        normalize:
+          module: noop
+          references:
+            " normalization_notes ": " ./normalization.md "
+`)
+
+	profile := cfg.Pipelines["example"]
+	if !reflect.DeepEqual(profile.Chunk.References, map[string]string{"scene_guide": "./scenes.md"}) {
+		t.Fatalf("chunk references = %#v, want trimmed map", profile.Chunk.References)
+	}
+	lane := profile.Artifacts["events"]
+	if !reflect.DeepEqual(lane.References, map[string]string{"lore": "./lore.md", "roster": "./legacy-roster.yml"}) {
+		t.Fatalf("lane references = %#v, want trimmed map", lane.References)
+	}
+	wantExtract := map[string]string{
+		"glossary": "./glossary.md",
+		"lore":     "./lore.md",
+		"roster":   "./extract-roster.yml",
+	}
+	if !reflect.DeepEqual(lane.Extract.References, wantExtract) {
+		t.Fatalf("extract references = %#v, want legacy merged with extract override %#v", lane.Extract.References, wantExtract)
+	}
+	if !reflect.DeepEqual(lane.Merge.References, map[string]string{"merge_notes": "./merge.md"}) {
+		t.Fatalf("merge references = %#v, want trimmed map", lane.Merge.References)
+	}
+	if !reflect.DeepEqual(lane.Normalize.References, map[string]string{"normalization_notes": "./normalization.md"}) {
+		t.Fatalf("normalize references = %#v, want trimmed map", lane.Normalize.References)
+	}
+}
+
 func TestParseFileConfigValidatorMixedBindingForms(t *testing.T) {
 	cfg := parseAndApplyConfig(t, `
-version: 1
+version: 2
 pipelines:
   example:
     input: fake/input
@@ -176,87 +300,64 @@ pipelines:
 	}
 }
 
-func TestParseFileConfigDurationParsing(t *testing.T) {
-	tests := []struct {
-		name string
-		raw  string
-		want int
-	}{
-		{name: "integer seconds", raw: "600", want: 600},
-		{name: "duration string", raw: "10m", want: 600},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			cfg := parseAndApplyConfig(t, `
-version: 1
-llm_profiles:
-  default:
-    timeout: `+tc.raw+`
+func TestParseFileConfigStageLocalValidatorOverrides(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    chunk:
+      module: generic
+      validators: []
+    artifacts:
+      events:
+        extract:
+          module: fake/extract
+          validators:
+            - fake/validator
+            - module: fake/llm-validator
+              llm_profile: careful
+              options:
+                threshold: 0.7
+        merge:
+          module: appendorder
+          validators: []
+        normalize:
+          module: noop
 `)
-			if got := cfg.LLMProfiles["default"].TimeoutSeconds; got != tc.want {
-				t.Fatalf("TimeoutSeconds = %d, want %d", got, tc.want)
-			}
-		})
-	}
-}
 
-func TestParseFileConfigRejectsSubsecondDuration(t *testing.T) {
-	_, err := ParseFileConfigYAML([]byte(`
-version: 1
-llm_profiles:
-  default:
-    timeout: 1500ms
-`))
-	if err == nil || !strings.Contains(err.Error(), "whole seconds") {
-		t.Fatalf("expected whole-seconds duration error, got %v", err)
+	profile := cfg.Pipelines["example"]
+	if !profile.Chunk.Validators.Set || len(profile.Chunk.Validators.Validators) != 0 {
+		t.Fatalf("chunk validator override = %#v, want explicit empty", profile.Chunk.Validators)
 	}
-}
-
-func TestApplyFileConfigResolvesAPIKeyEnv(t *testing.T) {
-	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
-llm_profiles:
-  default:
-    api_key_env: NOTARIUS_TEST_API_KEY
-`))
-	if err != nil {
-		t.Fatalf("ParseFileConfigYAML: %v", err)
+	lane := profile.Artifacts["events"]
+	if !lane.Extract.Validators.Set {
+		t.Fatalf("extract validator override Set = false, want true")
 	}
-
-	cfg := Default()
-	if err := cfg.applyFileConfigWithLookup(fileCfg, mapLookup(map[string]string{"NOTARIUS_TEST_API_KEY": "secret"})); err != nil {
-		t.Fatalf("ApplyFileConfig: %v", err)
+	validators := lane.Extract.Validators.Validators
+	if len(validators) != 2 {
+		t.Fatalf("extract validators = %#v, want two validators", validators)
 	}
-	profile := cfg.LLMProfiles["default"]
-	if profile.APIKeyEnv != "NOTARIUS_TEST_API_KEY" || profile.APIKey != "secret" {
-		t.Fatalf("unexpected resolved API key: %+v", profile)
+	if validators[0].Module != "fake/validator" {
+		t.Fatalf("first validator = %#v, want fake/validator", validators[0])
 	}
-}
-
-func TestApplyFileConfigRejectsDuplicateTrimmedLLMProfileIDs(t *testing.T) {
-	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
-llm_profiles:
-  default:
-    model: first
-  " default ":
-    model: second
-`))
-	if err != nil {
-		t.Fatalf("ParseFileConfigYAML: %v", err)
+	if validators[1].Module != "fake/llm-validator" || validators[1].LLMProfile != "careful" {
+		t.Fatalf("second validator = %#v, want LLM validator with profile", validators[1])
 	}
-
-	cfg := Default()
-	err = cfg.applyFileConfigWithLookup(fileCfg, emptyLookup)
-	if err == nil || !strings.Contains(err.Error(), "llm profile id") || !strings.Contains(err.Error(), "duplicated") {
-		t.Fatalf("expected duplicate LLM profile ID error, got %v", err)
+	if validators[1].Options["threshold"] != 0.7 {
+		t.Fatalf("second validator options = %#v, want threshold", validators[1].Options)
+	}
+	if !lane.Merge.Validators.Set || len(lane.Merge.Validators.Validators) != 0 {
+		t.Fatalf("merge validator override = %#v, want explicit empty", lane.Merge.Validators)
+	}
+	if lane.Normalize.Validators.Set {
+		t.Fatalf("normalize validator override Set = true, want omitted")
 	}
 }
 
 func TestApplyFileConfigRejectsDuplicateTrimmedPipelineIDs(t *testing.T) {
 	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
+version: 2
 pipelines:
   example:
     input: fake/input
@@ -276,7 +377,7 @@ pipelines:
 
 func TestApplyFileConfigRejectsDuplicateTrimmedArtifactLaneIDs(t *testing.T) {
 	fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
+version: 2
 pipelines:
   example:
     input: fake/input
@@ -297,49 +398,134 @@ pipelines:
 	}
 }
 
-func TestApplyFileConfigAllowsRetryOnlyLLMProfile(t *testing.T) {
-	cfg := parseAndApplyConfig(t, `
-version: 1
-llm_profiles:
-  retry-only:
-    max_retries: 3
-`)
-
-	profile := cfg.LLMProfiles["retry-only"]
-	if profile.MaxRetries != 3 {
-		t.Fatalf("unexpected max retries: %d", profile.MaxRetries)
-	}
-	if profile.TimeoutSeconds != 0 {
-		t.Fatalf("expected unset timeout, got %d", profile.TimeoutSeconds)
-	}
-	if profile.MaxConcurrency != 0 {
-		t.Fatalf("expected unset max concurrency, got %d", profile.MaxConcurrency)
-	}
-}
-
-func TestApplyFileConfigRejectsInvalidAPIKeyEnv(t *testing.T) {
+func TestApplyFileConfigRejectsDuplicateTrimmedReferenceSlots(t *testing.T) {
 	tests := []struct {
 		name string
-		env  string
+		raw  string
 		want string
 	}{
-		{name: "invalid name", env: "NOTARIUS-KEY", want: "environment variable name"},
-		{name: "not set", env: "NOTARIUS_TEST_API_KEY", want: "is not set"},
+		{
+			name: "pipeline",
+			raw: `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    references:
+      roster: ./first.yml
+      " roster ": ./second.yml
+`,
+			want: `pipeline "example" reference slot`,
+		},
+		{
+			name: "lane",
+			raw: `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    artifacts:
+      events:
+        extract: fake/extract
+        references:
+          roster: ./first.yml
+          " roster ": ./second.yml
+`,
+			want: `pipeline "example" lane "events" reference slot`,
+		},
+		{
+			name: "chunk",
+			raw: `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    chunk:
+      module: generic
+      references:
+        roster: ./first.yml
+        " roster ": ./second.yml
+`,
+			want: `pipeline "example" chunk reference slot`,
+		},
+		{
+			name: "extract",
+			raw: `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    artifacts:
+      events:
+        extract:
+          module: fake/extract
+          references:
+            roster: ./first.yml
+            " roster ": ./second.yml
+`,
+			want: `pipeline "example" lane "events" extract reference slot`,
+		},
+		{
+			name: "normalize",
+			raw: `
+version: 2
+pipelines:
+  example:
+    input: fake/input
+    artifacts:
+      events:
+        extract: fake/extract
+        normalize:
+          module: noop
+          references:
+            roster: ./first.yml
+            " roster ": ./second.yml
+`,
+			want: `pipeline "example" lane "events" normalize reference slot`,
+		},
 	}
 
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
-			fileCfg, err := ParseFileConfigYAML([]byte(`
-version: 1
-llm_profiles:
-  default:
-    api_key_env: ` + tc.env + `
-`))
+			fileCfg, err := ParseFileConfigYAML([]byte(tc.raw))
 			if err != nil {
 				t.Fatalf("ParseFileConfigYAML: %v", err)
 			}
 			cfg := Default()
 			err = cfg.applyFileConfigWithLookup(fileCfg, emptyLookup)
+			if err == nil || !strings.Contains(err.Error(), tc.want) || !strings.Contains(err.Error(), "duplicated") {
+				t.Fatalf("expected duplicate reference slot error, got %v", err)
+			}
+		})
+	}
+}
+
+func TestApplyFileConfigRejectsInvalidScriptoriumSources(t *testing.T) {
+	tests := []struct {
+		name string
+		raw  string
+		want string
+	}{
+		{name: "empty profile dir", raw: "profile_dir: ' '", want: "profile_dir"},
+		{name: "empty profile file", raw: "profile_file: ' '", want: "profile_file"},
+		{name: "both sources", raw: "profile_dir: ./profiles\n  profile_file: ./profiles.yml", want: "mutually exclusive"},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			cfg := Default()
+			fileCfg, err := ParseFileConfigYAML([]byte(`
+version: 2
+scriptorium:
+  ` + tc.raw + `
+`))
+			if err != nil {
+				t.Fatalf("ParseFileConfigYAML: %v", err)
+			}
+			err = cfg.applyFileConfigWithLookup(fileCfg, emptyLookup)
+			if err == nil {
+				err = cfg.Validate()
+			}
 			if err == nil || !strings.Contains(err.Error(), tc.want) {
 				t.Fatalf("expected error containing %q, got %v", tc.want, err)
 			}
@@ -349,7 +535,7 @@ llm_profiles:
 
 func TestApplyFileConfigOperationalSections(t *testing.T) {
 	cfg := parseAndApplyConfig(t, `
-version: 1
+version: 2
 concurrency:
   total_llm: 4
 diagnostics:
@@ -360,6 +546,9 @@ diagnostics:
 	if cfg.Concurrency.TotalLLM != 4 {
 		t.Fatalf("unexpected total concurrency: %d", cfg.Concurrency.TotalLLM)
 	}
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 4 {
+		t.Fatalf("default extract workers = %d, want total concurrency", got)
+	}
 	if cfg.Diagnostics.WorkDir != "/tmp/notarius-test" {
 		t.Fatalf("unexpected work dir: %q", cfg.Diagnostics.WorkDir)
 	}
@@ -368,6 +557,147 @@ diagnostics:
 	}
 }
 
+func TestApplyFileConfigStageWorkers(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+concurrency:
+  total_llm: 4
+  stage_workers:
+    extract: 3
+`)
+
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 3 {
+		t.Fatalf("extract workers = %d, want 3", got)
+	}
+	if err := cfg.Validate(); err != nil {
+		t.Fatalf("Validate() error = %v, want nil", err)
+	}
+}
+
+func TestApplyFileConfigEmptyStageWorkersDefaultsExtractToTotal(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+concurrency:
+  total_llm: 4
+  stage_workers: {}
+`)
+	if got := cfg.Concurrency.StageWorkers["extract"]; got != 4 {
+		t.Fatalf("extract workers = %d, want total concurrency 4", got)
+	}
+}
+
+func TestApplyFileConfigRejectsUnsupportedStageWorkerKeys(t *testing.T) {
+	for _, test := range []struct {
+		name string
+		key  string
+		want string
+	}{
+		{name: "empty", key: "' '", want: "must not be empty"},
+		{name: "unknown", key: "merge", want: "not supported"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			fileCfg, err := ParseFileConfigYAML([]byte("version: 2\nconcurrency:\n  stage_workers:\n    " + test.key + ": 1\n"))
+			if err != nil {
+				t.Fatalf("ParseFileConfigYAML() error = %v", err)
+			}
+			cfg := Default()
+			err = cfg.applyFileConfigWithLookup(fileCfg, emptyLookup)
+			if err == nil || !strings.Contains(err.Error(), test.want) {
+				t.Fatalf("ApplyFileConfig() error = %v, want %q", err, test.want)
+			}
+		})
+	}
+}
+
+func TestApplyFileConfigWorkspaceSection(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+workspace:
+  directory: /var/lib/notarius
+  diagnostics:
+    enabled: false
+    retention: never
+  resume:
+    enabled: true
+  debug:
+    enabled: true
+diagnostics:
+  work_dir: /tmp/legacy
+  retention: always
+`)
+
+	if cfg.Workspace.Directory != "/var/lib/notarius" {
+		t.Fatalf("workspace directory = %q, want /var/lib/notarius", cfg.Workspace.Directory)
+	}
+	if cfg.DiagnosticsEnabled() {
+		t.Fatalf("expected diagnostics disabled")
+	}
+	if cfg.Diagnostics.WorkDir != "/var/lib/notarius/diagnostics" {
+		t.Fatalf("effective diagnostics work dir = %q, want workspace diagnostics root", cfg.Diagnostics.WorkDir)
+	}
+	if cfg.Diagnostics.Retention != diagnostics.RetentionNever {
+		t.Fatalf("effective diagnostics retention = %q, want workspace override", cfg.Diagnostics.Retention)
+	}
+	if !cfg.Workspace.Resume.Enabled {
+		t.Fatalf("expected resume enabled")
+	}
+	if !cfg.Workspace.Debug.Enabled {
+		t.Fatalf("expected debug enabled")
+	}
+}
+
+func TestApplyFileConfigLegacyDiagnosticsRemainCompatible(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 2
+diagnostics:
+  work_dir: /tmp/legacy
+  retention: always
+`)
+
+	if cfg.Workspace.Directory != "" {
+		t.Fatalf("workspace directory = %q, want unset", cfg.Workspace.Directory)
+	}
+	if !cfg.DiagnosticsEnabled() {
+		t.Fatalf("expected diagnostics enabled")
+	}
+	if cfg.Diagnostics.WorkDir != "/tmp/legacy" {
+		t.Fatalf("effective diagnostics work dir = %q, want legacy", cfg.Diagnostics.WorkDir)
+	}
+	if cfg.Diagnostics.Retention != diagnostics.RetentionAlways {
+		t.Fatalf("effective diagnostics retention = %q, want legacy", cfg.Diagnostics.Retention)
+	}
+}
+
+func TestApplyFileConfigWorkspaceRetentionOverridesLegacyRetentionOnlyWhenSet(t *testing.T) {
+	t.Run("legacy retained", func(t *testing.T) {
+		cfg := parseAndApplyConfig(t, `
+version: 2
+workspace:
+  directory: /var/lib/notarius
+diagnostics:
+  retention: never
+`)
+		if cfg.Diagnostics.Retention != diagnostics.RetentionNever {
+			t.Fatalf("effective diagnostics retention = %q, want legacy", cfg.Diagnostics.Retention)
+		}
+	})
+
+	t.Run("workspace overrides", func(t *testing.T) {
+		cfg := parseAndApplyConfig(t, `
+version: 2
+workspace:
+  directory: /var/lib/notarius
+  diagnostics:
+    retention: always
+diagnostics:
+  retention: never
+`)
+		if cfg.Diagnostics.Retention != diagnostics.RetentionAlways {
+			t.Fatalf("effective diagnostics retention = %q, want workspace", cfg.Diagnostics.Retention)
+		}
+	})
+}
+
 func parseAndApplyConfig(t *testing.T, raw string) Config {
 	t.Helper()
 	fileCfg, err := ParseFileConfigYAML([]byte(raw))

internal/core/config/redaction.go

@@ -2,17 +2,8 @@ package config
 
 import "gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 
-const redactedSecret = "[REDACTED]"
-
 func (c Config) Redacted() Config {
-	redacted := cloneConfig(c)
-	for id, profile := range redacted.LLMProfiles {
-		if profile.APIKey != "" {
-			profile.APIKey = redactedSecret
-		}
-		redacted.LLMProfiles[id] = profile
-	}
-	return redacted
+	return cloneConfig(c)
 }
 
 func (c Config) RedactedDiagnosticsPayload() any {
@@ -21,10 +12,12 @@ func (c Config) RedactedDiagnosticsPayload() any {
 
 func (e EffectiveConfig) RedactedDiagnosticsPayload() any {
 	return EffectiveConfig{
-		Config:           e.Config.Redacted(),
-		PipelineID:       e.PipelineID,
-		Only:             append([]string(nil), e.Only...),
-		ResolvedPipeline: cloneResolvedPipeline(e.ResolvedPipeline),
+		Config:             e.Config.Redacted(),
+		PipelineID:         e.PipelineID,
+		Only:               append([]string(nil), e.Only...),
+		ReferenceOverrides: append([]pipeline.ReferenceBinding(nil), e.ReferenceOverrides...),
+		ReferenceUnbinds:   append([]pipeline.ReferenceUnbind(nil), e.ReferenceUnbinds...),
+		ResolvedPipeline:   cloneResolvedPipeline(e.ResolvedPipeline),
 	}
 }
 
@@ -32,7 +25,14 @@ func cloneResolvedPipeline(in pipeline.ResolvedPipeline) pipeline.ResolvedPipeli
 	out := in
 	out.Input = cloneModuleBinding(in.Input)
 	out.Chunk = cloneModuleBinding(in.Chunk)
+	out.ChunkReferences = pipeline.CloneReferenceTarget(in.ChunkReferences)
 	out.Output = cloneModuleBinding(in.Output)
+	if len(in.ValidatorChains) > 0 {
+		out.ValidatorChains = make([]pipeline.ResolvedValidatorChain, len(in.ValidatorChains))
+		for i, chain := range in.ValidatorChains {
+			out.ValidatorChains[i] = cloneResolvedValidatorChain(chain)
+		}
+	}
 	if len(in.ArtifactLanes) > 0 {
 		out.ArtifactLanes = make([]pipeline.ResolvedArtifactLane, len(in.ArtifactLanes))
 		for i, lane := range in.ArtifactLanes {
@@ -42,11 +42,30 @@ func cloneResolvedPipeline(in pipeline.ResolvedPipeline) pipeline.ResolvedPipeli
 	return out
 }
 
+func cloneResolvedValidatorChain(in pipeline.ResolvedValidatorChain) pipeline.ResolvedValidatorChain {
+	out := in
+	if len(in.Validators) > 0 {
+		out.Validators = make([]pipeline.ResolvedValidator, len(in.Validators))
+		for i, validator := range in.Validators {
+			out.Validators[i] = pipeline.ResolvedValidator{
+				Binding:        cloneModuleBinding(validator.Binding),
+				ExecutionClass: validator.ExecutionClass,
+				Target:         validator.Target,
+				ArtifactKind:   validator.ArtifactKind,
+			}
+		}
+	}
+	return out
+}
+
 func cloneResolvedArtifactLane(in pipeline.ResolvedArtifactLane) pipeline.ResolvedArtifactLane {
 	out := in
 	out.Extract = cloneModuleBinding(in.Extract)
 	out.Merge = cloneModuleBinding(in.Merge)
 	out.Normalize = cloneModuleBinding(in.Normalize)
+	out.ExtractReferences = pipeline.CloneReferenceTarget(in.ExtractReferences)
+	out.MergeReferences = pipeline.CloneReferenceTarget(in.MergeReferences)
+	out.NormalizeReferences = pipeline.CloneReferenceTarget(in.NormalizeReferences)
 	if len(in.Validators) > 0 {
 		out.Validators = make([]pipeline.ModuleBinding, len(in.Validators))
 		for i, binding := range in.Validators {

internal/core/config/redaction_test.go

@@ -3,74 +3,99 @@ package config
 import (
 	"testing"
 
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
-func TestRedactedConfigRemovesAPIKeyValues(t *testing.T) {
+func TestRedactedConfigCopiesScriptoriumConfig(t *testing.T) {
 	cfg := Default()
-	cfg.LLMProfiles[pipeline.DefaultLLMProfile] = LLMProfile{
-		Provider:       "openai-compatible",
-		BaseURL:        "https://example.invalid/v1",
-		Model:          "test-model",
-		APIKey:         "secret",
-		APIKeyEnv:      "NOTARIUS_TEST_API_KEY",
-		TimeoutSeconds: 600,
-		MaxRetries:     3,
-		MaxConcurrency: 1,
-	}
-	cfg.LLMProfiles["other"] = LLMProfile{APIKey: "other-secret", Model: "other-model"}
+	cfg.Scriptorium.ProfileDir = "./profiles"
+	cfg.Workspace.Directory = "/var/lib/notarius"
+	cfg.Workspace.Resume.Enabled = true
+	cfg.Concurrency.StageWorkers["extract"] = 1
 
 	redacted := cfg.Redacted()
 
-	if redacted.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != redactedSecret {
-		t.Fatalf("expected default API key redacted, got %+v", redacted.LLMProfiles[pipeline.DefaultLLMProfile])
+	if redacted.Scriptorium.ProfileDir != "./profiles" {
+		t.Fatalf("expected Scriptorium profile source preserved, got %+v", redacted.Scriptorium)
 	}
-	if redacted.LLMProfiles["other"].APIKey != redactedSecret {
-		t.Fatalf("expected other API key redacted, got %+v", redacted.LLMProfiles["other"])
-	}
-	if redacted.LLMProfiles[pipeline.DefaultLLMProfile].Model != "test-model" {
-		t.Fatalf("expected non-secret fields preserved, got %+v", redacted.LLMProfiles[pipeline.DefaultLLMProfile])
-	}
-	if cfg.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != "secret" {
+	redacted.Scriptorium.ProfileDir = "./changed"
+	if cfg.Scriptorium.ProfileDir != "./profiles" {
 		t.Fatalf("redaction mutated original config")
 	}
+	if redacted.Workspace.Directory != "/var/lib/notarius" || !redacted.Workspace.Resume.Enabled {
+		t.Fatalf("expected workspace config preserved, got %+v", redacted.Workspace)
+	}
+	redacted.Workspace.Directory = "/changed"
+	if cfg.Workspace.Directory != "/var/lib/notarius" {
+		t.Fatalf("redaction mutated original workspace config")
+	}
+	redacted.Concurrency.StageWorkers["extract"] = 9
+	if cfg.Concurrency.StageWorkers["extract"] != 1 {
+		t.Fatalf("redaction aliased stage worker map")
+	}
 }
 
-func TestConfigRedactedDiagnosticsPayloadRedactsAPIKeys(t *testing.T) {
+func TestConfigRedactedDiagnosticsPayloadCopiesConfig(t *testing.T) {
 	cfg := Default()
-	profile := cfg.LLMProfiles[pipeline.DefaultLLMProfile]
-	profile.APIKey = "secret"
-	profile.Model = "test-model"
-	cfg.LLMProfiles[pipeline.DefaultLLMProfile] = profile
+	cfg.Scriptorium.ProfileFile = "./profiles.yml"
 
 	payload, ok := cfg.RedactedDiagnosticsPayload().(Config)
 	if !ok {
 		t.Fatalf("expected Config payload, got %T", cfg.RedactedDiagnosticsPayload())
 	}
-	if payload.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != redactedSecret {
-		t.Fatalf("expected API key redacted, got %+v", payload.LLMProfiles[pipeline.DefaultLLMProfile])
-	}
-	if payload.LLMProfiles[pipeline.DefaultLLMProfile].Model != "test-model" {
-		t.Fatalf("expected non-secret fields preserved, got %+v", payload.LLMProfiles[pipeline.DefaultLLMProfile])
-	}
-	if cfg.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != "secret" {
-		t.Fatalf("redacted diagnostics payload mutated original config")
+	if payload.Scriptorium.ProfileFile != "./profiles.yml" {
+		t.Fatalf("expected Scriptorium profile file preserved, got %+v", payload.Scriptorium)
 	}
 }
 
-func TestEffectiveConfigRedactedDiagnosticsPayloadRedactsAndCopies(t *testing.T) {
+func TestEffectiveConfigRedactedDiagnosticsPayloadCopies(t *testing.T) {
 	cfg := validConfig()
-	profile := cfg.LLMProfiles[pipeline.DefaultLLMProfile]
-	profile.APIKey = "secret"
-	cfg.LLMProfiles[pipeline.DefaultLLMProfile] = profile
+	cfg.Concurrency.TotalLLM = 4
+	cfg.Concurrency.StageWorkers["extract"] = 2
 	lane := cfg.Pipelines["example"].Artifacts["events"]
 	lane.Extract.Options = map[string]any{"temperature": 0.2}
+	lane.References = map[string]string{"roster": "./roster.yml"}
+	lane.Extract.References = map[string]string{"glossary": "./glossary.md"}
+	lane.Normalize.References = map[string]string{"notes": "./normalize.md"}
 	cfg.Pipelines["example"].Artifacts["events"] = lane
+	pipelineProfile := cfg.Pipelines["example"]
+	pipelineProfile.Chunk.References = map[string]string{"scene_guide": "./scene.md"}
+	cfg.Pipelines["example"] = pipelineProfile
 
 	effective, err := cfg.Resolve(ResolveInput{
 		PipelineID: "example",
 		Only:       []string{"events"},
-		Catalog:    fakeCatalog(t),
+		Catalog: fakeCatalog(t,
+			pipeline.ModuleSpec{
+				Key:      "generic",
+				Stage:    pipeline.StageChunk,
+				Requires: []string{"source"},
+				Provides: []string{"chunks"},
+				ReferenceSlots: []contracts.ReferenceSlot{
+					{Name: "scene_guide"},
+				},
+			},
+			pipeline.ModuleSpec{
+				Key:      "fake/extract",
+				Stage:    pipeline.StageExtract,
+				Requires: []string{"chunks"},
+				Provides: []string{"artifact"},
+				ReferenceSlots: []contracts.ReferenceSlot{
+					{Name: "glossary"},
+					{Name: "roster"},
+				},
+			},
+			pipeline.ModuleSpec{
+				Key:      "noop",
+				Stage:    pipeline.StageNormalize,
+				Requires: []string{"merged"},
+				Provides: []string{"normalized"},
+				ReferenceSlots: []contracts.ReferenceSlot{
+					{Name: "notes"},
+				},
+			},
+		),
 	})
 	if err != nil {
 		t.Fatalf("Resolve: %v", err)
@@ -80,15 +105,13 @@ func TestEffectiveConfigRedactedDiagnosticsPayloadRedactsAndCopies(t *testing.T)
 	if !ok {
 		t.Fatalf("expected EffectiveConfig payload, got %T", effective.RedactedDiagnosticsPayload())
 	}
-	if payload.Config.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != redactedSecret {
-		t.Fatalf("expected nested API key redacted, got %+v", payload.Config.LLMProfiles[pipeline.DefaultLLMProfile])
-	}
-	if cfg.LLMProfiles[pipeline.DefaultLLMProfile].APIKey != "secret" {
-		t.Fatalf("redacted diagnostics payload mutated source config")
-	}
 	if payload.PipelineID != effective.PipelineID || payload.ResolvedPipeline.Digest != effective.ResolvedPipeline.Digest {
 		t.Fatalf("expected pipeline metadata preserved, got %+v", payload)
 	}
+	payload.Config.Concurrency.StageWorkers["extract"] = 4
+	if effective.Config.Concurrency.StageWorkers["extract"] != 2 {
+		t.Fatalf("expected effective stage worker map to be copied")
+	}
 
 	payload.Only[0] = "changed"
 	if effective.Only[0] != "events" {
@@ -98,4 +121,52 @@ func TestEffectiveConfigRedactedDiagnosticsPayloadRedactsAndCopies(t *testing.T)
 	if effective.ResolvedPipeline.ArtifactLanes[0].Extract.Options["temperature"] != 0.2 {
 		t.Fatalf("expected resolved pipeline options to be copied")
 	}
+	payload.ResolvedPipeline.ArtifactLanes[0].ExtractReferences.Bindings[0].Source = "./changed.yml"
+	if referenceBindingSource(effective.ResolvedPipeline.ArtifactLanes[0].ExtractReferences.Bindings, "roster") != "./roster.yml" {
+		t.Fatalf("expected resolved pipeline references to be copied")
+	}
+	payload.ResolvedPipeline.Chunk.References["scene_guide"] = "./changed-scene.md"
+	if effective.ResolvedPipeline.Chunk.References["scene_guide"] != "./scene.md" {
+		t.Fatalf("expected chunk references to be copied")
+	}
+	payload.ResolvedPipeline.ArtifactLanes[0].Extract.References["glossary"] = "./changed-glossary.md"
+	if effective.ResolvedPipeline.ArtifactLanes[0].Extract.References["glossary"] != "./glossary.md" {
+		t.Fatalf("expected extract references to be copied")
+	}
+	payload.ResolvedPipeline.ArtifactLanes[0].Normalize.References["notes"] = "./changed-normalize.md"
+	if effective.ResolvedPipeline.ArtifactLanes[0].Normalize.References["notes"] != "./normalize.md" {
+		t.Fatalf("expected normalize references to be copied")
+	}
+
+	effective.ResolvedPipeline.ArtifactLanes[0].ExtractReferences.ReferenceSet = contracts.ReferenceSet{
+		Slots: map[string]contracts.ResolvedReferenceSlot{
+			"roster": {
+				Slot: contracts.ReferenceSlot{Name: "roster"},
+				Items: []contracts.ReferenceItem{
+					{
+						SlotName: "roster",
+						Content:  []byte("reference content"),
+					},
+				},
+			},
+		},
+	}
+	payload, ok = effective.RedactedDiagnosticsPayload().(EffectiveConfig)
+	if !ok {
+		t.Fatalf("expected EffectiveConfig payload, got %T", effective.RedactedDiagnosticsPayload())
+	}
+	payload.ResolvedPipeline.ArtifactLanes[0].ExtractReferences.ReferenceSet.Slots["roster"].Items[0].Content[0] = 'X'
+	got := effective.ResolvedPipeline.ArtifactLanes[0].ExtractReferences.ReferenceSet.Slots["roster"].Items[0].Content
+	if string(got) != "reference content" {
+		t.Fatalf("expected materialized reference content to be copied, got %q", got)
+	}
+}
+
+func referenceBindingSource(bindings []pipeline.ReferenceBinding, slotName string) string {
+	for _, binding := range bindings {
+		if binding.SlotName == slotName {
+			return binding.Source
+		}
+	}
+	return ""
 }

internal/core/config/validation.go

@@ -2,16 +2,19 @@ package config
 
 import (
 	"fmt"
+	"sort"
 	"strings"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/diagnostics"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 )
 
-const providerOpenAICompatible = "openai-compatible"
-
 func (c Config) Validate() error {
-	if err := validateLLMProfiles(c.LLMProfiles); err != nil {
+	c.Concurrency.recomputeStageWorkerDefaults()
+	if err := validateScriptorium(c.Scriptorium); err != nil {
+		return err
+	}
+	if err := validateWorkspace(c.Workspace); err != nil {
 		return err
 	}
 	if err := validateDiagnostics(c.Diagnostics); err != nil {
@@ -20,43 +23,49 @@ func (c Config) Validate() error {
 	if c.Concurrency.TotalLLM <= 0 {
 		return fmt.Errorf("total LLM concurrency must be greater than zero")
 	}
-	return validatePipelineProfiles(c.Pipelines, c.LLMProfiles)
+	if err := validateStageWorkers(c.Concurrency); err != nil {
+		return err
+	}
+	return validatePipelineProfiles(c.Pipelines)
 }
 
-func (c Config) LLMProfile(id string) (LLMProfile, bool) {
-	trimmedID := strings.TrimSpace(id)
-	for rawID, profile := range c.LLMProfiles {
-		if strings.TrimSpace(rawID) == trimmedID {
-			return profile, true
+func validateStageWorkers(cfg ConcurrencyConfig) error {
+	keys := make([]string, 0, len(cfg.StageWorkers))
+	for key := range cfg.StageWorkers {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	for _, key := range keys {
+		if strings.TrimSpace(key) == "" {
+			return fmt.Errorf("concurrency.stage_workers key must not be empty")
+		}
+		if key != "extract" {
+			return fmt.Errorf("concurrency.stage_workers key %q is not supported", key)
 		}
 	}
-	return LLMProfile{}, false
+	extractWorkers, ok := cfg.StageWorkers["extract"]
+	if !ok {
+		extractWorkers = cfg.TotalLLM
+	}
+	if extractWorkers < 1 || extractWorkers > cfg.TotalLLM {
+		return fmt.Errorf("concurrency.stage_workers.extract must be between 1 and concurrency.total_llm (%d)", cfg.TotalLLM)
+	}
+	return nil
 }
 
-func validateLLMProfiles(profiles map[string]LLMProfile) error {
-	seen := make(map[string]struct{}, len(profiles))
-	for rawID, profile := range profiles {
-		id := strings.TrimSpace(rawID)
-		if id == "" {
-			return fmt.Errorf("LLM profile id must not be empty")
-		}
-		if _, ok := seen[id]; ok {
-			return fmt.Errorf("LLM profile id %q is duplicated after trimming", id)
-		}
-		seen[id] = struct{}{}
+func validateScriptorium(cfg ScriptoriumConfig) error {
+	if strings.TrimSpace(cfg.ProfileDir) != "" && strings.TrimSpace(cfg.ProfileFile) != "" {
+		return fmt.Errorf("scriptorium profile_dir and profile_file are mutually exclusive")
+	}
+	return nil
+}
 
-		provider := strings.TrimSpace(profile.Provider)
-		if provider != "" && provider != providerOpenAICompatible {
-			return fmt.Errorf("LLM profile %q provider %q is not supported", id, provider)
-		}
-		if profile.TimeoutSeconds < 0 {
-			return fmt.Errorf("LLM profile %q timeout seconds must not be negative", id)
-		}
-		if profile.MaxRetries < 0 {
-			return fmt.Errorf("LLM profile %q max retries must not be negative", id)
-		}
-		if profile.MaxConcurrency < 0 {
-			return fmt.Errorf("LLM profile %q max concurrency must not be negative", id)
+func validateWorkspace(cfg WorkspaceConfig) error {
+	if cfg.Diagnostics.retentionSet {
+		switch cfg.Diagnostics.Retention {
+		case "", diagnostics.RetentionAuto, diagnostics.RetentionAlways, diagnostics.RetentionNever:
+		default:
+			return fmt.Errorf("workspace diagnostics retention %q is not supported", cfg.Diagnostics.Retention)
 		}
 	}
 	return nil
@@ -74,7 +83,7 @@ func validateDiagnostics(cfg DiagnosticsConfig) error {
 	}
 }
 
-func validatePipelineProfiles(profiles map[string]pipeline.PipelineProfile, llmProfiles map[string]LLMProfile) error {
+func validatePipelineProfiles(profiles map[string]pipeline.PipelineProfile) error {
 	seen := make(map[string]struct{}, len(profiles))
 	for rawID, profile := range profiles {
 		id := strings.TrimSpace(rawID)
@@ -89,13 +98,16 @@ func validatePipelineProfiles(profiles map[string]pipeline.PipelineProfile, llmP
 		if profile.ID != "" && strings.TrimSpace(profile.ID) != id {
 			return fmt.Errorf("pipeline %q profile id %q does not match map key", id, profile.ID)
 		}
-		if err := validateBindingLLMProfile(id, "", "input", profile.Input, llmProfiles); err != nil {
+		if err := validateBinding(id, "", "input", profile.Input, false); err != nil {
 			return err
 		}
-		if err := validateBindingLLMProfile(id, "", "chunk", profile.Chunk, llmProfiles); err != nil {
+		if err := validateBinding(id, "", "chunk", profile.Chunk, true); err != nil {
 			return err
 		}
-		if err := validateBindingLLMProfile(id, "", "output", profile.Output, llmProfiles); err != nil {
+		if err := validateBinding(id, "", "output", profile.Output, false); err != nil {
+			return err
+		}
+		if err := validateReferenceMap(id, "", profile.References); err != nil {
 			return err
 		}
 		for rawLaneID, lane := range profile.Artifacts {
@@ -103,51 +115,133 @@ func validatePipelineProfiles(profiles map[string]pipeline.PipelineProfile, llmP
 			if laneID == "" {
 				return fmt.Errorf("pipeline %q artifact lane id must not be empty", id)
 			}
-			if err := validateBindingLLMProfile(id, laneID, "extract", lane.Extract, llmProfiles); err != nil {
+			if err := validateReferenceMap(id, laneID, lane.References); err != nil {
 				return err
 			}
-			if err := validateBindingLLMProfile(id, laneID, "merge", lane.Merge, llmProfiles); err != nil {
+			if err := validateBinding(id, laneID, "extract", lane.Extract, true); err != nil {
 				return err
 			}
-			if err := validateBindingLLMProfile(id, laneID, "normalize", lane.Normalize, llmProfiles); err != nil {
+			if err := validateBinding(id, laneID, "merge", lane.Merge, true); err != nil {
 				return err
 			}
-			for i, validator := range lane.Validators {
-				if err := validateBindingLLMProfile(id, laneID, fmt.Sprintf("validator[%d]", i), validator, llmProfiles); err != nil {
-					return err
-				}
+			if err := validateBinding(id, laneID, "normalize", lane.Normalize, true); err != nil {
+				return err
+			}
+			if len(lane.Validators) > 0 {
+				return fmt.Errorf("pipeline %q lane %q validators are not supported at artifact lane level; use extract.validators, merge.validators, or normalize.validators", id, laneID)
 			}
 		}
 	}
 	return nil
 }
 
+func validateBinding(
+	pipelineID string,
+	laneID string,
+	slot string,
+	binding pipeline.ModuleBinding,
+	referencesAllowed bool,
+) error {
+	if err := validateBindingLLMProfile(pipelineID, laneID, slot, binding); err != nil {
+		return err
+	}
+	if binding.Retries < 0 {
+		if laneID != "" {
+			return fmt.Errorf("pipeline %q lane %q %s retries must be greater than or equal to zero", pipelineID, laneID, slot)
+		}
+		return fmt.Errorf("pipeline %q %s retries must be greater than or equal to zero", pipelineID, slot)
+	}
+	if err := validateValidatorOverride(pipelineID, laneID, slot, binding.Validators); err != nil {
+		return err
+	}
+	if len(binding.References) == 0 {
+		return nil
+	}
+	if !referencesAllowed {
+		if laneID != "" {
+			return fmt.Errorf("pipeline %q lane %q %s references are not supported", pipelineID, laneID, slot)
+		}
+		return fmt.Errorf("pipeline %q %s references are not supported", pipelineID, slot)
+	}
+	return validateReferenceMapForContext(pipelineID, laneID, slot, binding.References)
+}
+
+func validateValidatorOverride(pipelineID string, laneID string, slot string, override pipeline.ValidatorOverride) error {
+	if !override.Set {
+		return nil
+	}
+	switch slot {
+	case "chunk", "extract", "merge", "normalize":
+	default:
+		return fmt.Errorf("%s validators are not supported", referenceContext(pipelineID, laneID, slot))
+	}
+	for i, validator := range override.Validators {
+		context := fmt.Sprintf("%s validators[%d]", referenceContext(pipelineID, laneID, slot), i)
+		if strings.TrimSpace(validator.Module) == "" {
+			return fmt.Errorf("%s module must not be empty", context)
+		}
+		if len(validator.References) > 0 {
+			return fmt.Errorf("%s references are not supported", context)
+		}
+		if validator.Validators.Set {
+			return fmt.Errorf("%s nested validators are not supported", context)
+		}
+		if validator.Retries != 0 {
+			return fmt.Errorf("%s retries are not supported", context)
+		}
+		if validator.LLMProfile != "" && strings.TrimSpace(validator.LLMProfile) == "" {
+			return fmt.Errorf("%s llm_profile must not be empty when set", context)
+		}
+	}
+	return nil
+}
+
+func validateReferenceMap(pipelineID string, laneID string, references map[string]string) error {
+	return validateReferenceMapForContext(pipelineID, laneID, "", references)
+}
+
+func validateReferenceMapForContext(pipelineID string, laneID string, slot string, references map[string]string) error {
+	seen := make(map[string]struct{}, len(references))
+	for rawSlotName, rawSource := range references {
+		slotName := strings.TrimSpace(rawSlotName)
+		if slotName == "" {
+			return fmt.Errorf("%s reference slot name must not be empty", referenceContext(pipelineID, laneID, slot))
+		}
+		if _, ok := seen[slotName]; ok {
+			return fmt.Errorf("%s reference slot %q is duplicated after trimming", referenceContext(pipelineID, laneID, slot), slotName)
+		}
+		seen[slotName] = struct{}{}
+		if strings.TrimSpace(rawSource) == "" {
+			return fmt.Errorf("%s reference slot %q source must not be empty", referenceContext(pipelineID, laneID, slot), slotName)
+		}
+	}
+	return nil
+}
+
+func referenceContext(pipelineID string, laneID string, slot string) string {
+	if laneID != "" && slot != "" {
+		return fmt.Sprintf("pipeline %q lane %q %s", pipelineID, laneID, slot)
+	}
+	if laneID != "" {
+		return fmt.Sprintf("pipeline %q lane %q", pipelineID, laneID)
+	}
+	if slot != "" {
+		return fmt.Sprintf("pipeline %q %s", pipelineID, slot)
+	}
+	return fmt.Sprintf("pipeline %q", pipelineID)
+}
+
 func validateBindingLLMProfile(
 	pipelineID string,
 	laneID string,
 	slot string,
 	binding pipeline.ModuleBinding,
-	profiles map[string]LLMProfile,
 ) error {
-	profileID := strings.TrimSpace(binding.LLMProfile)
-	if profileID == "" {
-		profileID = pipeline.DefaultLLMProfile
-	}
-	if hasLLMProfile(profiles, profileID) {
-		return nil
-	}
-	if laneID != "" {
-		return fmt.Errorf("pipeline %q lane %q %s references unknown LLM profile %q", pipelineID, laneID, slot, profileID)
-	}
-	return fmt.Errorf("pipeline %q %s references unknown LLM profile %q", pipelineID, slot, profileID)
-}
-
-func hasLLMProfile(profiles map[string]LLMProfile, profileID string) bool {
-	profileID = strings.TrimSpace(profileID)
-	for rawID := range profiles {
-		if strings.TrimSpace(rawID) == profileID {
-			return true
+	if binding.LLMProfile != "" && strings.TrimSpace(binding.LLMProfile) == "" {
+		if laneID != "" {
+			return fmt.Errorf("pipeline %q lane %q %s llm_profile must not be empty when set", pipelineID, laneID, slot)
 		}
+		return fmt.Errorf("pipeline %q %s llm_profile must not be empty when set", pipelineID, slot)
 	}
-	return false
+	return nil
 }

internal/core/config/validation_test.go

@@ -1,6 +1,7 @@
 package config
 
 import (
+	"fmt"
 	"strings"
 	"testing"
 
@@ -17,27 +18,26 @@ func TestValidateSuccessForValidConfig(t *testing.T) {
 	}
 }
 
-func TestValidateRejectsUnknownLLMProfileReferencedByBinding(t *testing.T) {
+func TestValidateAllowsExplicitScriptoriumProfileIDOnBinding(t *testing.T) {
 	cfg := validConfig()
 	lane := cfg.Pipelines["example"].Artifacts["events"]
-	lane.Extract.LLMProfile = "missing"
+	lane.Extract.LLMProfile = "scriptorium-profile"
 	cfg.Pipelines["example"].Artifacts["events"] = lane
 
-	err := cfg.Validate()
-	if err == nil || !strings.Contains(err.Error(), "unknown LLM profile") || !strings.Contains(err.Error(), "events") {
-		t.Fatalf("expected unknown LLM profile error with lane context, got %v", err)
+	if err := cfg.Validate(); err != nil {
+		t.Fatalf("Validate() error = %v, want nil", err)
 	}
 }
 
-func TestValidateRejectsInvalidProvider(t *testing.T) {
+func TestValidateRejectsWhitespaceOnlyExplicitLLMProfile(t *testing.T) {
 	cfg := validConfig()
-	profile := cfg.LLMProfiles["default"]
-	profile.Provider = "unsupported"
-	cfg.LLMProfiles["default"] = profile
+	lane := cfg.Pipelines["example"].Artifacts["events"]
+	lane.Extract.LLMProfile = " "
+	cfg.Pipelines["example"].Artifacts["events"] = lane
 
 	err := cfg.Validate()
-	if err == nil || !strings.Contains(err.Error(), "provider") {
-		t.Fatalf("expected provider error, got %v", err)
+	if err == nil || !strings.Contains(err.Error(), "llm_profile") || !strings.Contains(err.Error(), "events") {
+		t.Fatalf("expected llm_profile error with lane context, got %v", err)
 	}
 }
 
@@ -56,34 +56,16 @@ func TestValidateRejectsInvalidNumericFields(t *testing.T) {
 			want: "total LLM concurrency",
 		},
 		{
-			name: "timeout",
+			name: "negative retries",
 			mutate: func(cfg Config) Config {
-				profile := cfg.LLMProfiles["default"]
-				profile.TimeoutSeconds = -1
-				cfg.LLMProfiles["default"] = profile
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.Merge.Retries = -1
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
 				return cfg
 			},
-			want: "timeout",
-		},
-		{
-			name: "max retries",
-			mutate: func(cfg Config) Config {
-				profile := cfg.LLMProfiles["default"]
-				profile.MaxRetries = -1
-				cfg.LLMProfiles["default"] = profile
-				return cfg
-			},
-			want: "max retries",
-		},
-		{
-			name: "max concurrency",
-			mutate: func(cfg Config) Config {
-				profile := cfg.LLMProfiles["default"]
-				profile.MaxConcurrency = -1
-				cfg.LLMProfiles["default"] = profile
-				return cfg
-			},
-			want: "max concurrency",
+			want: "retries",
 		},
 	}
 
@@ -97,12 +79,49 @@ func TestValidateRejectsInvalidNumericFields(t *testing.T) {
 	}
 }
 
-func TestValidateAllowsPartialLLMProfileNumericConfig(t *testing.T) {
-	cfg := validConfig()
-	cfg.LLMProfiles["retry-only"] = LLMProfile{MaxRetries: 3}
+func TestValidateStageWorkerBoundaries(t *testing.T) {
+	for _, test := range []struct {
+		name    string
+		workers int
+		wantErr bool
+	}{
+		{name: "below minimum", workers: 0, wantErr: true},
+		{name: "minimum", workers: 1},
+		{name: "maximum", workers: 4},
+		{name: "above maximum", workers: 5, wantErr: true},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			cfg := validConfig()
+			cfg.Concurrency.TotalLLM = 4
+			cfg.Concurrency.StageWorkers["extract"] = test.workers
+			err := cfg.Validate()
+			if test.wantErr && (err == nil || !strings.Contains(err.Error(), "stage_workers.extract")) {
+				t.Fatalf("Validate() error = %v, want extract worker range error", err)
+			}
+			if !test.wantErr && err != nil {
+				t.Fatalf("Validate() error = %v, want nil", err)
+			}
+		})
+	}
+}
 
-	if err := cfg.Validate(); err != nil {
-		t.Fatalf("Validate: %v", err)
+func TestValidateRejectsUnknownEffectiveStageWorkerKey(t *testing.T) {
+	cfg := validConfig()
+	cfg.Concurrency.StageWorkers["merge"] = 1
+	err := cfg.Validate()
+	if err == nil || !strings.Contains(err.Error(), "stage_workers key") || !strings.Contains(err.Error(), "merge") {
+		t.Fatalf("Validate() error = %v, want unknown stage worker key", err)
+	}
+}
+
+func TestValidateRejectsMutuallyExclusiveScriptoriumProfileSources(t *testing.T) {
+	cfg := validConfig()
+	cfg.Scriptorium.ProfileDir = "./profiles"
+	cfg.Scriptorium.ProfileFile = "./profiles.yml"
+
+	err := cfg.Validate()
+	if err == nil || !strings.Contains(err.Error(), "mutually exclusive") {
+		t.Fatalf("expected Scriptorium source conflict, got %v", err)
 	}
 }
 
@@ -116,20 +135,201 @@ func TestValidateRejectsInvalidDiagnosticsRetention(t *testing.T) {
 	}
 }
 
+func TestValidateRejectsInvalidWorkspaceDiagnosticsRetention(t *testing.T) {
+	cfg := validConfig()
+	cfg.Workspace.Diagnostics.Retention = diagnostics.RetentionMode("sometimes")
+	cfg.Workspace.Diagnostics.retentionSet = true
+
+	err := cfg.Validate()
+	if err == nil || !strings.Contains(err.Error(), "workspace diagnostics retention") {
+		t.Fatalf("expected workspace retention error, got %v", err)
+	}
+}
+
+func TestValidateRejectsInvalidReferenceMaps(t *testing.T) {
+	tests := []struct {
+		name   string
+		mutate func(Config) Config
+		want   []string
+	}{
+		{
+			name: "empty chunk slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.Chunk.References = map[string]string{" ": "./roster.yml"}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "chunk", "reference slot", "empty"},
+		},
+		{
+			name: "empty chunk source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.Chunk.References = map[string]string{"roster": " "}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "chunk", "roster", "source", "empty"},
+		},
+		{
+			name: "empty extract slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.Extract.References = map[string]string{" ": "./roster.yml"}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "extract", "reference slot", "empty"},
+		},
+		{
+			name: "empty extract source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.Extract.References = map[string]string{"roster": " "}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "extract", "roster", "source", "empty"},
+		},
+		{
+			name: "empty normalize slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.Normalize.References = map[string]string{" ": "./roster.yml"}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "normalize", "reference slot", "empty"},
+		},
+		{
+			name: "empty normalize source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.Normalize.References = map[string]string{"roster": " "}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "normalize", "roster", "source", "empty"},
+		},
+		{
+			name: "empty pipeline slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.References = map[string]string{" ": "./roster.yml"}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "reference slot", "empty"},
+		},
+		{
+			name: "empty pipeline source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.References = map[string]string{"roster": " "}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "roster", "source", "empty"},
+		},
+		{
+			name: "empty lane slot",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.References = map[string]string{" ": "./roster.yml"}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "reference slot", "empty"},
+		},
+		{
+			name: "empty lane source",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				lane := profile.Artifacts["events"]
+				lane.References = map[string]string{"roster": " "}
+				profile.Artifacts["events"] = lane
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "events", "roster", "source", "empty"},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.mutate(validConfig()).Validate()
+			if err == nil {
+				t.Fatal("Validate() error = nil, want error")
+			}
+			for _, want := range tc.want {
+				if !strings.Contains(err.Error(), want) {
+					t.Fatalf("Validate() error = %q, want substring %q", err.Error(), want)
+				}
+			}
+		})
+	}
+}
+
+func TestValidateRejectsReferencesOnUnsupportedBindings(t *testing.T) {
+	tests := []struct {
+		name   string
+		mutate func(Config) Config
+		want   []string
+	}{
+		{
+			name: "input",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.Input.References = map[string]string{"roster": "./roster.yml"}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "input", "references", "not supported"},
+		},
+		{
+			name: "output",
+			mutate: func(cfg Config) Config {
+				profile := cfg.Pipelines["example"]
+				profile.Output.References = map[string]string{"roster": "./roster.yml"}
+				cfg.Pipelines["example"] = profile
+				return cfg
+			},
+			want: []string{"example", "output", "references", "not supported"},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.mutate(validConfig()).Validate()
+			if err == nil {
+				t.Fatal("Validate() error = nil, want error")
+			}
+			for _, want := range tc.want {
+				if !strings.Contains(err.Error(), want) {
+					t.Fatalf("Validate() error = %q, want substring %q", err.Error(), want)
+				}
+			}
+		})
+	}
+}
+
 func TestValidateRejectsEmptyIDs(t *testing.T) {
 	tests := []struct {
 		name   string
 		mutate func(Config) Config
 		want   string
 	}{
-		{
-			name: "LLM profile",
-			mutate: func(cfg Config) Config {
-				cfg.LLMProfiles[" "] = LLMProfile{}
-				return cfg
-			},
-			want: "LLM profile id",
-		},
 		{
 			name: "pipeline",
 			mutate: func(cfg Config) Config {
@@ -156,14 +356,6 @@ func TestValidateRejectsIDsDuplicatedAfterTrimming(t *testing.T) {
 		mutate func(Config) Config
 		want   string
 	}{
-		{
-			name: "LLM profile",
-			mutate: func(cfg Config) Config {
-				cfg.LLMProfiles[" default "] = cfg.LLMProfiles["default"]
-				return cfg
-			},
-			want: "duplicated",
-		},
 		{
 			name: "pipeline",
 			mutate: func(cfg Config) Config {
@@ -184,31 +376,101 @@ func TestValidateRejectsIDsDuplicatedAfterTrimming(t *testing.T) {
 	}
 }
 
-func TestValidateUsesTrimmedLLMProfileIDs(t *testing.T) {
+func TestValidateRejectsConfiguredValidators(t *testing.T) {
 	cfg := validConfig()
-	cfg.LLMProfiles[" default "] = cfg.LLMProfiles["default"]
-	delete(cfg.LLMProfiles, "default")
+	profile := cfg.Pipelines["example"]
+	lane := profile.Artifacts["events"]
+	lane.Validators = []pipeline.ModuleBinding{pipeline.Binding("fake/validator")}
+	profile.Artifacts["events"] = lane
+	cfg.Pipelines["example"] = profile
+
+	err := cfg.Validate()
+	if err == nil {
+		t.Fatal("Validate() error = nil, want configured validators error")
+	}
+	for _, want := range []string{"example", "events", "validators", "extract.validators", "merge.validators", "normalize.validators"} {
+		if !strings.Contains(err.Error(), want) {
+			t.Fatalf("Validate() error = %q, want substring %q", err.Error(), want)
+		}
+	}
+}
+
+func TestValidateAcceptsStageLocalValidatorOverrides(t *testing.T) {
+	cfg := validConfig()
+	profile := cfg.Pipelines["example"]
+	profile.Chunk.Validators = pipeline.ValidatorOverride{Set: true}
+	lane := profile.Artifacts["events"]
+	lane.Extract.Validators = pipeline.ValidatorOverride{
+		Set: true,
+		Validators: []pipeline.ModuleBinding{
+			pipeline.Binding("fake/validator"),
+			{Module: "fake/llm-validator", LLMProfile: "careful", Options: map[string]any{"threshold": 0.7}},
+		},
+	}
+	lane.Merge.Validators = pipeline.ValidatorOverride{Set: true}
+	profile.Artifacts["events"] = lane
+	cfg.Pipelines["example"] = profile
 
 	if err := cfg.Validate(); err != nil {
-		t.Fatalf("Validate: %v", err)
+		t.Fatalf("Validate() error = %v, want nil", err)
 	}
-	if _, ok := cfg.LLMProfile("default"); !ok {
-		t.Fatalf("expected trimmed LLM profile lookup to succeed")
+}
+
+func TestValidateRejectsInvalidValidatorBindings(t *testing.T) {
+	tests := []struct {
+		name    string
+		binding pipeline.ModuleBinding
+		want    string
+	}{
+		{
+			name:    "empty module",
+			binding: pipeline.ModuleBinding{},
+			want:    "module must not be empty",
+		},
+		{
+			name:    "references",
+			binding: pipeline.ModuleBinding{Module: "fake/validator", References: map[string]string{"roster": "./roster.txt"}},
+			want:    "references are not supported",
+		},
+		{
+			name:    "nested validators",
+			binding: pipeline.ModuleBinding{Module: "fake/validator", Validators: pipeline.ValidatorOverride{Set: true}},
+			want:    "nested validators are not supported",
+		},
+		{
+			name:    "retries",
+			binding: pipeline.ModuleBinding{Module: "fake/validator", Retries: 1},
+			want:    "retries are not supported",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			cfg := validConfig()
+			profile := cfg.Pipelines["example"]
+			lane := profile.Artifacts["events"]
+			lane.Extract.Validators = pipeline.ValidatorOverride{
+				Set:        true,
+				Validators: []pipeline.ModuleBinding{test.binding},
+			}
+			profile.Artifacts["events"] = lane
+			cfg.Pipelines["example"] = profile
+
+			err := cfg.Validate()
+			if err == nil || !strings.Contains(err.Error(), test.want) {
+				t.Fatalf("Validate() error = %v, want %q", err, test.want)
+			}
+		})
 	}
 }
 
 func validConfig() Config {
 	cfg := Default()
-	profile := cfg.LLMProfiles["default"]
-	profile.BaseURL = "https://example.invalid/v1"
-	profile.Model = "test-model"
-	cfg.LLMProfiles["default"] = profile
 	cfg.Pipelines["example"] = pipeline.PipelineProfile{
 		Input: pipeline.Binding("fake/input"),
 		Artifacts: map[string]pipeline.ArtifactLaneProfile{
 			"events": {
-				Extract:    pipeline.Binding("fake/extract"),
-				Validators: []pipeline.ModuleBinding{pipeline.Binding("fake/validator")},
+				Extract: pipeline.Binding("fake/extract"),
 			},
 			"notes": {
 				Extract: pipeline.Binding("fake/extract"),
@@ -256,6 +518,12 @@ func fakeCatalog(t *testing.T, overrides ...pipeline.ModuleSpec) pipeline.Module
 			Requires: []string{"normalized"},
 			Provides: []string{"validated"},
 		},
+		"fake/llm-validator": {
+			Key:      "fake/llm-validator",
+			Stage:    pipeline.StageValidate,
+			Requires: []string{"normalized"},
+			Provides: []string{"validated"},
+		},
 		"json": {
 			Key:      "json",
 			Stage:    pipeline.StageOutput,
@@ -265,6 +533,11 @@ func fakeCatalog(t *testing.T, overrides ...pipeline.ModuleSpec) pipeline.Module
 	for _, override := range overrides {
 		specs[override.Key] = override
 	}
+	for _, key := range []string{"fake/extract", "appendorder", "noop"} {
+		spec := specs[key]
+		spec.ArtifactKind = fakeArtifactKind
+		specs[key] = spec
+	}
 
 	inputs := pipeline.NewInputAdapterRegistry()
 	chunkers := pipeline.NewChunkerRegistry()
@@ -280,16 +553,24 @@ func fakeCatalog(t *testing.T, overrides ...pipeline.ModuleSpec) pipeline.Module
 	mustRegisterMerger(t, mergers, specs["appendorder"])
 	mustRegisterNormalizer(t, normalizers, specs["noop"])
 	mustRegisterValidator(t, validators, specs["fake/validator"])
+	mustRegisterValidator(t, validators, specs["fake/llm-validator"])
 	mustRegisterOutput(t, outputs, specs["json"])
 
+	codecs := pipeline.NewArtifactCodecRegistry()
+	if err := pipeline.RegisterArtifactCodec(codecs, fakeArtifactCodec{}); err != nil {
+		t.Fatalf("register artifact codec: %v", err)
+	}
+
 	return pipeline.ModuleCatalog{
-		Inputs:      inputs,
-		Chunkers:    chunkers,
-		Extractors:  extractors,
-		Mergers:     mergers,
-		Normalizers: normalizers,
-		Validators:  validators,
-		Outputs:     outputs,
+		Inputs:          inputs,
+		Chunkers:        chunkers,
+		ArtifactCodecs:  codecs,
+		Extractors:      extractors,
+		Mergers:         mergers,
+		Normalizers:     normalizers,
+		Validators:      validators,
+		ValidatorChains: pipeline.NewValidatorChainRegistry(),
+		Outputs:         outputs,
 	}
 }
 
@@ -309,32 +590,69 @@ func mustRegisterChunker(t *testing.T, registry *pipeline.ChunkerRegistry, spec
 
 func mustRegisterExtractor(t *testing.T, registry *pipeline.ExtractorRegistry, spec pipeline.ModuleSpec) {
 	t.Helper()
-	if err := registry.RegisterWithSpec(spec, func() (contracts.Extractor, error) { return nil, nil }); err != nil {
+	validateOptions := func(options map[string]any) error {
+		if err := pipeline.RejectUnknownOptions(options, "temperature"); err != nil {
+			return err
+		}
+		if value, ok := options["temperature"]; ok {
+			if _, ok := value.(float64); !ok {
+				return fmt.Errorf("temperature must be a number")
+			}
+		}
+		return nil
+	}
+	if err := pipeline.RegisterExtractorBuilder[fakeArtifact](registry, spec, validateOptions, func(pipeline.BuildRequest) (contracts.Extractor[fakeArtifact], error) { return nil, nil }); err != nil {
 		t.Fatalf("register extractor: %v", err)
 	}
 }
 
 func mustRegisterMerger(t *testing.T, registry *pipeline.MergerRegistry, spec pipeline.ModuleSpec) {
 	t.Helper()
-	if err := registry.RegisterWithSpec(spec, func() (contracts.Merger, error) { return nil, nil }); err != nil {
+	if err := pipeline.RegisterMerger[fakeArtifact](registry, spec, func() (contracts.Merger[fakeArtifact], error) { return nil, nil }); err != nil {
 		t.Fatalf("register merger: %v", err)
 	}
 }
 
 func mustRegisterNormalizer(t *testing.T, registry *pipeline.NormalizerRegistry, spec pipeline.ModuleSpec) {
 	t.Helper()
-	if err := registry.RegisterWithSpec(spec, func() (contracts.Normalizer, error) { return nil, nil }); err != nil {
+	if err := pipeline.RegisterNormalizer[fakeArtifact](registry, spec, func() (contracts.Normalizer[fakeArtifact], error) { return nil, nil }); err != nil {
 		t.Fatalf("register normalizer: %v", err)
 	}
 }
 
 func mustRegisterValidator(t *testing.T, registry *pipeline.ValidatorRegistry, spec pipeline.ModuleSpec) {
 	t.Helper()
-	if err := registry.RegisterWithSpec(spec, func() (contracts.Validator, error) { return nil, nil }); err != nil {
+	executionClass := contracts.ExecutionClassDeterministic
+	if spec.Key == "fake/llm-validator" {
+		executionClass = contracts.ExecutionClassLLMBacked
+	}
+	validatorSpec := pipeline.ValidatorSpec{Key: spec.Key, ExecutionClass: executionClass}
+	if err := pipeline.RegisterTypedValidator[fakeArtifact](registry, fakeArtifactKind, validatorSpec, func() (contracts.TypedValidator[fakeArtifact], error) { return nil, nil }); err != nil {
 		t.Fatalf("register validator: %v", err)
 	}
 }
 
+const fakeArtifactKind contracts.ArtifactKind = "test/artifact"
+
+type fakeArtifact string
+
+type fakeArtifactCodec struct{}
+
+func (fakeArtifactCodec) Kind() contracts.ArtifactKind { return fakeArtifactKind }
+func (fakeArtifactCodec) Schema() contracts.ArtifactSchema {
+	return contracts.ArtifactSchema{ID: "urn:notarius:test:artifact", Name: "Test artifact", Version: "1", JSONSchema: []byte(`{"type":"string"}`)}
+}
+func (fakeArtifactCodec) MediaType() string { return "application/json" }
+func (fakeArtifactCodec) Encode(value fakeArtifact) ([]byte, error) {
+	return []byte(fmt.Sprintf("%q", value)), nil
+}
+func (fakeArtifactCodec) Decode(content []byte) (fakeArtifact, error) {
+	if len(content) < 2 {
+		return "", fmt.Errorf("invalid test artifact")
+	}
+	return fakeArtifact(content[1 : len(content)-1]), nil
+}
+
 func mustRegisterOutput(t *testing.T, registry *pipeline.OutputEncoderRegistry, spec pipeline.ModuleSpec) {
 	t.Helper()
 	if err := registry.RegisterWithSpec(spec, func() (contracts.OutputEncoder, error) { return nil, nil }); err != nil {

internal/core/diagnostics/artifacts.go

@@ -4,6 +4,8 @@ const (
 	ArtifactInvocationMetadata = "invocation.json"
 	ArtifactEffectiveConfig    = "effective-config.json"
 	ArtifactResolvedPipeline   = "resolved-pipeline.json"
+	ArtifactResolvedReferences = "resolved-references.json"
+	ArtifactCheckpointEvents   = "checkpoint-events.json"
 	ArtifactSourceDocument     = "source-document.json"
 	ArtifactRunManifest        = "run-manifest.json"
 	ArtifactRunReport          = "run-report.json"

internal/core/diagnostics/artifacts_test.go

@@ -7,6 +7,7 @@ func TestArtifactNamesUseExtractionOrientedNames(t *testing.T) {
 		ArtifactInvocationMetadata,
 		ArtifactEffectiveConfig,
 		ArtifactResolvedPipeline,
+		ArtifactResolvedReferences,
 		ArtifactSourceDocument,
 		ArtifactRunManifest,
 		ArtifactRunReport,

internal/core/diagnostics/run_dir.go

@@ -51,6 +51,7 @@ type InvocationMetadata struct {
 	Operation      string    `json:"operation"`
 	PipelineID     string    `json:"pipeline_id,omitempty"`
 	PipelineDigest string    `json:"pipeline_digest,omitempty"`
+	Resume         bool      `json:"resume,omitempty"`
 	InputPath      string    `json:"input_path,omitempty"`
 	ConfigPath     string    `json:"config_path,omitempty"`
 	ConfigSource   string    `json:"config_source,omitempty"`
@@ -149,6 +150,14 @@ func (r *RunDirectory) WriteResolvedPipeline(payload any) error {
 	return r.WriteJSONArtifact(ArtifactResolvedPipeline, payload)
 }
 
+func (r *RunDirectory) WriteResolvedReferences(payload any) error {
+	return r.WriteJSONArtifact(ArtifactResolvedReferences, payload)
+}
+
+func (r *RunDirectory) WriteCheckpointEvents(payload any) error {
+	return r.WriteJSONArtifact(ArtifactCheckpointEvents, payload)
+}
+
 func (r *RunDirectory) WriteSourceDocument(payload any) error {
 	return r.WriteJSONArtifact(ArtifactSourceDocument, payload)
 }

internal/core/diagnostics/run_dir_test.go

@@ -191,6 +191,9 @@ func TestWriteTypedArtifacts(t *testing.T) {
 	if err := runDir.WriteResolvedPipeline(map[string]any{"pipeline": "test"}); err != nil {
 		t.Fatalf("WriteResolvedPipeline: %v", err)
 	}
+	if err := runDir.WriteResolvedReferences([]artifacts.ReferenceProvenance{{LaneID: "events", SlotName: "roster"}}); err != nil {
+		t.Fatalf("WriteResolvedReferences: %v", err)
+	}
 	if err := runDir.WriteSourceDocument(map[string]any{"source_id": "source-1"}); err != nil {
 		t.Fatalf("WriteSourceDocument: %v", err)
 	}
@@ -207,6 +210,7 @@ func TestWriteTypedArtifacts(t *testing.T) {
 	for _, name := range []string{
 		ArtifactEffectiveConfig,
 		ArtifactResolvedPipeline,
+		ArtifactResolvedReferences,
 		ArtifactSourceDocument,
 		ArtifactRunManifest,
 		ArtifactRunReport,

internal/core/source/digest.go

@@ -0,0 +1,65 @@
+package source
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+)
+
+// DigestDocument returns a deterministic digest of the canonical source
+// document content. The existing Digest field is excluded from its own digest.
+func DigestDocument(doc *SourceDocument) (string, error) {
+	if doc == nil {
+		return "", fmt.Errorf("source document must not be nil")
+	}
+	payload := struct {
+		ID       string         `json:"id"`
+		Kind     string         `json:"kind"`
+		Format   string         `json:"format"`
+		Units    []SourceUnit   `json:"units"`
+		Metadata map[string]any `json:"metadata,omitempty"`
+	}{
+		ID:       doc.ID,
+		Kind:     doc.Kind,
+		Format:   doc.Format,
+		Units:    doc.Units,
+		Metadata: doc.Metadata,
+	}
+	encoded, err := json.Marshal(payload)
+	if err != nil {
+		return "", fmt.Errorf("encode source document for digest: %w", err)
+	}
+	sum := sha256.Sum256(encoded)
+	return "sha256:" + hex.EncodeToString(sum[:]), nil
+}
+
+// DigestChunk returns a deterministic digest of a chunk, including its source
+// provenance, content, units, and metadata.
+func DigestChunk(chunk Chunk) (string, error) {
+	payload := struct {
+		ID        string         `json:"id"`
+		SourceID  string         `json:"source_id"`
+		Index     int            `json:"index"`
+		Ref       SourceRef      `json:"ref"`
+		Content   []byte         `json:"content"`
+		MediaType string         `json:"media_type"`
+		Units     []SourceUnit   `json:"units"`
+		Metadata  map[string]any `json:"metadata,omitempty"`
+	}{
+		ID:        chunk.ID,
+		SourceID:  chunk.SourceID,
+		Index:     chunk.Index,
+		Ref:       chunk.Ref,
+		Content:   chunk.Content,
+		MediaType: chunk.MediaType,
+		Units:     chunk.Units,
+		Metadata:  chunk.Metadata,
+	}
+	encoded, err := json.Marshal(payload)
+	if err != nil {
+		return "", fmt.Errorf("encode source chunk for digest: %w", err)
+	}
+	sum := sha256.Sum256(encoded)
+	return "sha256:" + hex.EncodeToString(sum[:]), nil
+}

internal/core/source/source.go

@@ -10,14 +10,26 @@ type SourceDocument struct {
 }
 
 type SourceUnit struct {
-	ID       string         `json:"id"`
+	ID       int            `json:"id"`
 	Kind     string         `json:"kind"`
 	Text     string         `json:"text"`
+	Ref      SourceRef      `json:"ref"`
 	Metadata map[string]any `json:"metadata,omitempty"`
 }
 
 type SourceRef struct {
 	SourceID    string `json:"source_id"`
-	StartUnitID string `json:"start_unit_id"`
-	EndUnitID   string `json:"end_unit_id"`
+	StartUnitID int    `json:"start_unit_id"`
+	EndUnitID   int    `json:"end_unit_id"`
+}
+
+type Chunk struct {
+	ID        string         `json:"id"`
+	SourceID  string         `json:"source_id"`
+	Index     int            `json:"index"`
+	Ref       SourceRef      `json:"ref"`
+	Content   []byte         `json:"-"`
+	MediaType string         `json:"media_type"`
+	Units     []SourceUnit   `json:"units"`
+	Metadata  map[string]any `json:"metadata,omitempty"`
 }

internal/core/source/source_test.go

@@ -96,13 +96,8 @@ func TestValidateDocumentMissingUnitFields(t *testing.T) {
 	}{
 		{
 			name:    "id",
-			mutate:  func(doc *SourceDocument) { doc.Units[1].ID = "" },
-			wantErr: "source unit[1].id must not be empty",
-		},
-		{
-			name:    "id surrounding whitespace",
-			mutate:  func(doc *SourceDocument) { doc.Units[1].ID = " u2 " },
-			wantErr: "source unit[1].id \" u2 \" must not contain leading or trailing whitespace",
+			mutate:  func(doc *SourceDocument) { doc.Units[1].ID = 0 },
+			wantErr: "source unit[1].id must be positive",
 		},
 		{
 			name:    "kind",
@@ -135,24 +130,140 @@ func TestValidateDocumentMissingUnitFields(t *testing.T) {
 
 func TestValidateDocumentDuplicateUnitIDs(t *testing.T) {
 	doc := validDocument()
-	doc.Units[1].ID = "u1"
+	doc.Units[1].ID = 1
 
 	err := ValidateDocument(doc)
 
 	if err == nil {
 		t.Fatal("ValidateDocument() error = nil, want error")
 	}
-	if err.Error() != "source unit id \"u1\" is duplicated" {
+	if err.Error() != "source unit id 1 is duplicated" {
 		t.Fatalf("ValidateDocument() error = %q", err.Error())
 	}
 }
 
+func TestValidateDocumentUnitReferences(t *testing.T) {
+	tests := []struct {
+		name    string
+		mutate  func(*SourceDocument)
+		wantErr string
+	}{
+		{
+			name:    "missing",
+			mutate:  func(doc *SourceDocument) { doc.Units[0].Ref = SourceRef{} },
+			wantErr: "source unit[0].ref: source ref source_id must not be empty",
+		},
+		{
+			name:    "foreign source",
+			mutate:  func(doc *SourceDocument) { doc.Units[0].Ref.SourceID = "source-2" },
+			wantErr: "source unit[0].ref: source ref source_id \"source-2\" does not match document id \"source-1\"",
+		},
+		{
+			name: "non-self range",
+			mutate: func(doc *SourceDocument) {
+				doc.Units[0].Ref.StartUnitID = 2
+				doc.Units[0].Ref.EndUnitID = 2
+			},
+			wantErr: "source unit[0].ref must identify source unit id 1",
+		},
+		{
+			name: "reversed range",
+			mutate: func(doc *SourceDocument) {
+				doc.Units[0].Ref.StartUnitID = 2
+				doc.Units[0].Ref.EndUnitID = 1
+			},
+			wantErr: "source unit[0].ref: source ref start_unit_id 2 appears after end_unit_id 1",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			doc := validDocument()
+			tt.mutate(doc)
+
+			err := ValidateDocument(doc)
+			if err == nil {
+				t.Fatal("ValidateDocument() error = nil, want unit reference error")
+			}
+			if err.Error() != tt.wantErr {
+				t.Fatalf("ValidateDocument() error = %q, want %q", err.Error(), tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestDigestDocumentIsDeterministicAndIncludesUnitReference(t *testing.T) {
+	doc := validDocument()
+	doc.Metadata = map[string]any{"second": "value", "first": true}
+	first, err := DigestDocument(doc)
+	if err != nil {
+		t.Fatalf("DigestDocument() error = %v, want nil", err)
+	}
+
+	reordered := validDocument()
+	reordered.Metadata = map[string]any{"first": true, "second": "value"}
+	second, err := DigestDocument(reordered)
+	if err != nil {
+		t.Fatalf("DigestDocument(reordered) error = %v, want nil", err)
+	}
+	if first != second {
+		t.Fatalf("digests = %q and %q, want deterministic map ordering", first, second)
+	}
+
+	changed := validDocument()
+	changed.Metadata = map[string]any{"first": true, "second": "value"}
+	changed.Units[0].Ref.SourceID = "different-source"
+	changedDigest, err := DigestDocument(changed)
+	if err != nil {
+		t.Fatalf("DigestDocument(changed) error = %v, want nil", err)
+	}
+	if first == changedDigest {
+		t.Fatalf("digest = %q after reference change, want different digest", changedDigest)
+	}
+}
+
+func TestDigestChunkIsDeterministicAndIncludesReference(t *testing.T) {
+	doc := validDocument()
+	chunk := Chunk{
+		ID:        "chunk-1",
+		SourceID:  doc.ID,
+		Index:     0,
+		Ref:       SourceRef{SourceID: doc.ID, StartUnitID: 1, EndUnitID: 2},
+		Content:   []byte("chunk content"),
+		MediaType: "text/plain",
+		Units:     doc.Units,
+		Metadata:  map[string]any{"second": "value", "first": true},
+	}
+	first, err := DigestChunk(chunk)
+	if err != nil {
+		t.Fatalf("DigestChunk() error = %v, want nil", err)
+	}
+
+	chunk.Metadata = map[string]any{"first": true, "second": "value"}
+	second, err := DigestChunk(chunk)
+	if err != nil {
+		t.Fatalf("DigestChunk(reordered metadata) error = %v, want nil", err)
+	}
+	if first != second {
+		t.Fatalf("digests = %q and %q, want deterministic map ordering", first, second)
+	}
+
+	chunk.Ref.EndUnitID = 1
+	changed, err := DigestChunk(chunk)
+	if err != nil {
+		t.Fatalf("DigestChunk(changed ref) error = %v, want nil", err)
+	}
+	if first == changed {
+		t.Fatalf("digest = %q after reference change, want different digest", changed)
+	}
+}
+
 func TestValidateRefValid(t *testing.T) {
 	doc := validDocument()
 	ref := SourceRef{
 		SourceID:    "source-1",
-		StartUnitID: "u1",
-		EndUnitID:   "u2",
+		StartUnitID: 1,
+		EndUnitID:   2,
 	}
 
 	if err := ValidateRef(doc, ref); err != nil {
@@ -164,8 +275,8 @@ func TestValidateRefSourceIDMismatch(t *testing.T) {
 	doc := validDocument()
 	ref := SourceRef{
 		SourceID:    "source-2",
-		StartUnitID: "u1",
-		EndUnitID:   "u2",
+		StartUnitID: 1,
+		EndUnitID:   2,
 	}
 
 	err := ValidateRef(doc, ref)
@@ -186,43 +297,33 @@ func TestValidateRefMissingUnitIDs(t *testing.T) {
 	}{
 		{
 			name:    "missing source id",
-			ref:     SourceRef{StartUnitID: "u1", EndUnitID: "u2"},
+			ref:     SourceRef{StartUnitID: 1, EndUnitID: 2},
 			wantErr: "source ref source_id must not be empty",
 		},
 		{
 			name:    "source id surrounding whitespace",
-			ref:     SourceRef{SourceID: " source-1 ", StartUnitID: "u1", EndUnitID: "u2"},
+			ref:     SourceRef{SourceID: " source-1 ", StartUnitID: 1, EndUnitID: 2},
 			wantErr: "source ref source_id \" source-1 \" must not contain leading or trailing whitespace",
 		},
 		{
 			name:    "missing start id",
-			ref:     SourceRef{SourceID: "source-1", EndUnitID: "u2"},
-			wantErr: "source ref start_unit_id must not be empty",
-		},
-		{
-			name:    "start id surrounding whitespace",
-			ref:     SourceRef{SourceID: "source-1", StartUnitID: " u1 ", EndUnitID: "u2"},
-			wantErr: "source ref start_unit_id \" u1 \" must not contain leading or trailing whitespace",
+			ref:     SourceRef{SourceID: "source-1", EndUnitID: 2},
+			wantErr: "source ref start_unit_id must be positive",
 		},
 		{
 			name:    "missing end id",
-			ref:     SourceRef{SourceID: "source-1", StartUnitID: "u1"},
-			wantErr: "source ref end_unit_id must not be empty",
-		},
-		{
-			name:    "end id surrounding whitespace",
-			ref:     SourceRef{SourceID: "source-1", StartUnitID: "u1", EndUnitID: " u2 "},
-			wantErr: "source ref end_unit_id \" u2 \" must not contain leading or trailing whitespace",
+			ref:     SourceRef{SourceID: "source-1", StartUnitID: 1},
+			wantErr: "source ref end_unit_id must be positive",
 		},
 		{
 			name:    "unknown start id",
-			ref:     SourceRef{SourceID: "source-1", StartUnitID: "u9", EndUnitID: "u2"},
-			wantErr: "source ref start_unit_id \"u9\" was not found",
+			ref:     SourceRef{SourceID: "source-1", StartUnitID: 9, EndUnitID: 2},
+			wantErr: "source ref start_unit_id 9 was not found",
 		},
 		{
 			name:    "unknown end id",
-			ref:     SourceRef{SourceID: "source-1", StartUnitID: "u1", EndUnitID: "u9"},
-			wantErr: "source ref end_unit_id \"u9\" was not found",
+			ref:     SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 9},
+			wantErr: "source ref end_unit_id 9 was not found",
 		},
 	}
 
@@ -244,8 +345,8 @@ func TestValidateRefReversedUnitOrder(t *testing.T) {
 	doc := validDocument()
 	ref := SourceRef{
 		SourceID:    "source-1",
-		StartUnitID: "u2",
-		EndUnitID:   "u1",
+		StartUnitID: 2,
+		EndUnitID:   1,
 	}
 
 	err := ValidateRef(doc, ref)
@@ -261,7 +362,7 @@ func TestValidateRefReversedUnitOrder(t *testing.T) {
 func TestUnitIndex(t *testing.T) {
 	doc := validDocument()
 
-	index, ok := UnitIndex(doc, "u2")
+	index, ok := UnitIndex(doc, 2)
 	if !ok {
 		t.Fatal("UnitIndex() ok = false, want true")
 	}
@@ -269,7 +370,7 @@ func TestUnitIndex(t *testing.T) {
 		t.Fatalf("UnitIndex() index = %d, want 1", index)
 	}
 
-	index, ok = UnitIndex(doc, "u9")
+	index, ok = UnitIndex(doc, 9)
 	if ok {
 		t.Fatal("UnitIndex() ok = true, want false")
 	}
@@ -286,14 +387,16 @@ func validDocument() *SourceDocument {
 		Digest: "sha256:abc123",
 		Units: []SourceUnit{
 			{
-				ID:   "u1",
+				ID:   1,
 				Kind: "paragraph",
 				Text: "First unit.",
+				Ref:  SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 1},
 			},
 			{
-				ID:   "u2",
+				ID:   2,
 				Kind: "paragraph",
 				Text: "Second unit.",
+				Ref:  SourceRef{SourceID: "source-1", StartUnitID: 2, EndUnitID: 2},
 			},
 		},
 	}

internal/core/source/validation.go

@@ -28,13 +28,10 @@ func ValidateDocument(doc *SourceDocument) error {
 		return fmt.Errorf("source document units must not be empty")
 	}
 
-	seenUnitIDs := make(map[string]struct{}, len(doc.Units))
+	seenUnitIDs := make(map[int]struct{}, len(doc.Units))
 	for i, unit := range doc.Units {
-		if isBlank(unit.ID) {
-			return fmt.Errorf("source unit[%d].id must not be empty", i)
-		}
-		if hasSurroundingWhitespace(unit.ID) {
-			return fmt.Errorf("source unit[%d].id %q must not contain leading or trailing whitespace", i, unit.ID)
+		if unit.ID <= 0 {
+			return fmt.Errorf("source unit[%d].id must be positive", i)
 		}
 		if isBlank(unit.Kind) {
 			return fmt.Errorf("source unit[%d].kind must not be empty", i)
@@ -43,10 +40,18 @@ func ValidateDocument(doc *SourceDocument) error {
 			return fmt.Errorf("source unit[%d].text must not be empty", i)
 		}
 		if _, ok := seenUnitIDs[unit.ID]; ok {
-			return fmt.Errorf("source unit id %q is duplicated", unit.ID)
+			return fmt.Errorf("source unit id %d is duplicated", unit.ID)
 		}
 		seenUnitIDs[unit.ID] = struct{}{}
 	}
+	for i, unit := range doc.Units {
+		if err := ValidateRef(doc, unit.Ref); err != nil {
+			return fmt.Errorf("source unit[%d].ref: %w", i, err)
+		}
+		if unit.Ref.StartUnitID != unit.ID || unit.Ref.EndUnitID != unit.ID {
+			return fmt.Errorf("source unit[%d].ref must identify source unit id %d", i, unit.ID)
+		}
+	}
 
 	return nil
 }
@@ -61,17 +66,11 @@ func ValidateRef(doc *SourceDocument, ref SourceRef) error {
 	if hasSurroundingWhitespace(ref.SourceID) {
 		return fmt.Errorf("source ref source_id %q must not contain leading or trailing whitespace", ref.SourceID)
 	}
-	if isBlank(ref.StartUnitID) {
-		return fmt.Errorf("source ref start_unit_id must not be empty")
+	if ref.StartUnitID <= 0 {
+		return fmt.Errorf("source ref start_unit_id must be positive")
 	}
-	if hasSurroundingWhitespace(ref.StartUnitID) {
-		return fmt.Errorf("source ref start_unit_id %q must not contain leading or trailing whitespace", ref.StartUnitID)
-	}
-	if isBlank(ref.EndUnitID) {
-		return fmt.Errorf("source ref end_unit_id must not be empty")
-	}
-	if hasSurroundingWhitespace(ref.EndUnitID) {
-		return fmt.Errorf("source ref end_unit_id %q must not contain leading or trailing whitespace", ref.EndUnitID)
+	if ref.EndUnitID <= 0 {
+		return fmt.Errorf("source ref end_unit_id must be positive")
 	}
 	if ref.SourceID != doc.ID {
 		return fmt.Errorf("source ref source_id %q does not match document id %q", ref.SourceID, doc.ID)
@@ -79,20 +78,20 @@ func ValidateRef(doc *SourceDocument, ref SourceRef) error {
 
 	startIndex, ok := UnitIndex(doc, ref.StartUnitID)
 	if !ok {
-		return fmt.Errorf("source ref start_unit_id %q was not found", ref.StartUnitID)
+		return fmt.Errorf("source ref start_unit_id %d was not found", ref.StartUnitID)
 	}
 	endIndex, ok := UnitIndex(doc, ref.EndUnitID)
 	if !ok {
-		return fmt.Errorf("source ref end_unit_id %q was not found", ref.EndUnitID)
+		return fmt.Errorf("source ref end_unit_id %d was not found", ref.EndUnitID)
 	}
 	if startIndex > endIndex {
-		return fmt.Errorf("source ref start_unit_id %q appears after end_unit_id %q", ref.StartUnitID, ref.EndUnitID)
+		return fmt.Errorf("source ref start_unit_id %d appears after end_unit_id %d", ref.StartUnitID, ref.EndUnitID)
 	}
 
 	return nil
 }
 
-func UnitIndex(doc *SourceDocument, unitID string) (int, bool) {
+func UnitIndex(doc *SourceDocument, unitID int) (int, bool) {
 	if doc == nil {
 		return 0, false
 	}

internal/core/workspace/files.go

@@ -0,0 +1,114 @@
+package workspace
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+func SafePath(root string, name string) (string, error) {
+	root = strings.TrimSpace(root)
+	if root == "" {
+		return "", fmt.Errorf("workspace root must not be empty")
+	}
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return "", fmt.Errorf("workspace artifact name must not be empty")
+	}
+	if strings.Contains(name, `\`) {
+		return "", fmt.Errorf("workspace artifact name %q must use slash-separated relative paths", name)
+	}
+	if path.IsAbs(name) || filepath.IsAbs(name) {
+		return "", fmt.Errorf("workspace artifact name %q must be relative", name)
+	}
+	if name == "." || strings.Contains(name, "..") {
+		return "", fmt.Errorf("workspace artifact name %q must not contain ..", name)
+	}
+	cleaned := path.Clean(name)
+	if cleaned != name {
+		return "", fmt.Errorf("workspace artifact name %q must be clean", name)
+	}
+
+	absRoot, err := filepath.Abs(root)
+	if err != nil {
+		return "", fmt.Errorf("resolve workspace root %q: %w", root, err)
+	}
+	target, err := filepath.Abs(filepath.Join(absRoot, filepath.FromSlash(cleaned)))
+	if err != nil {
+		return "", fmt.Errorf("resolve workspace artifact %q: %w", name, err)
+	}
+	rel, err := filepath.Rel(absRoot, target)
+	if err != nil {
+		return "", fmt.Errorf("resolve workspace artifact %q: %w", name, err)
+	}
+	if rel == "." || rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+		return "", fmt.Errorf("workspace artifact name %q resolves outside workspace root", name)
+	}
+	return target, nil
+}
+
+func WriteJSON(root string, name string, payload any) error {
+	target, err := SafePath(root, name)
+	if err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(payload, "", "  ")
+	if err != nil {
+		return fmt.Errorf("marshal workspace artifact %q: %w", name, err)
+	}
+	data = append(data, '\n')
+	if err := writeFileAtomic(target, data, 0o644); err != nil {
+		return fmt.Errorf("write workspace artifact %q: %w", name, err)
+	}
+	return nil
+}
+
+func WriteBytes(root string, name string, data []byte) error {
+	target, err := SafePath(root, name)
+	if err != nil {
+		return err
+	}
+	if err := writeFileAtomic(target, data, 0o644); err != nil {
+		return fmt.Errorf("write workspace artifact %q: %w", name, err)
+	}
+	return nil
+}
+
+func writeFileAtomic(target string, data []byte, perm os.FileMode) error {
+	dir := filepath.Dir(target)
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return err
+	}
+
+	temp, err := os.CreateTemp(dir, "."+filepath.Base(target)+".tmp-*")
+	if err != nil {
+		return err
+	}
+	tempPath := temp.Name()
+	removeTemp := true
+	defer func() {
+		if removeTemp {
+			_ = os.Remove(tempPath)
+		}
+	}()
+
+	if _, err := temp.Write(data); err != nil {
+		_ = temp.Close()
+		return err
+	}
+	if err := temp.Chmod(perm); err != nil {
+		_ = temp.Close()
+		return err
+	}
+	if err := temp.Close(); err != nil {
+		return err
+	}
+	if err := os.Rename(tempPath, target); err != nil {
+		return err
+	}
+	removeTemp = false
+	return nil
+}

internal/core/workspace/files_test.go

@@ -0,0 +1,148 @@
+package workspace
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestSafePathAcceptsCleanRelativePaths(t *testing.T) {
+	root := t.TempDir()
+
+	got, err := SafePath(root, "source/manifest.json")
+	if err != nil {
+		t.Fatalf("SafePath: %v", err)
+	}
+
+	want := filepath.Join(root, "source", "manifest.json")
+	if got != want {
+		t.Fatalf("SafePath = %q, want %q", got, want)
+	}
+}
+
+func TestSafePathRejectsUnsafeNames(t *testing.T) {
+	root := t.TempDir()
+	tests := []struct {
+		name string
+		path string
+		want string
+	}{
+		{name: "empty", path: " ", want: "empty"},
+		{name: "absolute", path: filepath.Join(root, "artifact.json"), want: "relative"},
+		{name: "parent segment", path: "../artifact.json", want: ".."},
+		{name: "embedded parent", path: "source/../artifact.json", want: ".."},
+		{name: "backslash", path: `source\artifact.json`, want: "slash-separated"},
+		{name: "unclean", path: "source//artifact.json", want: "clean"},
+		{name: "dot", path: ".", want: ".."},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got, err := SafePath(root, tc.path)
+			if err == nil {
+				t.Fatalf("SafePath returned %q, want error", got)
+			}
+			if !strings.Contains(err.Error(), tc.want) {
+				t.Fatalf("SafePath error = %v, want containing %q", err, tc.want)
+			}
+		})
+	}
+}
+
+func TestSafePathRejectsEmptyRoot(t *testing.T) {
+	got, err := SafePath(" ", "artifact.json")
+	if err == nil {
+		t.Fatalf("SafePath returned %q, want error", got)
+	}
+	if !strings.Contains(err.Error(), "root") {
+		t.Fatalf("SafePath error = %v, want root error", err)
+	}
+}
+
+func TestSafePathDoesNotPermitEscapingRoot(t *testing.T) {
+	root := t.TempDir()
+	for _, name := range []string{
+		"..",
+		"../outside.json",
+		"nested/../../outside.json",
+	} {
+		t.Run(name, func(t *testing.T) {
+			got, err := SafePath(root, name)
+			if err == nil {
+				t.Fatalf("SafePath returned %q, want error", got)
+			}
+		})
+	}
+}
+
+func TestWriteJSONWritesIndentedAtomicArtifact(t *testing.T) {
+	root := t.TempDir()
+
+	err := WriteJSON(root, "source/manifest.json", map[string]any{
+		"status": "succeeded",
+		"count":  2,
+	})
+	if err != nil {
+		t.Fatalf("WriteJSON: %v", err)
+	}
+
+	got := string(readFile(t, filepath.Join(root, "source", "manifest.json")))
+	if !strings.HasSuffix(got, "\n") {
+		t.Fatalf("expected trailing newline, got %q", got)
+	}
+	if !strings.Contains(got, `"status": "succeeded"`) || !strings.Contains(got, `"count": 2`) {
+		t.Fatalf("unexpected JSON: %s", got)
+	}
+	assertNoTempFiles(t, filepath.Join(root, "source"))
+}
+
+func TestWriteBytesWritesNestedArtifact(t *testing.T) {
+	root := t.TempDir()
+
+	if err := WriteBytes(root, "chunk/chunks.json", []byte("payload")); err != nil {
+		t.Fatalf("WriteBytes: %v", err)
+	}
+
+	got := string(readFile(t, filepath.Join(root, "chunk", "chunks.json")))
+	if got != "payload" {
+		t.Fatalf("bytes = %q, want payload", got)
+	}
+	assertNoTempFiles(t, filepath.Join(root, "chunk"))
+}
+
+func TestWritersRejectUnsafePaths(t *testing.T) {
+	root := t.TempDir()
+
+	if err := WriteBytes(root, "../outside.json", []byte("payload")); err == nil {
+		t.Fatalf("WriteBytes accepted unsafe path")
+	}
+	if err := WriteJSON(root, `debug\trace.json`, map[string]string{"x": "y"}); err == nil {
+		t.Fatalf("WriteJSON accepted unsafe path")
+	}
+	if _, err := os.Stat(filepath.Join(root, "..", "outside.json")); !os.IsNotExist(err) {
+		t.Fatalf("outside path stat err = %v, want not exist", err)
+	}
+}
+
+func readFile(t *testing.T, path string) []byte {
+	t.Helper()
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read %q: %v", path, err)
+	}
+	return data
+}
+
+func assertNoTempFiles(t *testing.T, dir string) {
+	t.Helper()
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		t.Fatalf("read dir %q: %v", dir, err)
+	}
+	for _, entry := range entries {
+		if strings.Contains(entry.Name(), ".tmp-") {
+			t.Fatalf("temporary file was not cleaned up: %s", entry.Name())
+		}
+	}
+}

internal/core/workspace/identity.go

@@ -0,0 +1,276 @@
+package workspace
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+const digestPrefixLength = 16
+
+type Fingerprint struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}
+
+type CheckpointIdentityInput struct {
+	Pipeline               pipeline.ResolvedPipeline
+	InputKey               string
+	RawInputDigest         string
+	SourceDigest           string
+	SelectedLanes          []string
+	RuntimeOverrides       []Fingerprint
+	References             []artifacts.ReferenceProvenance
+	ProvenanceFingerprints []Fingerprint
+}
+
+type CheckpointIdentity struct {
+	Digest                 string        `json:"digest"`
+	PipelineID             string        `json:"pipeline_id"`
+	PipelineDigest         string        `json:"pipeline_digest"`
+	InputKey               string        `json:"input_key"`
+	RawInputDigest         string        `json:"raw_input_digest,omitempty"`
+	SourceDigest           string        `json:"source_digest,omitempty"`
+	SelectedLanes          []string      `json:"selected_lanes,omitempty"`
+	RuntimeOverrides       []Fingerprint `json:"runtime_overrides,omitempty"`
+	ReferenceDigests       []Fingerprint `json:"reference_digests,omitempty"`
+	ProvenanceFingerprints []Fingerprint `json:"provenance_fingerprints,omitempty"`
+}
+
+func NewCheckpointIdentity(input CheckpointIdentityInput) (CheckpointIdentity, error) {
+	pipelineID := strings.TrimSpace(input.Pipeline.ID)
+	if pipelineID == "" {
+		return CheckpointIdentity{}, fmt.Errorf("checkpoint identity pipeline id must not be empty")
+	}
+	pipelineDigest := strings.TrimSpace(input.Pipeline.Digest)
+	if pipelineDigest == "" {
+		return CheckpointIdentity{}, fmt.Errorf("checkpoint identity pipeline digest must not be empty")
+	}
+	inputKey := strings.TrimSpace(input.InputKey)
+	if inputKey == "" {
+		inputKey = strings.TrimSpace(input.Pipeline.Input.Module)
+	}
+	if inputKey == "" {
+		return CheckpointIdentity{}, fmt.Errorf("checkpoint identity input key must not be empty")
+	}
+
+	rawInputDigest := strings.TrimSpace(input.RawInputDigest)
+	sourceDigest := strings.TrimSpace(input.SourceDigest)
+	if rawInputDigest == "" && sourceDigest == "" {
+		return CheckpointIdentity{}, fmt.Errorf("checkpoint identity raw input digest or source digest must be set")
+	}
+
+	identity := CheckpointIdentity{
+		PipelineID:             pipelineID,
+		PipelineDigest:         pipelineDigest,
+		InputKey:               inputKey,
+		RawInputDigest:         rawInputDigest,
+		SourceDigest:           sourceDigest,
+		SelectedLanes:          normalizedLanes(input.SelectedLanes, input.Pipeline.ArtifactLanes),
+		RuntimeOverrides:       normalizeFingerprints(input.RuntimeOverrides),
+		ReferenceDigests:       referenceFingerprints(input.References),
+		ProvenanceFingerprints: normalizeFingerprints(input.ProvenanceFingerprints),
+	}
+	digest, err := identityDigest(identity)
+	if err != nil {
+		return CheckpointIdentity{}, err
+	}
+	identity.Digest = digest
+	return identity, nil
+}
+
+func (s Settings) CheckpointDirectory(identity CheckpointIdentity) (string, error) {
+	if !s.ResumeEnabled || strings.TrimSpace(s.CheckpointsRoot) == "" {
+		return "", nil
+	}
+	relative, err := identity.RelativePath()
+	if err != nil {
+		return "", err
+	}
+	return SafePath(s.CheckpointsRoot, relative)
+}
+
+func (i CheckpointIdentity) RelativePath() (string, error) {
+	pipelineID, err := safePathComponent(i.PipelineID)
+	if err != nil {
+		return "", fmt.Errorf("checkpoint identity pipeline id: %w", err)
+	}
+	inputKey, err := safePathComponent(i.InputKey)
+	if err != nil {
+		return "", fmt.Errorf("checkpoint identity input key: %w", err)
+	}
+	sourceDigest := digestPrefix(i.SourceDigest)
+	if sourceDigest == "" {
+		sourceDigest = digestPrefix(i.RawInputDigest)
+	}
+	if sourceDigest == "" {
+		return "", fmt.Errorf("checkpoint identity source digest prefix must not be empty")
+	}
+	pipelineDigest := digestPrefix(i.PipelineDigest)
+	if pipelineDigest == "" {
+		return "", fmt.Errorf("checkpoint identity pipeline digest prefix must not be empty")
+	}
+	sourceComponent, err := safePathComponent(sourceDigest)
+	if err != nil {
+		return "", fmt.Errorf("checkpoint identity source digest: %w", err)
+	}
+	pipelineComponent, err := safePathComponent(pipelineDigest)
+	if err != nil {
+		return "", fmt.Errorf("checkpoint identity pipeline digest: %w", err)
+	}
+	identityDigest := digestPrefix(i.Digest)
+	if identityDigest == "" {
+		return "", fmt.Errorf("checkpoint identity digest prefix must not be empty")
+	}
+	identityComponent, err := safePathComponent(identityDigest)
+	if err != nil {
+		return "", fmt.Errorf("checkpoint identity digest: %w", err)
+	}
+	return filepath.ToSlash(filepath.Join(pipelineID, inputKey+"-"+sourceComponent, pipelineComponent, identityComponent)), nil
+}
+
+func identityDigest(identity CheckpointIdentity) (string, error) {
+	payload := identity
+	payload.Digest = ""
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return "", fmt.Errorf("marshal checkpoint identity: %w", err)
+	}
+	sum := sha256.Sum256(data)
+	return "sha256:" + hex.EncodeToString(sum[:]), nil
+}
+
+func normalizedLanes(selected []string, resolved []pipeline.ResolvedArtifactLane) []string {
+	if len(selected) > 0 {
+		return normalizeStrings(selected)
+	}
+	lanes := make([]string, 0, len(resolved))
+	for _, lane := range resolved {
+		lanes = append(lanes, lane.ID)
+	}
+	return normalizeStrings(lanes)
+}
+
+func normalizeFingerprints(values []Fingerprint) []Fingerprint {
+	if len(values) == 0 {
+		return nil
+	}
+	byName := make(map[string]string, len(values))
+	for _, value := range values {
+		name := strings.TrimSpace(value.Name)
+		fingerprint := strings.TrimSpace(value.Value)
+		if name == "" || fingerprint == "" {
+			continue
+		}
+		byName[name] = fingerprint
+	}
+	if len(byName) == 0 {
+		return nil
+	}
+	names := make([]string, 0, len(byName))
+	for name := range byName {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	out := make([]Fingerprint, 0, len(names))
+	for _, name := range names {
+		out = append(out, Fingerprint{Name: name, Value: byName[name]})
+	}
+	return out
+}
+
+func referenceFingerprints(references []artifacts.ReferenceProvenance) []Fingerprint {
+	if len(references) == 0 {
+		return nil
+	}
+	values := make([]Fingerprint, 0, len(references))
+	for _, reference := range references {
+		digest := strings.TrimSpace(reference.Digest)
+		if digest == "" {
+			continue
+		}
+		parts := []string{
+			strings.TrimSpace(reference.Stage),
+			strings.TrimSpace(reference.LaneID),
+			strings.TrimSpace(reference.SlotName),
+			strings.TrimSpace(reference.OriginURI),
+		}
+		values = append(values, Fingerprint{
+			Name:  strings.Join(parts, ":"),
+			Value: digest,
+		})
+	}
+	return normalizeFingerprints(values)
+}
+
+func normalizeStrings(values []string) []string {
+	if len(values) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{}, len(values))
+	for _, value := range values {
+		value = strings.TrimSpace(value)
+		if value == "" {
+			continue
+		}
+		seen[value] = struct{}{}
+	}
+	if len(seen) == 0 {
+		return nil
+	}
+	out := make([]string, 0, len(seen))
+	for value := range seen {
+		out = append(out, value)
+	}
+	sort.Strings(out)
+	return out
+}
+
+func digestPrefix(digest string) string {
+	digest = strings.TrimSpace(digest)
+	if digest == "" {
+		return ""
+	}
+	if idx := strings.Index(digest, ":"); idx >= 0 {
+		digest = digest[idx+1:]
+	}
+	digest = strings.TrimSpace(digest)
+	if len(digest) > digestPrefixLength {
+		return digest[:digestPrefixLength]
+	}
+	return digest
+}
+
+func safePathComponent(value string) (string, error) {
+	value = strings.TrimSpace(value)
+	if value == "" {
+		return "", fmt.Errorf("must not be empty")
+	}
+	var b strings.Builder
+	for _, r := range value {
+		switch {
+		case r >= 'a' && r <= 'z':
+			b.WriteRune(r)
+		case r >= 'A' && r <= 'Z':
+			b.WriteRune(r)
+		case r >= '0' && r <= '9':
+			b.WriteRune(r)
+		case r == '-' || r == '_' || r == '.':
+			b.WriteRune(r)
+		default:
+			b.WriteString(fmt.Sprintf("~%x", r))
+		}
+	}
+	encoded := b.String()
+	if encoded == "." || encoded == ".." || strings.Contains(encoded, "..") || strings.ContainsAny(encoded, `/\`) {
+		return "", fmt.Errorf("%q is not filesystem safe", value)
+	}
+	return encoded, nil
+}

internal/core/workspace/identity_test.go

@@ -0,0 +1,266 @@
+package workspace
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+func TestCheckpointIdentityIsDeterministic(t *testing.T) {
+	first := mustIdentity(t, identityInput())
+	second := mustIdentity(t, identityInput())
+
+	if first.Digest != second.Digest {
+		t.Fatalf("digest changed for same input: %q != %q", first.Digest, second.Digest)
+	}
+	if !strings.HasPrefix(first.Digest, "sha256:") {
+		t.Fatalf("digest = %q, want sha256 prefix", first.Digest)
+	}
+}
+
+func TestCheckpointIdentityChangesWhenInputsChange(t *testing.T) {
+	base := mustIdentity(t, identityInput())
+	tests := []struct {
+		name   string
+		mutate func(CheckpointIdentityInput) CheckpointIdentityInput
+	}{
+		{
+			name: "pipeline digest",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.Pipeline.Digest = "sha256:pipeline-b"
+				return input
+			},
+		},
+		{
+			name: "raw input digest",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.RawInputDigest = "sha256:raw-b"
+				return input
+			},
+		},
+		{
+			name: "selected lanes",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.SelectedLanes = []string{"items"}
+				return input
+			},
+		},
+		{
+			name: "reference digest",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.References[0].Digest = "sha256:reference-b"
+				return input
+			},
+		},
+		{
+			name: "runtime override",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.RuntimeOverrides = []Fingerprint{{Name: "llm_profile", Value: "careful"}}
+				return input
+			},
+		},
+		{
+			name: "provenance fingerprint",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.ProvenanceFingerprints = []Fingerprint{{Name: "prompt:dnd.spells", Value: "sha256:prompt-b"}}
+				return input
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			changed := mustIdentity(t, tc.mutate(identityInput()))
+			if changed.Digest == base.Digest {
+				t.Fatalf("digest did not change after %s mutation: %q", tc.name, changed.Digest)
+			}
+		})
+	}
+}
+
+func TestCheckpointIdentityNormalizesOrder(t *testing.T) {
+	input := identityInput()
+	input.SelectedLanes = []string{"spells", "items", "spells"}
+	input.RuntimeOverrides = []Fingerprint{
+		{Name: "z", Value: "2"},
+		{Name: "a", Value: "1"},
+	}
+	input.ProvenanceFingerprints = []Fingerprint{
+		{Name: "schema", Value: "sha256:schema"},
+		{Name: "prompt", Value: "sha256:prompt"},
+	}
+
+	identity := mustIdentity(t, input)
+
+	if got := strings.Join(identity.SelectedLanes, ","); got != "items,spells" {
+		t.Fatalf("selected lanes = %q, want sorted unique values", got)
+	}
+	if identity.RuntimeOverrides[0].Name != "a" || identity.ProvenanceFingerprints[0].Name != "prompt" {
+		t.Fatalf("fingerprints not sorted: runtime=%+v provenance=%+v", identity.RuntimeOverrides, identity.ProvenanceFingerprints)
+	}
+}
+
+func TestCheckpointIdentityPathIsFilesystemSafe(t *testing.T) {
+	input := identityInput()
+	input.Pipeline.ID = "campaign/main"
+	input.InputKey = "seriatim/input"
+	input.SourceDigest = "sha256:abcdef0123456789ffffffff"
+	input.Pipeline.Digest = "sha256:1234567890abcdefeeeeeeee"
+	identity := mustIdentity(t, input)
+
+	relative, err := identity.RelativePath()
+	if err != nil {
+		t.Fatalf("RelativePath: %v", err)
+	}
+	if strings.Contains(relative, `\`) || strings.Contains(relative, "..") {
+		t.Fatalf("relative path is not filesystem safe: %q", relative)
+	}
+	identityDigest := digestPrefix(identity.Digest)
+	wantRelative := "campaign~2fmain/seriatim~2finput-abcdef0123456789/1234567890abcdef/" + identityDigest
+	if relative != wantRelative {
+		t.Fatalf("relative path = %q", relative)
+	}
+
+	root := t.TempDir()
+	settings := Settings{
+		CheckpointsRoot: filepath.Join(root, "checkpoints"),
+		ResumeEnabled:   true,
+	}
+	got, err := settings.CheckpointDirectory(identity)
+	if err != nil {
+		t.Fatalf("CheckpointDirectory: %v", err)
+	}
+	want := filepath.Join(root, "checkpoints", "campaign~2fmain", "seriatim~2finput-abcdef0123456789", "1234567890abcdef", identityDigest)
+	if got != want {
+		t.Fatalf("checkpoint directory = %q, want %q", got, want)
+	}
+}
+
+func TestCheckpointIdentityPathIncludesInvocationIdentity(t *testing.T) {
+	base := mustIdentity(t, identityInput())
+	changedInput := identityInput()
+	changedInput.References[0].Digest = "sha256:reference-b"
+	changed := mustIdentity(t, changedInput)
+
+	if base.Digest == changed.Digest {
+		t.Fatalf("test setup produced same identity digest: %q", base.Digest)
+	}
+	basePath, err := base.RelativePath()
+	if err != nil {
+		t.Fatalf("base RelativePath: %v", err)
+	}
+	changedPath, err := changed.RelativePath()
+	if err != nil {
+		t.Fatalf("changed RelativePath: %v", err)
+	}
+	if basePath == changedPath {
+		t.Fatalf("relative path did not change with invocation identity: %q", basePath)
+	}
+}
+
+func TestCheckpointDirectoryDisabledReturnsEmptyPath(t *testing.T) {
+	settings := Settings{CheckpointsRoot: filepath.Join(t.TempDir(), "checkpoints")}
+	got, err := settings.CheckpointDirectory(mustIdentity(t, identityInput()))
+	if err != nil {
+		t.Fatalf("CheckpointDirectory: %v", err)
+	}
+	if got != "" {
+		t.Fatalf("CheckpointDirectory = %q, want empty path", got)
+	}
+}
+
+func TestNewCheckpointIdentityRequiresCoreInputs(t *testing.T) {
+	tests := []struct {
+		name   string
+		mutate func(CheckpointIdentityInput) CheckpointIdentityInput
+		want   string
+	}{
+		{
+			name: "pipeline id",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.Pipeline.ID = ""
+				return input
+			},
+			want: "pipeline id",
+		},
+		{
+			name: "pipeline digest",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.Pipeline.Digest = ""
+				return input
+			},
+			want: "pipeline digest",
+		},
+		{
+			name: "input key",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.InputKey = ""
+				input.Pipeline.Input.Module = ""
+				return input
+			},
+			want: "input key",
+		},
+		{
+			name: "input digest",
+			mutate: func(input CheckpointIdentityInput) CheckpointIdentityInput {
+				input.RawInputDigest = ""
+				input.SourceDigest = ""
+				return input
+			},
+			want: "raw input digest or source digest",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			_, err := NewCheckpointIdentity(tc.mutate(identityInput()))
+			if err == nil || !strings.Contains(err.Error(), tc.want) {
+				t.Fatalf("expected error containing %q, got %v", tc.want, err)
+			}
+		})
+	}
+}
+
+func identityInput() CheckpointIdentityInput {
+	return CheckpointIdentityInput{
+		Pipeline: pipeline.ResolvedPipeline{
+			ID:     "dnd-session",
+			Digest: "sha256:pipeline-a",
+			Input:  pipeline.Binding("seriatim"),
+			ArtifactLanes: []pipeline.ResolvedArtifactLane{
+				{ID: "spells"},
+				{ID: "items"},
+			},
+		},
+		InputKey:       "seriatim",
+		RawInputDigest: "sha256:raw-a",
+		SelectedLanes:  []string{"spells"},
+		RuntimeOverrides: []Fingerprint{
+			{Name: "llm_profile", Value: "fast"},
+		},
+		References: []artifacts.ReferenceProvenance{
+			{
+				Stage:     "extract",
+				LaneID:    "spells",
+				SlotName:  "party",
+				OriginURI: "file:///party.yml",
+				Digest:    "sha256:reference-a",
+			},
+		},
+		ProvenanceFingerprints: []Fingerprint{
+			{Name: "prompt:dnd.spells", Value: "sha256:prompt-a"},
+		},
+	}
+}
+
+func mustIdentity(t *testing.T, input CheckpointIdentityInput) CheckpointIdentity {
+	t.Helper()
+	identity, err := NewCheckpointIdentity(input)
+	if err != nil {
+		t.Fatalf("NewCheckpointIdentity: %v", err)
+	}
+	return identity
+}

internal/core/workspace/manifest.go

@@ -0,0 +1,85 @@
+package workspace
+
+import "time"
+
+const (
+	WorkspaceSchemaVersion   = "notarius.workspace.v2"
+	WorkspaceSchemaVersionV1 = "notarius.workspace.v1"
+)
+
+type StageName string
+
+const (
+	StageSource    StageName = "source"
+	StageChunk     StageName = "chunk"
+	StageExtract   StageName = "extract"
+	StageMerge     StageName = "merge"
+	StageNormalize StageName = "normalize"
+)
+
+type StageStatus string
+
+const (
+	StatusPending                 StageStatus = "pending"
+	StatusRunning                 StageStatus = "running"
+	StatusSucceeded               StageStatus = "succeeded"
+	StatusSucceededWithRejections StageStatus = "succeeded_with_rejections"
+	StatusFailed                  StageStatus = "failed"
+	StatusInvalidated             StageStatus = "invalidated"
+)
+
+type StageManifest struct {
+	WorkspaceSchemaVersion string             `json:"workspace_schema_version"`
+	Stage                  StageName          `json:"stage"`
+	LaneID                 string             `json:"lane_id,omitempty"`
+	ModuleKey              string             `json:"module_key,omitempty"`
+	DependencyFingerprints []Fingerprint      `json:"dependency_fingerprints,omitempty"`
+	Status                 StageStatus        `json:"status"`
+	OutputDigests          []Fingerprint      `json:"output_digests,omitempty"`
+	ValidationStatus       string             `json:"validation_status,omitempty"`
+	Rejections             []RejectionSummary `json:"rejections,omitempty"`
+	StartedAt              *time.Time         `json:"started_at,omitempty"`
+	CompletedAt            *time.Time         `json:"completed_at,omitempty"`
+	Metadata               map[string]string  `json:"metadata,omitempty"`
+}
+
+type RejectionSummary struct {
+	ValidatorName string `json:"validator_name,omitempty"`
+	ReasonCode    string `json:"reason_code,omitempty"`
+	Message       string `json:"message,omitempty"`
+	Count         int    `json:"count,omitempty"`
+}
+
+type SourceManifest struct {
+	StageManifest
+	SourceID string `json:"source_id,omitempty"`
+}
+
+type ChunkManifest struct {
+	StageManifest
+	ChunkCount int `json:"chunk_count,omitempty"`
+}
+
+type ExtractLaneManifest struct {
+	StageManifest
+	ChunkCount  int `json:"chunk_count,omitempty"`
+	OutputCount int `json:"output_count,omitempty"`
+}
+
+type MergeLaneManifest struct {
+	StageManifest
+	InputCount int `json:"input_count,omitempty"`
+}
+
+type NormalizeLaneManifest struct {
+	StageManifest
+	InputCount int `json:"input_count,omitempty"`
+}
+
+func NewStageManifest(stage StageName, status StageStatus) StageManifest {
+	return StageManifest{
+		WorkspaceSchemaVersion: WorkspaceSchemaVersion,
+		Stage:                  stage,
+		Status:                 status,
+	}
+}

internal/core/workspace/manifest_test.go

@@ -0,0 +1,149 @@
+package workspace
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+func TestStageManifestDefaults(t *testing.T) {
+	if WorkspaceSchemaVersion != "notarius.workspace.v2" {
+		t.Fatalf("current schema version = %q, want notarius.workspace.v2", WorkspaceSchemaVersion)
+	}
+	if WorkspaceSchemaVersionV1 != "notarius.workspace.v1" {
+		t.Fatalf("legacy schema version = %q, want notarius.workspace.v1", WorkspaceSchemaVersionV1)
+	}
+	manifest := NewStageManifest(StageExtract, StatusRunning)
+
+	if manifest.WorkspaceSchemaVersion != WorkspaceSchemaVersion {
+		t.Fatalf("schema version = %q, want %q", manifest.WorkspaceSchemaVersion, WorkspaceSchemaVersion)
+	}
+	if manifest.Stage != StageExtract {
+		t.Fatalf("stage = %q, want extract", manifest.Stage)
+	}
+	if manifest.Status != StatusRunning {
+		t.Fatalf("status = %q, want running", manifest.Status)
+	}
+}
+
+func TestManifestJSONRoundTrips(t *testing.T) {
+	started := time.Unix(100, 0).UTC()
+	completed := time.Unix(200, 0).UTC()
+
+	t.Run("source", func(t *testing.T) {
+		manifest := SourceManifest{
+			StageManifest: populatedManifest(StageSource, "", "seriatim", started, completed),
+			SourceID:      "source-1",
+		}
+		var got SourceManifest
+		roundTripManifest(t, manifest, &got)
+		if got.SourceID != manifest.SourceID || got.Stage != StageSource {
+			t.Fatalf("round trip source manifest = %+v", got)
+		}
+	})
+
+	t.Run("chunk", func(t *testing.T) {
+		manifest := ChunkManifest{
+			StageManifest: populatedManifest(StageChunk, "", "generic", started, completed),
+			ChunkCount:    3,
+		}
+		var got ChunkManifest
+		roundTripManifest(t, manifest, &got)
+		if got.ChunkCount != manifest.ChunkCount || got.Stage != StageChunk {
+			t.Fatalf("round trip chunk manifest = %+v", got)
+		}
+	})
+
+	t.Run("extract", func(t *testing.T) {
+		manifest := ExtractLaneManifest{
+			StageManifest: populatedManifest(StageExtract, "spells", "dnd/spells", started, completed),
+			ChunkCount:    3,
+			OutputCount:   2,
+		}
+		var got ExtractLaneManifest
+		roundTripManifest(t, manifest, &got)
+		if got.LaneID != "spells" || got.OutputCount != manifest.OutputCount || got.Stage != StageExtract {
+			t.Fatalf("round trip extract manifest = %+v", got)
+		}
+	})
+
+	t.Run("merge", func(t *testing.T) {
+		manifest := MergeLaneManifest{
+			StageManifest: populatedManifest(StageMerge, "spells", "appendorder", started, completed),
+			InputCount:    2,
+		}
+		var got MergeLaneManifest
+		roundTripManifest(t, manifest, &got)
+		if got.InputCount != manifest.InputCount || got.Stage != StageMerge {
+			t.Fatalf("round trip merge manifest = %+v", got)
+		}
+	})
+
+	t.Run("normalize", func(t *testing.T) {
+		manifest := NormalizeLaneManifest{
+			StageManifest: populatedManifest(StageNormalize, "spells", "noop", started, completed),
+			InputCount:    1,
+		}
+		var got NormalizeLaneManifest
+		roundTripManifest(t, manifest, &got)
+		if got.InputCount != manifest.InputCount || got.Stage != StageNormalize {
+			t.Fatalf("round trip normalize manifest = %+v", got)
+		}
+	})
+}
+
+func TestStatusValues(t *testing.T) {
+	values := []StageStatus{
+		StatusPending,
+		StatusRunning,
+		StatusSucceeded,
+		StatusSucceededWithRejections,
+		StatusFailed,
+		StatusInvalidated,
+	}
+	want := []string{
+		"pending",
+		"running",
+		"succeeded",
+		"succeeded_with_rejections",
+		"failed",
+		"invalidated",
+	}
+	for i, value := range values {
+		if string(value) != want[i] {
+			t.Fatalf("status[%d] = %q, want %q", i, value, want[i])
+		}
+	}
+}
+
+func populatedManifest(stage StageName, laneID string, moduleKey string, started time.Time, completed time.Time) StageManifest {
+	manifest := NewStageManifest(stage, StatusSucceededWithRejections)
+	manifest.LaneID = laneID
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = []Fingerprint{{Name: "source", Value: "sha256:source"}}
+	manifest.OutputDigests = []Fingerprint{{Name: "output", Value: "sha256:output"}}
+	manifest.ValidationStatus = "approved_with_warnings"
+	manifest.Rejections = []RejectionSummary{
+		{
+			ValidatorName: "shape",
+			ReasonCode:    "invalid_shape",
+			Message:       "invalid output shape",
+			Count:         1,
+		},
+	}
+	manifest.StartedAt = &started
+	manifest.CompletedAt = &completed
+	manifest.Metadata = map[string]string{"attempt": "1"}
+	return manifest
+}
+
+func roundTripManifest(t *testing.T, in any, out any) {
+	t.Helper()
+	data, err := json.Marshal(in)
+	if err != nil {
+		t.Fatalf("marshal manifest: %v", err)
+	}
+	if err := json.Unmarshal(data, out); err != nil {
+		t.Fatalf("unmarshal manifest: %v", err)
+	}
+}

internal/core/workspace/settings.go

@@ -0,0 +1,76 @@
+package workspace
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
+)
+
+type Settings struct {
+	RootDir            string
+	DiagnosticsRoot    string
+	CheckpointsRoot    string
+	DebugRoot          string
+	DiagnosticsEnabled bool
+	ResumeEnabled      bool
+	DebugEnabled       bool
+}
+
+func FromConfig(cfg config.Config) Settings {
+	root := cleanPath(cfg.Workspace.Directory)
+	settings := Settings{
+		RootDir:            root,
+		DiagnosticsEnabled: cfg.DiagnosticsEnabled(),
+	}
+	if settings.DiagnosticsEnabled {
+		settings.DiagnosticsRoot = cleanPath(cfg.Diagnostics.WorkDir)
+	}
+	if root == "" {
+		return settings
+	}
+
+	settings.CheckpointsRoot = filepath.Join(root, "checkpoints")
+	settings.DebugRoot = filepath.Join(root, "debug")
+	settings.ResumeEnabled = cfg.Workspace.Resume.Enabled
+	settings.DebugEnabled = cfg.Workspace.Debug.Enabled
+	return settings
+}
+
+func (s Settings) DiagnosticsRunDirectory(runID string) (string, error) {
+	if !s.DiagnosticsEnabled || strings.TrimSpace(s.DiagnosticsRoot) == "" {
+		return "", nil
+	}
+	return safeSingleDirectory(s.DiagnosticsRoot, runID, "diagnostics run ID")
+}
+
+func (s Settings) CheckpointIdentityDirectory(identity string) (string, error) {
+	if !s.ResumeEnabled || strings.TrimSpace(s.CheckpointsRoot) == "" {
+		return "", nil
+	}
+	return SafePath(s.CheckpointsRoot, identity)
+}
+
+func (s Settings) DebugRunDirectory(runID string) (string, error) {
+	if !s.DebugEnabled || strings.TrimSpace(s.DebugRoot) == "" {
+		return "", nil
+	}
+	return safeSingleDirectory(s.DebugRoot, runID, "debug run ID")
+}
+
+func cleanPath(path string) string {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return ""
+	}
+	return filepath.Clean(path)
+}
+
+func safeSingleDirectory(root string, name string, label string) (string, error) {
+	name = strings.TrimSpace(name)
+	if strings.Contains(name, "/") || strings.Contains(name, `\`) {
+		return "", fmt.Errorf("%s %q must be a single directory name", label, name)
+	}
+	return SafePath(root, name)
+}

internal/core/workspace/settings_test.go

@@ -0,0 +1,127 @@
+package workspace
+
+import (
+	"path/filepath"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
+)
+
+func TestFromConfigBuildsWorkspaceRoots(t *testing.T) {
+	cfg := config.Default()
+	cfg.Workspace.Directory = "/var/lib/notarius"
+	cfg.Workspace.Resume.Enabled = true
+	cfg.Workspace.Debug.Enabled = true
+	cfg.RecomputeEffectiveDiagnostics()
+
+	settings := FromConfig(cfg)
+
+	if settings.RootDir != "/var/lib/notarius" {
+		t.Fatalf("RootDir = %q, want /var/lib/notarius", settings.RootDir)
+	}
+	if settings.DiagnosticsRoot != "/var/lib/notarius/diagnostics" || !settings.DiagnosticsEnabled {
+		t.Fatalf("diagnostics settings = %+v, want workspace diagnostics root enabled", settings)
+	}
+	if settings.CheckpointsRoot != "/var/lib/notarius/checkpoints" || !settings.ResumeEnabled {
+		t.Fatalf("checkpoint settings = %+v, want workspace checkpoints root enabled", settings)
+	}
+	if settings.DebugRoot != "/var/lib/notarius/debug" || !settings.DebugEnabled {
+		t.Fatalf("debug settings = %+v, want workspace debug root enabled", settings)
+	}
+}
+
+func TestFromConfigKeepsLegacyDiagnosticsRootWithoutWorkspaceRoot(t *testing.T) {
+	cfg := config.Default()
+	cfg.Diagnostics.WorkDir = "/tmp/notarius-legacy"
+	cfg.Workspace.Resume.Enabled = true
+	cfg.Workspace.Debug.Enabled = true
+
+	settings := FromConfig(cfg)
+
+	if settings.RootDir != "" {
+		t.Fatalf("RootDir = %q, want empty", settings.RootDir)
+	}
+	if settings.DiagnosticsRoot != "/tmp/notarius-legacy" || !settings.DiagnosticsEnabled {
+		t.Fatalf("diagnostics settings = %+v, want legacy diagnostics root enabled", settings)
+	}
+	if settings.CheckpointsRoot != "" || settings.ResumeEnabled {
+		t.Fatalf("checkpoint settings = %+v, want disabled empty root", settings)
+	}
+	if settings.DebugRoot != "" || settings.DebugEnabled {
+		t.Fatalf("debug settings = %+v, want disabled empty root", settings)
+	}
+}
+
+func TestPathConstructors(t *testing.T) {
+	root := t.TempDir()
+	settings := Settings{
+		RootDir:            root,
+		DiagnosticsRoot:    filepath.Join(root, "diagnostics"),
+		CheckpointsRoot:    filepath.Join(root, "checkpoints"),
+		DebugRoot:          filepath.Join(root, "debug"),
+		DiagnosticsEnabled: true,
+		ResumeEnabled:      true,
+		DebugEnabled:       true,
+	}
+
+	diagnosticsDir, err := settings.DiagnosticsRunDirectory("run-123")
+	if err != nil {
+		t.Fatalf("DiagnosticsRunDirectory: %v", err)
+	}
+	if diagnosticsDir != filepath.Join(root, "diagnostics", "run-123") {
+		t.Fatalf("diagnostics dir = %q", diagnosticsDir)
+	}
+
+	checkpointDir, err := settings.CheckpointIdentityDirectory("pipeline/input-digest/pipeline-digest")
+	if err != nil {
+		t.Fatalf("CheckpointIdentityDirectory: %v", err)
+	}
+	if checkpointDir != filepath.Join(root, "checkpoints", "pipeline", "input-digest", "pipeline-digest") {
+		t.Fatalf("checkpoint dir = %q", checkpointDir)
+	}
+
+	debugDir, err := settings.DebugRunDirectory("run-456")
+	if err != nil {
+		t.Fatalf("DebugRunDirectory: %v", err)
+	}
+	if debugDir != filepath.Join(root, "debug", "run-456") {
+		t.Fatalf("debug dir = %q", debugDir)
+	}
+}
+
+func TestDisabledPathConstructorsReturnEmptyPaths(t *testing.T) {
+	settings := Settings{}
+
+	for name, call := range map[string]func() (string, error){
+		"diagnostics": func() (string, error) { return settings.DiagnosticsRunDirectory("run-1") },
+		"checkpoint":  func() (string, error) { return settings.CheckpointIdentityDirectory("identity") },
+		"debug":       func() (string, error) { return settings.DebugRunDirectory("run-1") },
+	} {
+		t.Run(name, func(t *testing.T) {
+			got, err := call()
+			if err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+			if got != "" {
+				t.Fatalf("path = %q, want empty", got)
+			}
+		})
+	}
+}
+
+func TestRunDirectoryConstructorsRejectNestedNames(t *testing.T) {
+	root := t.TempDir()
+	settings := Settings{
+		DiagnosticsRoot:    filepath.Join(root, "diagnostics"),
+		DebugRoot:          filepath.Join(root, "debug"),
+		DiagnosticsEnabled: true,
+		DebugEnabled:       true,
+	}
+
+	if got, err := settings.DiagnosticsRunDirectory("run-1/nested"); err == nil {
+		t.Fatalf("DiagnosticsRunDirectory returned %q, want error", got)
+	}
+	if got, err := settings.DebugRunDirectory("run-1/nested"); err == nil {
+		t.Fatalf("DebugRunDirectory returned %q, want error", got)
+	}
+}

internal/framework/checkpoint/loader.go

@@ -0,0 +1,301 @@
+package checkpoint
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	coreworkspace "gitea.maximumdirect.net/eric/notarius/internal/core/workspace"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+type WorkspaceLoader struct {
+	root           string
+	identityDigest string
+}
+
+func NewWorkspaceLoader(settings coreworkspace.Settings, identity coreworkspace.CheckpointIdentity) (pipeline.CheckpointLoader, error) {
+	root, err := settings.CheckpointDirectory(identity)
+	if err != nil {
+		return nil, err
+	}
+	if strings.TrimSpace(root) == "" {
+		return pipeline.NoopCheckpointLoader(), nil
+	}
+	return &WorkspaceLoader{root: root, identityDigest: identity.Digest}, nil
+}
+
+func (l *WorkspaceLoader) Enabled() bool {
+	return l != nil && strings.TrimSpace(l.root) != ""
+}
+
+func (l *WorkspaceLoader) Source(moduleKey string) (pipeline.SourceCheckpoint, pipeline.CheckpointDecision) {
+	var manifest coreworkspace.SourceManifest
+	if decision := l.readJSON("source/manifest.json", &manifest); !decision.Reused {
+		return pipeline.SourceCheckpoint{}, decision
+	}
+	if decision := l.validateManifest(manifest.StageManifest, coreworkspace.StageSource, "", moduleKey, coreworkspace.StatusSucceeded, nil); !decision.Reused {
+		return pipeline.SourceCheckpoint{}, decision
+	}
+	var payload sourceDocumentEnvelope
+	if decision := l.readJSON("source/source-document.json", &payload); !decision.Reused {
+		return pipeline.SourceCheckpoint{}, decision
+	}
+	doc := cloneSourceDocument(payload.Document)
+	if err := source.ValidateDocument(&doc); err != nil {
+		return pipeline.SourceCheckpoint{}, invalidDecision("source checkpoint document is invalid: %v", err)
+	}
+	if strings.TrimSpace(manifest.SourceID) != "" && manifest.SourceID != doc.ID {
+		return pipeline.SourceCheckpoint{}, invalidDecision("source checkpoint source id does not match payload")
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.OutputDigests), digestFingerprints("source_document", doc.Digest)) {
+		return pipeline.SourceCheckpoint{}, invalidDecision("source checkpoint output digest does not match payload")
+	}
+	return pipeline.SourceCheckpoint{Document: &doc}, reusedDecision()
+}
+
+func (l *WorkspaceLoader) Chunk(moduleKey string, sourceDigest string) (pipeline.ChunkCheckpoint, pipeline.CheckpointDecision) {
+	expectedDependencies := digestFingerprints("source_document", sourceDigest)
+	var manifest coreworkspace.ChunkManifest
+	if decision := l.readJSON("chunk/manifest.json", &manifest); !decision.Reused {
+		return pipeline.ChunkCheckpoint{}, decision
+	}
+	if decision := l.validateManifest(manifest.StageManifest, coreworkspace.StageChunk, "", moduleKey, coreworkspace.StatusSucceeded, expectedDependencies); !decision.Reused {
+		return pipeline.ChunkCheckpoint{}, decision
+	}
+	var payload chunksEnvelope
+	if decision := l.readJSON("chunk/chunks.json", &payload); !decision.Reused {
+		return pipeline.ChunkCheckpoint{}, decision
+	}
+	chunks, err := sourceChunksFromEnvelope(payload.Chunks)
+	if err != nil {
+		return pipeline.ChunkCheckpoint{}, invalidDecision("chunk checkpoint payload is invalid: %v", err)
+	}
+	if len(chunks) == 0 {
+		return pipeline.ChunkCheckpoint{}, invalidDecision("chunk checkpoint payload has no chunks")
+	}
+	outputDigests, err := chunkOutputDigests(chunks)
+	if err != nil {
+		return pipeline.ChunkCheckpoint{}, invalidDecision("chunk checkpoint output cannot be digested: %v", err)
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.OutputDigests), outputDigests) {
+		return pipeline.ChunkCheckpoint{}, invalidDecision("chunk checkpoint output digests do not match payload")
+	}
+	return pipeline.ChunkCheckpoint{Chunks: chunks, Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+}
+
+func (l *WorkspaceLoader) Extract(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint) (pipeline.ExtractCheckpoint, pipeline.CheckpointDecision) {
+	var manifest coreworkspace.ExtractLaneManifest
+	if d := l.readJSON(laneManifestPath("extract", laneID), &manifest); !d.Reused {
+		return pipeline.ExtractCheckpoint{}, d
+	}
+	if d := l.validateLaneManifest(manifest.StageManifest, coreworkspace.StageExtract, laneID, moduleKey, dependencies, coreworkspace.StatusSucceeded, coreworkspace.StatusSucceededWithRejections); !d.Reused {
+		return pipeline.ExtractCheckpoint{}, d
+	}
+	var payload artifactExtractEnvelope
+	if d := l.readJSON(lanePayloadPath("extract", laneID, "outputs.json"), &payload); !d.Reused {
+		return pipeline.ExtractCheckpoint{}, d
+	}
+	outputs, err := artifactCheckpointOutputs(payload.Outputs)
+	if err != nil {
+		return pipeline.ExtractCheckpoint{}, invalidDecision("extract artifact checkpoint payload is invalid: %v", err)
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(outputs)) {
+		return pipeline.ExtractCheckpoint{}, invalidDecision("extract artifact checkpoint output digests do not match payload")
+	}
+	return pipeline.ExtractCheckpoint{Outputs: outputs, Rejected: cloneRejectedOutputs(payload.Rejected), Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+}
+
+func (l *WorkspaceLoader) Merge(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint) (pipeline.MergeCheckpoint, pipeline.CheckpointDecision) {
+	var manifest coreworkspace.MergeLaneManifest
+	if d := l.readJSON(laneManifestPath("merge", laneID), &manifest); !d.Reused {
+		return pipeline.MergeCheckpoint{}, d
+	}
+	if d := l.validateLaneManifest(manifest.StageManifest, coreworkspace.StageMerge, laneID, moduleKey, dependencies, coreworkspace.StatusSucceeded); !d.Reused {
+		return pipeline.MergeCheckpoint{}, d
+	}
+	var payload artifactSingleEnvelope
+	if d := l.readJSON(lanePayloadPath("merge", laneID, "output.json"), &payload); !d.Reused {
+		return pipeline.MergeCheckpoint{}, d
+	}
+	values, err := artifactCheckpointOutputs([]artifactCheckpointEnvelope{payload.Output})
+	if err != nil {
+		return pipeline.MergeCheckpoint{}, invalidDecision("merge artifact checkpoint payload is invalid: %v", err)
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(values)) {
+		return pipeline.MergeCheckpoint{}, invalidDecision("merge artifact checkpoint output digest does not match payload")
+	}
+	return pipeline.MergeCheckpoint{Output: values[0], Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+}
+
+func (l *WorkspaceLoader) Normalize(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint) (pipeline.NormalizeCheckpoint, pipeline.CheckpointDecision) {
+	var manifest coreworkspace.NormalizeLaneManifest
+	if d := l.readJSON(laneManifestPath("normalize", laneID), &manifest); !d.Reused {
+		return pipeline.NormalizeCheckpoint{}, d
+	}
+	if d := l.validateLaneManifest(manifest.StageManifest, coreworkspace.StageNormalize, laneID, moduleKey, dependencies, coreworkspace.StatusSucceeded); !d.Reused {
+		return pipeline.NormalizeCheckpoint{}, d
+	}
+	var payload artifactSingleEnvelope
+	if d := l.readJSON(lanePayloadPath("normalize", laneID, "output.json"), &payload); !d.Reused {
+		return pipeline.NormalizeCheckpoint{}, d
+	}
+	values, err := artifactCheckpointOutputs([]artifactCheckpointEnvelope{payload.Output})
+	if err != nil {
+		return pipeline.NormalizeCheckpoint{}, invalidDecision("normalize artifact checkpoint payload is invalid: %v", err)
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.OutputDigests), artifactOutputDigests(values)) {
+		return pipeline.NormalizeCheckpoint{}, invalidDecision("normalize artifact checkpoint output digest does not match payload")
+	}
+	return pipeline.NormalizeCheckpoint{Output: values[0], Warnings: cloneWarnings(payload.Warnings)}, reusedDecision()
+}
+
+func artifactCheckpointOutputs(values []artifactCheckpointEnvelope) ([]pipeline.CheckpointArtifact, error) {
+	if len(values) == 0 {
+		return nil, nil
+	}
+	out := make([]pipeline.CheckpointArtifact, 0, len(values))
+	for _, v := range values {
+		content, err := contentFromEnvelope(v.Content)
+		if err != nil {
+			return nil, err
+		}
+		if strings.TrimSpace(string(v.Kind)) == "" || strings.TrimSpace(v.Schema.ID) == "" || strings.TrimSpace(v.Schema.Version) == "" || strings.TrimSpace(v.SchemaDigest) == "" {
+			return nil, fmt.Errorf("artifact codec identity is incomplete")
+		}
+		out = append(out, pipeline.CheckpointArtifact{LaneID: v.LaneID, ModuleKey: v.ModuleKey, SourceID: v.SourceID, ChunkID: v.ChunkID, ChunkIndex: v.ChunkIndex, ChunkRef: v.ChunkRef, SchemaDigest: v.SchemaDigest, Artifact: contracts.SerializedArtifact{Kind: v.Kind, Schema: v.Schema, MediaType: v.Content.MediaType, Content: content, Metadata: cloneMetadata(v.Content.Metadata)}})
+	}
+	return out, nil
+}
+
+func (l *WorkspaceLoader) readJSON(name string, out any) pipeline.CheckpointDecision {
+	if !l.Enabled() {
+		return pipeline.CheckpointDecision{Reason: "checkpoint loading disabled"}
+	}
+	target, err := coreworkspace.SafePath(l.root, name)
+	if err != nil {
+		return invalidDecision("checkpoint path is invalid: %v", err)
+	}
+	data, err := os.ReadFile(target)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return pipeline.CheckpointDecision{Reason: "checkpoint artifact is missing"}
+		}
+		return invalidDecision("read checkpoint artifact: %v", err)
+	}
+	if err := json.Unmarshal(data, out); err != nil {
+		return invalidDecision("decode checkpoint artifact: %v", err)
+	}
+	return reusedDecision()
+}
+
+func (l *WorkspaceLoader) validateManifest(manifest coreworkspace.StageManifest, stage coreworkspace.StageName, laneID string, moduleKey string, status coreworkspace.StageStatus, dependencies []pipeline.CheckpointFingerprint) pipeline.CheckpointDecision {
+	return l.validateLaneManifest(manifest, stage, laneID, moduleKey, dependencies, status)
+}
+
+func (l *WorkspaceLoader) validateLaneManifest(manifest coreworkspace.StageManifest, stage coreworkspace.StageName, laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, statuses ...coreworkspace.StageStatus) pipeline.CheckpointDecision {
+	if manifest.WorkspaceSchemaVersion == coreworkspace.WorkspaceSchemaVersionV1 {
+		return invalidDecision("checkpoint workspace schema version %q is incompatible with %q and must be recomputed", manifest.WorkspaceSchemaVersion, coreworkspace.WorkspaceSchemaVersion)
+	}
+	if manifest.WorkspaceSchemaVersion != coreworkspace.WorkspaceSchemaVersion {
+		return invalidDecision("checkpoint workspace schema version %q is not supported", manifest.WorkspaceSchemaVersion)
+	}
+	if strings.TrimSpace(l.identityDigest) != "" && manifest.Metadata["checkpoint_identity_digest"] != l.identityDigest {
+		return invalidDecision("checkpoint identity digest does not match current invocation")
+	}
+	if manifest.Stage != stage {
+		return invalidDecision("checkpoint stage %q does not match %q", manifest.Stage, stage)
+	}
+	if strings.TrimSpace(laneID) != "" && manifest.LaneID != laneID {
+		return invalidDecision("checkpoint lane %q does not match %q", manifest.LaneID, laneID)
+	}
+	if strings.TrimSpace(moduleKey) != "" && manifest.ModuleKey != moduleKey {
+		return invalidDecision("checkpoint module %q does not match %q", manifest.ModuleKey, moduleKey)
+	}
+	statusOK := false
+	for _, status := range statuses {
+		if manifest.Status == status {
+			statusOK = true
+			break
+		}
+	}
+	if !statusOK {
+		return invalidDecision("checkpoint status %q cannot be reused", manifest.Status)
+	}
+	if !fingerprintsEqual(coreworkspaceToPipelineFingerprints(manifest.DependencyFingerprints), dependencies) {
+		return invalidDecision("checkpoint dependency fingerprints do not match")
+	}
+	return reusedDecision()
+}
+
+func sourceChunksFromEnvelope(values []chunkEnvelope) ([]source.Chunk, error) {
+	if len(values) == 0 {
+		return nil, nil
+	}
+	out := make([]source.Chunk, 0, len(values))
+	for _, value := range values {
+		content, err := contentFromEnvelope(value.Content)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, source.Chunk{
+			ID:        value.ID,
+			SourceID:  value.SourceID,
+			Index:     value.Index,
+			Ref:       value.Ref,
+			Content:   content,
+			MediaType: value.Content.MediaType,
+			Units:     cloneSourceUnits(value.Units),
+			Metadata:  cloneMetadata(value.Metadata),
+		})
+	}
+	return out, nil
+}
+
+func contentFromEnvelope(value binaryEnvelope) ([]byte, error) {
+	content, err := base64.StdEncoding.DecodeString(value.ContentBase64)
+	if err != nil {
+		return nil, fmt.Errorf("decode content_base64: %w", err)
+	}
+	if digest := strings.TrimSpace(value.ContentDigest); digest != "" && digest != contentDigest(content) {
+		return nil, fmt.Errorf("content digest mismatch")
+	}
+	return content, nil
+}
+
+func coreworkspaceToPipelineFingerprints(values []coreworkspace.Fingerprint) []pipeline.CheckpointFingerprint {
+	if len(values) == 0 {
+		return nil
+	}
+	out := make([]pipeline.CheckpointFingerprint, 0, len(values))
+	for _, value := range values {
+		out = append(out, pipeline.CheckpointFingerprint{Name: value.Name, Value: value.Value})
+	}
+	return normalizeFingerprints(out)
+}
+
+func fingerprintsEqual(a []pipeline.CheckpointFingerprint, b []pipeline.CheckpointFingerprint) bool {
+	a = normalizeFingerprints(a)
+	b = normalizeFingerprints(b)
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func reusedDecision() pipeline.CheckpointDecision {
+	return pipeline.CheckpointDecision{Reused: true, Reason: "checkpoint is valid"}
+}
+
+func invalidDecision(format string, args ...any) pipeline.CheckpointDecision {
+	return pipeline.CheckpointDecision{Reason: fmt.Sprintf(format, args...)}
+}

internal/framework/checkpoint/recorder.go

@@ -0,0 +1,561 @@
+package checkpoint
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+	"path"
+	"sort"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	coreworkspace "gitea.maximumdirect.net/eric/notarius/internal/core/workspace"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+type WorkspaceRecorder struct {
+	root           string
+	identityDigest string
+	now            func() time.Time
+}
+
+func NewWorkspaceRecorder(settings coreworkspace.Settings, identity coreworkspace.CheckpointIdentity) (pipeline.CheckpointRecorder, error) {
+	root, err := settings.CheckpointDirectory(identity)
+	if err != nil {
+		return nil, err
+	}
+	if strings.TrimSpace(root) == "" {
+		return pipeline.NoopCheckpointRecorder(), nil
+	}
+	return &WorkspaceRecorder{root: root, identityDigest: identity.Digest, now: time.Now}, nil
+}
+
+func (r *WorkspaceRecorder) SourceRunning(moduleKey string) error {
+	manifest := r.newStageManifest(coreworkspace.StageSource, coreworkspace.StatusRunning)
+	manifest.ModuleKey = moduleKey
+	manifest.StartedAt = timePtr(r.timestamp())
+	return r.writeManifest("source/manifest.json", coreworkspace.SourceManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) SourceSucceeded(moduleKey string, doc *source.SourceDocument) error {
+	if doc == nil {
+		return fmt.Errorf("checkpoint source document must not be nil")
+	}
+	if err := r.writePayload("source/source-document.json", sourceDocumentEnvelope{Document: cloneSourceDocument(*doc)}); err != nil {
+		return err
+	}
+	manifest := r.newStageManifest(coreworkspace.StageSource, coreworkspace.StatusSucceeded)
+	manifest.ModuleKey = moduleKey
+	manifest.OutputDigests = workspaceFingerprints(digestFingerprints("source_document", doc.Digest))
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest("source/manifest.json", coreworkspace.SourceManifest{
+		StageManifest: manifest,
+		SourceID:      doc.ID,
+	})
+}
+
+func (r *WorkspaceRecorder) SourceFailed(moduleKey string, err error) error {
+	manifest := r.newStageManifest(coreworkspace.StageSource, coreworkspace.StatusFailed)
+	manifest.ModuleKey = moduleKey
+	manifest.CompletedAt = timePtr(r.timestamp())
+	manifest.Metadata = errorMetadata(err)
+	return r.writeManifest("source/manifest.json", coreworkspace.SourceManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) ChunkRunning(moduleKey string, sourceDigest string) error {
+	manifest := r.newStageManifest(coreworkspace.StageChunk, coreworkspace.StatusRunning)
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = workspaceFingerprints(digestFingerprints("source_document", sourceDigest))
+	manifest.StartedAt = timePtr(r.timestamp())
+	return r.writeManifest("chunk/manifest.json", coreworkspace.ChunkManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) ChunkSucceeded(moduleKey string, sourceDigest string, chunks []source.Chunk, warnings []contracts.Warning) error {
+	outputDigests, err := chunkOutputDigests(chunks)
+	if err != nil {
+		return fmt.Errorf("digest chunk checkpoint output: %w", err)
+	}
+	payload := chunksEnvelope{Chunks: chunkEnvelopes(chunks), Warnings: cloneWarnings(warnings)}
+	if err := r.writePayload("chunk/chunks.json", payload); err != nil {
+		return err
+	}
+	manifest := r.newStageManifest(coreworkspace.StageChunk, coreworkspace.StatusSucceeded)
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = workspaceFingerprints(digestFingerprints("source_document", sourceDigest))
+	manifest.OutputDigests = workspaceFingerprints(outputDigests)
+	manifest.ValidationStatus = validationStatusString(warnings, nil)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest("chunk/manifest.json", coreworkspace.ChunkManifest{
+		StageManifest: manifest,
+		ChunkCount:    len(chunks),
+	})
+}
+
+func (r *WorkspaceRecorder) ChunkRejected(moduleKey string, sourceDigest string, rejected contracts.RejectedOutput) error {
+	manifest := r.newStageManifest(coreworkspace.StageChunk, coreworkspace.StatusSucceededWithRejections)
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = workspaceFingerprints(digestFingerprints("source_document", sourceDigest))
+	manifest.ValidationStatus = "rejected"
+	manifest.Rejections = rejectionSummaries([]contracts.RejectedOutput{rejected})
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest("chunk/manifest.json", coreworkspace.ChunkManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) ChunkFailed(moduleKey string, sourceDigest string, err error) error {
+	manifest := r.newStageManifest(coreworkspace.StageChunk, coreworkspace.StatusFailed)
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = workspaceFingerprints(digestFingerprints("source_document", sourceDigest))
+	manifest.CompletedAt = timePtr(r.timestamp())
+	manifest.Metadata = errorMetadata(err)
+	return r.writeManifest("chunk/manifest.json", coreworkspace.ChunkManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) ExtractRunning(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint) error {
+	manifest := r.laneManifest(coreworkspace.StageExtract, coreworkspace.StatusRunning, laneID, moduleKey, dependencies)
+	manifest.StartedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("extract", laneID), coreworkspace.ExtractLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) ExtractSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, outputs []pipeline.CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error {
+	payload := artifactExtractEnvelope{Outputs: artifactCheckpointEnvelopes(outputs), Rejected: cloneRejectedOutputs(rejected), Warnings: cloneWarnings(warnings)}
+	if err := r.writePayload(lanePayloadPath("extract", laneID, "outputs.json"), payload); err != nil {
+		return err
+	}
+	manifest := r.laneManifest(coreworkspace.StageExtract, statusForRejected(rejected), laneID, moduleKey, dependencies)
+	manifest.OutputDigests = workspaceFingerprints(artifactOutputDigests(outputs))
+	manifest.ValidationStatus = validationStatusString(warnings, rejected)
+	manifest.Rejections = rejectionSummaries(rejected)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("extract", laneID), coreworkspace.ExtractLaneManifest{StageManifest: manifest, ChunkCount: len(outputs) + len(rejected), OutputCount: len(outputs)})
+}
+
+func (r *WorkspaceRecorder) ExtractFailed(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, err error) error {
+	manifest := r.laneManifest(coreworkspace.StageExtract, coreworkspace.StatusFailed, laneID, moduleKey, dependencies)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	manifest.Metadata = errorMetadata(err)
+	return r.writeManifest(laneManifestPath("extract", laneID), coreworkspace.ExtractLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) MergeRunning(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint) error {
+	manifest := r.laneManifest(coreworkspace.StageMerge, coreworkspace.StatusRunning, laneID, moduleKey, dependencies)
+	manifest.StartedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("merge", laneID), coreworkspace.MergeLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) MergeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+	if err := r.writePayload(lanePayloadPath("merge", laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output), Warnings: cloneWarnings(warnings)}); err != nil {
+		return err
+	}
+	manifest := r.laneManifest(coreworkspace.StageMerge, coreworkspace.StatusSucceeded, laneID, moduleKey, dependencies)
+	manifest.OutputDigests = workspaceFingerprints(artifactOutputDigests([]pipeline.CheckpointArtifact{output}))
+	manifest.ValidationStatus = validationStatusString(warnings, nil)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("merge", laneID), coreworkspace.MergeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
+}
+
+func (r *WorkspaceRecorder) MergeRejected(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, rejected contracts.RejectedOutput) error {
+	manifest := r.laneManifest(coreworkspace.StageMerge, coreworkspace.StatusSucceededWithRejections, laneID, moduleKey, dependencies)
+	manifest.ValidationStatus = "rejected"
+	manifest.Rejections = rejectionSummaries([]contracts.RejectedOutput{rejected})
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("merge", laneID), coreworkspace.MergeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
+}
+
+func (r *WorkspaceRecorder) MergeFailed(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, err error) error {
+	manifest := r.laneManifest(coreworkspace.StageMerge, coreworkspace.StatusFailed, laneID, moduleKey, dependencies)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	manifest.Metadata = errorMetadata(err)
+	return r.writeManifest(laneManifestPath("merge", laneID), coreworkspace.MergeLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) NormalizeRunning(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint) error {
+	manifest := r.laneManifest(coreworkspace.StageNormalize, coreworkspace.StatusRunning, laneID, moduleKey, dependencies)
+	manifest.StartedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("normalize", laneID), coreworkspace.NormalizeLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) NormalizeSucceeded(laneID, moduleKey string, dependencies []pipeline.CheckpointFingerprint, output pipeline.CheckpointArtifact, warnings []contracts.Warning) error {
+	if err := r.writePayload(lanePayloadPath("normalize", laneID, "output.json"), artifactSingleEnvelope{Output: artifactCheckpointEnvelopeFromOutput(output), Warnings: cloneWarnings(warnings)}); err != nil {
+		return err
+	}
+	manifest := r.laneManifest(coreworkspace.StageNormalize, coreworkspace.StatusSucceeded, laneID, moduleKey, dependencies)
+	manifest.OutputDigests = workspaceFingerprints(artifactOutputDigests([]pipeline.CheckpointArtifact{output}))
+	manifest.ValidationStatus = validationStatusString(warnings, nil)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("normalize", laneID), coreworkspace.NormalizeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
+}
+
+func (r *WorkspaceRecorder) NormalizeRejected(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, rejected contracts.RejectedOutput) error {
+	manifest := r.laneManifest(coreworkspace.StageNormalize, coreworkspace.StatusSucceededWithRejections, laneID, moduleKey, dependencies)
+	manifest.ValidationStatus = "rejected"
+	manifest.Rejections = rejectionSummaries([]contracts.RejectedOutput{rejected})
+	manifest.CompletedAt = timePtr(r.timestamp())
+	return r.writeManifest(laneManifestPath("normalize", laneID), coreworkspace.NormalizeLaneManifest{StageManifest: manifest, InputCount: len(dependencies)})
+}
+
+func (r *WorkspaceRecorder) NormalizeFailed(laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint, err error) error {
+	manifest := r.laneManifest(coreworkspace.StageNormalize, coreworkspace.StatusFailed, laneID, moduleKey, dependencies)
+	manifest.CompletedAt = timePtr(r.timestamp())
+	manifest.Metadata = errorMetadata(err)
+	return r.writeManifest(laneManifestPath("normalize", laneID), coreworkspace.NormalizeLaneManifest{StageManifest: manifest})
+}
+
+func (r *WorkspaceRecorder) writeManifest(name string, payload any) error {
+	return r.writeJSON(name, payload)
+}
+
+func (r *WorkspaceRecorder) writePayload(name string, payload any) error {
+	return r.writeJSON(name, payload)
+}
+
+func (r *WorkspaceRecorder) writeJSON(name string, payload any) error {
+	if r == nil || strings.TrimSpace(r.root) == "" {
+		return nil
+	}
+	return coreworkspace.WriteJSON(r.root, name, payload)
+}
+
+func (r *WorkspaceRecorder) timestamp() time.Time {
+	if r == nil || r.now == nil {
+		return time.Now().UTC()
+	}
+	return r.now().UTC()
+}
+
+func (r *WorkspaceRecorder) newStageManifest(stage coreworkspace.StageName, status coreworkspace.StageStatus) coreworkspace.StageManifest {
+	manifest := coreworkspace.NewStageManifest(stage, status)
+	if strings.TrimSpace(r.identityDigest) != "" {
+		manifest.Metadata = map[string]string{"checkpoint_identity_digest": r.identityDigest}
+	}
+	return manifest
+}
+
+func (r *WorkspaceRecorder) laneManifest(stage coreworkspace.StageName, status coreworkspace.StageStatus, laneID string, moduleKey string, dependencies []pipeline.CheckpointFingerprint) coreworkspace.StageManifest {
+	manifest := r.newStageManifest(stage, status)
+	manifest.LaneID = laneID
+	manifest.ModuleKey = moduleKey
+	manifest.DependencyFingerprints = workspaceFingerprints(dependencies)
+	return manifest
+}
+
+type sourceDocumentEnvelope struct {
+	Document source.SourceDocument `json:"document"`
+}
+
+type chunksEnvelope struct {
+	Chunks   []chunkEnvelope     `json:"chunks"`
+	Warnings []contracts.Warning `json:"warnings,omitempty"`
+}
+
+type chunkEnvelope struct {
+	ID       string              `json:"id"`
+	SourceID string              `json:"source_id"`
+	Index    int                 `json:"index"`
+	Ref      source.SourceRef    `json:"ref"`
+	Content  binaryEnvelope      `json:"content"`
+	Units    []source.SourceUnit `json:"units,omitempty"`
+	Metadata map[string]any      `json:"metadata,omitempty"`
+}
+
+type binaryEnvelope struct {
+	ContentBase64 string              `json:"content_base64,omitempty"`
+	ContentDigest string              `json:"content_digest,omitempty"`
+	MediaType     string              `json:"media_type,omitempty"`
+	Metadata      map[string]any      `json:"metadata,omitempty"`
+	Warnings      []contracts.Warning `json:"warnings,omitempty"`
+}
+
+type artifactCheckpointEnvelope struct {
+	LaneID       string                   `json:"lane_id"`
+	ModuleKey    string                   `json:"module_key"`
+	SourceID     string                   `json:"source_id,omitempty"`
+	ChunkID      string                   `json:"chunk_id,omitempty"`
+	ChunkIndex   int                      `json:"chunk_index,omitempty"`
+	ChunkRef     source.SourceRef         `json:"chunk_ref,omitempty"`
+	Kind         contracts.ArtifactKind   `json:"artifact_kind"`
+	Schema       contracts.ArtifactSchema `json:"schema"`
+	SchemaDigest string                   `json:"schema_digest"`
+	Content      binaryEnvelope           `json:"content"`
+}
+type artifactExtractEnvelope struct {
+	Outputs  []artifactCheckpointEnvelope `json:"outputs"`
+	Rejected []contracts.RejectedOutput   `json:"rejected,omitempty"`
+	Warnings []contracts.Warning          `json:"warnings,omitempty"`
+}
+type artifactSingleEnvelope struct {
+	Output   artifactCheckpointEnvelope `json:"output"`
+	Warnings []contracts.Warning        `json:"warnings,omitempty"`
+}
+
+func artifactCheckpointEnvelopeFromOutput(output pipeline.CheckpointArtifact) artifactCheckpointEnvelope {
+	schema := contracts.CloneArtifactSchema(output.Artifact.Schema)
+	schema.JSONSchema = nil
+	return artifactCheckpointEnvelope{LaneID: output.LaneID, ModuleKey: output.ModuleKey, SourceID: output.SourceID, ChunkID: output.ChunkID, ChunkIndex: output.ChunkIndex, ChunkRef: output.ChunkRef, Kind: output.Artifact.Kind, Schema: schema, SchemaDigest: output.SchemaDigest, Content: binaryEnvelopeFromContent(output.Artifact.Content, output.Artifact.MediaType, output.Artifact.Metadata, nil)}
+}
+func artifactCheckpointEnvelopes(outputs []pipeline.CheckpointArtifact) []artifactCheckpointEnvelope {
+	if len(outputs) == 0 {
+		return nil
+	}
+	out := make([]artifactCheckpointEnvelope, 0, len(outputs))
+	for _, v := range outputs {
+		out = append(out, artifactCheckpointEnvelopeFromOutput(v))
+	}
+	return out
+}
+func artifactOutputDigests(outputs []pipeline.CheckpointArtifact) []pipeline.CheckpointFingerprint {
+	values := make([]pipeline.CheckpointFingerprint, 0, len(outputs))
+	for i, v := range outputs {
+		values = append(values, pipeline.CheckpointFingerprint{Name: fmt.Sprintf("artifact[%d]", i), Value: contentDigest(v.Artifact.Content)})
+	}
+	return normalizeFingerprints(values)
+}
+
+func chunkEnvelopes(chunks []source.Chunk) []chunkEnvelope {
+	if len(chunks) == 0 {
+		return nil
+	}
+	out := make([]chunkEnvelope, 0, len(chunks))
+	for _, chunk := range chunks {
+		out = append(out, chunkEnvelope{
+			ID:       chunk.ID,
+			SourceID: chunk.SourceID,
+			Index:    chunk.Index,
+			Ref:      chunk.Ref,
+			Content:  binaryEnvelopeFromContent(chunk.Content, chunk.MediaType, chunk.Metadata, nil),
+			Units:    cloneSourceUnits(chunk.Units),
+			Metadata: cloneMetadata(chunk.Metadata),
+		})
+	}
+	return out
+}
+
+func binaryEnvelopeFromContent(content []byte, mediaType string, metadata map[string]any, warnings []contracts.Warning) binaryEnvelope {
+	return binaryEnvelope{
+		ContentBase64: base64.StdEncoding.EncodeToString(content),
+		ContentDigest: contentDigest(content),
+		MediaType:     mediaType,
+		Metadata:      cloneMetadata(metadata),
+		Warnings:      cloneWarnings(warnings),
+	}
+}
+
+func cloneSourceDocument(doc source.SourceDocument) source.SourceDocument {
+	doc.Units = cloneSourceUnits(doc.Units)
+	doc.Metadata = cloneMetadata(doc.Metadata)
+	return doc
+}
+
+func cloneSourceUnits(units []source.SourceUnit) []source.SourceUnit {
+	if len(units) == 0 {
+		return nil
+	}
+	out := make([]source.SourceUnit, 0, len(units))
+	for _, unit := range units {
+		out = append(out, source.SourceUnit{
+			ID:       unit.ID,
+			Kind:     unit.Kind,
+			Text:     unit.Text,
+			Ref:      unit.Ref,
+			Metadata: cloneMetadata(unit.Metadata),
+		})
+	}
+	return out
+}
+
+func cloneWarnings(warnings []contracts.Warning) []contracts.Warning {
+	if len(warnings) == 0 {
+		return nil
+	}
+	return append([]contracts.Warning(nil), warnings...)
+}
+
+func cloneRejectedOutputs(rejected []contracts.RejectedOutput) []contracts.RejectedOutput {
+	if len(rejected) == 0 {
+		return nil
+	}
+	return append([]contracts.RejectedOutput(nil), rejected...)
+}
+
+func cloneMetadata(metadata map[string]any) map[string]any {
+	if len(metadata) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(metadata))
+	for key, value := range metadata {
+		out[key] = value
+	}
+	return out
+}
+
+func chunkOutputDigests(chunks []source.Chunk) ([]pipeline.CheckpointFingerprint, error) {
+	values := make([]pipeline.CheckpointFingerprint, 0, len(chunks))
+	for _, chunk := range chunks {
+		digest, err := source.DigestChunk(chunk)
+		if err != nil {
+			return nil, fmt.Errorf("chunk %q: %w", chunk.ID, err)
+		}
+		values = append(values, pipeline.CheckpointFingerprint{
+			Name:  chunk.ID,
+			Value: digest,
+		})
+	}
+	return normalizeFingerprints(values), nil
+}
+
+func digestFingerprints(name string, digest string) []pipeline.CheckpointFingerprint {
+	digest = strings.TrimSpace(digest)
+	if digest == "" {
+		return nil
+	}
+	return []pipeline.CheckpointFingerprint{{Name: name, Value: digest}}
+}
+
+func workspaceFingerprints(values []pipeline.CheckpointFingerprint) []coreworkspace.Fingerprint {
+	normalized := normalizeFingerprints(values)
+	if len(normalized) == 0 {
+		return nil
+	}
+	out := make([]coreworkspace.Fingerprint, 0, len(normalized))
+	for _, value := range normalized {
+		out = append(out, coreworkspace.Fingerprint{Name: value.Name, Value: value.Value})
+	}
+	return out
+}
+
+func normalizeFingerprints(values []pipeline.CheckpointFingerprint) []pipeline.CheckpointFingerprint {
+	if len(values) == 0 {
+		return nil
+	}
+	byName := make(map[string]string, len(values))
+	for _, value := range values {
+		name := strings.TrimSpace(value.Name)
+		fingerprint := strings.TrimSpace(value.Value)
+		if name == "" || fingerprint == "" {
+			continue
+		}
+		byName[name] = fingerprint
+	}
+	if len(byName) == 0 {
+		return nil
+	}
+	names := make([]string, 0, len(byName))
+	for name := range byName {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	out := make([]pipeline.CheckpointFingerprint, 0, len(names))
+	for _, name := range names {
+		out = append(out, pipeline.CheckpointFingerprint{Name: name, Value: byName[name]})
+	}
+	return out
+}
+
+func rejectionSummaries(rejected []contracts.RejectedOutput) []coreworkspace.RejectionSummary {
+	if len(rejected) == 0 {
+		return nil
+	}
+	type key struct {
+		validatorName string
+		reasonCode    string
+		message       string
+	}
+	counts := make(map[key]int, len(rejected))
+	for _, item := range rejected {
+		k := key{validatorName: item.ValidatorName, reasonCode: item.ReasonCode, message: item.Message}
+		counts[k]++
+	}
+	keys := make([]key, 0, len(counts))
+	for k := range counts {
+		keys = append(keys, k)
+	}
+	sort.Slice(keys, func(i, j int) bool {
+		if keys[i].validatorName != keys[j].validatorName {
+			return keys[i].validatorName < keys[j].validatorName
+		}
+		if keys[i].reasonCode != keys[j].reasonCode {
+			return keys[i].reasonCode < keys[j].reasonCode
+		}
+		return keys[i].message < keys[j].message
+	})
+	out := make([]coreworkspace.RejectionSummary, 0, len(keys))
+	for _, k := range keys {
+		out = append(out, coreworkspace.RejectionSummary{
+			ValidatorName: k.validatorName,
+			ReasonCode:    k.reasonCode,
+			Message:       k.message,
+			Count:         counts[k],
+		})
+	}
+	return out
+}
+
+func statusForRejected(rejected []contracts.RejectedOutput) coreworkspace.StageStatus {
+	if len(rejected) > 0 {
+		return coreworkspace.StatusSucceededWithRejections
+	}
+	return coreworkspace.StatusSucceeded
+}
+
+func validationStatusString(warnings []contracts.Warning, rejected []contracts.RejectedOutput) string {
+	if len(rejected) > 0 {
+		return "rejected"
+	}
+	if len(warnings) > 0 {
+		return "approved_with_warnings"
+	}
+	return "approved"
+}
+
+func errorMetadata(err error) map[string]string {
+	if err == nil {
+		return nil
+	}
+	return map[string]string{"error": err.Error()}
+}
+
+func laneManifestPath(stage string, laneID string) string {
+	return lanePayloadPath(stage, laneID, "manifest.json")
+}
+
+func lanePayloadPath(stage string, laneID string, file string) string {
+	return path.Join(stage, checkpointPathComponent(laneID), file)
+}
+
+func checkpointPathComponent(value string) string {
+	value = strings.TrimSpace(value)
+	if value == "" {
+		return "_"
+	}
+	var b strings.Builder
+	for _, r := range value {
+		switch {
+		case r >= 'a' && r <= 'z':
+			b.WriteRune(r)
+		case r >= 'A' && r <= 'Z':
+			b.WriteRune(r)
+		case r >= '0' && r <= '9':
+			b.WriteRune(r)
+		case r == '-' || r == '_' || r == '.':
+			b.WriteRune(r)
+		default:
+			b.WriteString(fmt.Sprintf("~%x", r))
+		}
+	}
+	out := b.String()
+	if out == "." || out == ".." || strings.Contains(out, "..") {
+		return "_"
+	}
+	return out
+}
+
+func contentDigest(content []byte) string {
+	sum := sha256.Sum256(content)
+	return "sha256:" + hex.EncodeToString(sum[:])
+}
+
+func timePtr(t time.Time) *time.Time {
+	return &t
+}

internal/framework/checkpoint/recorder_test.go

@@ -0,0 +1,318 @@
+package checkpoint
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	coreworkspace "gitea.maximumdirect.net/eric/notarius/internal/core/workspace"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+func TestWorkspaceRecorderWritesSuccessfulCheckpointFiles(t *testing.T) {
+	root := t.TempDir()
+	recorder := newTestRecorder(t, root)
+	doc := &source.SourceDocument{
+		ID:     "source-1",
+		Kind:   "document",
+		Format: "text/plain",
+		Digest: "sha256:source",
+		Units:  []source.SourceUnit{{ID: 1, Kind: "line", Text: "hello", Ref: source.SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 1}}},
+	}
+	chunks := []source.Chunk{
+		{
+			ID:        "chunk-1",
+			SourceID:  "source-1",
+			Index:     0,
+			Ref:       source.SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 1},
+			Content:   []byte("chunk content"),
+			MediaType: "text/plain",
+			Units:     doc.Units,
+		},
+	}
+
+	if err := recorder.SourceRunning("seriatim"); err != nil {
+		t.Fatalf("SourceRunning: %v", err)
+	}
+	assertManifestStatus(t, filepath.Join(root, "source", "manifest.json"), coreworkspace.StatusRunning)
+	if err := recorder.SourceSucceeded("seriatim", doc); err != nil {
+		t.Fatalf("SourceSucceeded: %v", err)
+	}
+	assertManifestStatus(t, filepath.Join(root, "source", "manifest.json"), coreworkspace.StatusSucceeded)
+	if _, err := os.Stat(filepath.Join(root, "source", "source-document.json")); err != nil {
+		t.Fatalf("expected source checkpoint payload: %v", err)
+	}
+
+	if err := recorder.ChunkRunning("generic", doc.Digest); err != nil {
+		t.Fatalf("ChunkRunning: %v", err)
+	}
+	if err := recorder.ChunkSucceeded("generic", doc.Digest, chunks, nil); err != nil {
+		t.Fatalf("ChunkSucceeded: %v", err)
+	}
+	assertManifestStatus(t, filepath.Join(root, "chunk", "manifest.json"), coreworkspace.StatusSucceeded)
+	var chunkPayload struct {
+		Chunks []struct {
+			Content struct {
+				ContentBase64 string `json:"content_base64"`
+				ContentDigest string `json:"content_digest"`
+			} `json:"content"`
+		} `json:"chunks"`
+	}
+	readJSON(t, filepath.Join(root, "chunk", "chunks.json"), &chunkPayload)
+	if len(chunkPayload.Chunks) != 1 {
+		t.Fatalf("checkpoint chunks = %#v, want one", chunkPayload.Chunks)
+	}
+	decoded, err := base64.StdEncoding.DecodeString(chunkPayload.Chunks[0].Content.ContentBase64)
+	if err != nil {
+		t.Fatalf("decode chunk content: %v", err)
+	}
+	if string(decoded) != "chunk content" {
+		t.Fatalf("chunk content = %q, want original content", decoded)
+	}
+	if got, want := chunkPayload.Chunks[0].Content.ContentDigest, contentDigest([]byte("chunk content")); got != want {
+		t.Fatalf("content digest = %q, want %q", got, want)
+	}
+}
+
+func TestWorkspaceArtifactCheckpointsRoundTripCodecIdentityAndBytes(t *testing.T) {
+	root := t.TempDir()
+	recorder := newTestRecorder(t, root)
+	loader := &WorkspaceLoader{root: root}
+	schema := contracts.ArtifactSchema{ID: "dnd.spell_response", Name: "spell response", Version: "v1", JSONSchema: []byte(`{"type":"object"}`)}
+	artifact := contracts.SerializedArtifact{Kind: "dnd.spells", Schema: schema, MediaType: "application/json", Content: []byte(`{"spell_casts":[]}`), Metadata: map[string]any{"spell_cast_count": float64(0)}}
+	stored := pipeline.CheckpointArtifact{LaneID: "spells", ModuleKey: "dnd/spells", SourceID: "source-1", ChunkID: "chunk-1", ChunkIndex: 2, ChunkRef: source.SourceRef{SourceID: "source-1", StartUnitID: 4, EndUnitID: 8}, Artifact: artifact, SchemaDigest: contracts.DigestArtifactSchema(schema)}
+
+	extractDeps := []pipeline.CheckpointFingerprint{{Name: "chunks", Value: "sha256:chunks"}}
+	if err := recorder.ExtractSucceeded("spells", "dnd/spells", extractDeps, []pipeline.CheckpointArtifact{stored}, nil, nil); err != nil {
+		t.Fatalf("ExtractSucceeded: %v", err)
+	}
+	extracted, decision := loader.Extract("spells", "dnd/spells", extractDeps)
+	if !decision.Reused || len(extracted.Outputs) != 1 {
+		t.Fatalf("extract decision=%#v checkpoint=%#v, want reused", decision, extracted)
+	}
+	got := extracted.Outputs[0]
+	if got.Artifact.Kind != artifact.Kind || got.Artifact.Schema.ID != schema.ID || got.Artifact.Schema.Version != schema.Version || got.SchemaDigest != stored.SchemaDigest || string(got.Artifact.Content) != string(artifact.Content) || got.ChunkRef != stored.ChunkRef {
+		t.Fatalf("artifact checkpoint = %#v, want codec identity, bytes, and provenance", got)
+	}
+
+	mergeDeps := artifactOutputDigests([]pipeline.CheckpointArtifact{stored})
+	if err := recorder.MergeSucceeded("spells", "merge", mergeDeps, stored, nil); err != nil {
+		t.Fatalf("MergeSucceeded: %v", err)
+	}
+	merged, decision := loader.Merge("spells", "merge", mergeDeps)
+	if !decision.Reused || string(merged.Output.Artifact.Content) != string(artifact.Content) {
+		t.Fatalf("merge decision=%#v checkpoint=%#v, want reused", decision, merged)
+	}
+
+	normalizeDeps := artifactOutputDigests([]pipeline.CheckpointArtifact{stored})
+	if err := recorder.NormalizeSucceeded("spells", "normalize", normalizeDeps, stored, nil); err != nil {
+		t.Fatalf("NormalizeSucceeded: %v", err)
+	}
+	normalized, decision := loader.Normalize("spells", "normalize", normalizeDeps)
+	if !decision.Reused || normalized.Output.SchemaDigest != stored.SchemaDigest {
+		t.Fatalf("normalize decision=%#v checkpoint=%#v, want reused", decision, normalized)
+	}
+}
+
+func TestWorkspaceLoaderInvalidatesMissingCorruptAndMismatchedCheckpoints(t *testing.T) {
+	t.Run("missing", func(t *testing.T) {
+		loader := &WorkspaceLoader{root: t.TempDir()}
+		if _, decision := loader.Source("seriatim"); decision.Reused || !strings.Contains(decision.Reason, "missing") {
+			t.Fatalf("decision = %#v, want missing invalidation", decision)
+		}
+	})
+
+	t.Run("dependency mismatch", func(t *testing.T) {
+		root := t.TempDir()
+		recorder := newTestRecorder(t, root)
+		chunks := []source.Chunk{{
+			ID:        "chunk-1",
+			SourceID:  "source-1",
+			Content:   []byte("chunk content"),
+			MediaType: "text/plain",
+		}}
+		if err := recorder.ChunkSucceeded("generic", "sha256:source-a", chunks, nil); err != nil {
+			t.Fatalf("ChunkSucceeded: %v", err)
+		}
+		loader := &WorkspaceLoader{root: root}
+		if _, decision := loader.Chunk("generic", "sha256:source-b"); decision.Reused || !strings.Contains(decision.Reason, "dependency") {
+			t.Fatalf("decision = %#v, want dependency invalidation", decision)
+		}
+	})
+
+	t.Run("incompatible workspace schema remains untouched", func(t *testing.T) {
+		root := t.TempDir()
+		recorder := newTestRecorder(t, root)
+		doc := &source.SourceDocument{
+			ID: "source-1", Kind: "document", Format: "text/plain", Digest: "sha256:source",
+			Units: []source.SourceUnit{{ID: 1, Kind: "line", Text: "hello", Ref: source.SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 1}}},
+		}
+		if err := recorder.SourceSucceeded("seriatim", doc); err != nil {
+			t.Fatalf("SourceSucceeded: %v", err)
+		}
+		manifestPath := filepath.Join(root, "source", "manifest.json")
+		manifest := strings.Replace(string(readFile(t, manifestPath)), coreworkspace.WorkspaceSchemaVersion, coreworkspace.WorkspaceSchemaVersionV1, 1)
+		if err := os.WriteFile(manifestPath, []byte(manifest), 0o644); err != nil {
+			t.Fatalf("write legacy manifest: %v", err)
+		}
+		beforeManifest := readFile(t, manifestPath)
+		payloadPath := filepath.Join(root, "source", "source-document.json")
+		beforePayload := readFile(t, payloadPath)
+
+		loader := &WorkspaceLoader{root: root}
+		if _, decision := loader.Source("seriatim"); decision.Reused || !strings.Contains(decision.Reason, "incompatible") || !strings.Contains(decision.Reason, coreworkspace.WorkspaceSchemaVersionV1) {
+			t.Fatalf("decision = %#v, want incompatible legacy schema invalidation", decision)
+		}
+		if got := readFile(t, manifestPath); string(got) != string(beforeManifest) {
+			t.Fatal("legacy manifest changed during reuse decision")
+		}
+		if got := readFile(t, payloadPath); string(got) != string(beforePayload) {
+			t.Fatal("legacy payload changed during reuse decision")
+		}
+	})
+
+	t.Run("corrupt payload", func(t *testing.T) {
+		root := t.TempDir()
+		recorder := newTestRecorder(t, root)
+		chunks := []source.Chunk{{
+			ID:        "chunk-1",
+			SourceID:  "source-1",
+			Content:   []byte("chunk content"),
+			MediaType: "text/plain",
+		}}
+		if err := recorder.ChunkSucceeded("generic", "sha256:source", chunks, nil); err != nil {
+			t.Fatalf("ChunkSucceeded: %v", err)
+		}
+		payloadPath := filepath.Join(root, "chunk", "chunks.json")
+		data := strings.ReplaceAll(string(readFile(t, payloadPath)), contentDigest([]byte("chunk content")), "sha256:bad")
+		if err := os.WriteFile(payloadPath, []byte(data), 0o644); err != nil {
+			t.Fatalf("corrupt chunk payload: %v", err)
+		}
+		loader := &WorkspaceLoader{root: root}
+		if _, decision := loader.Chunk("generic", "sha256:source"); decision.Reused || !strings.Contains(decision.Reason, "invalid") {
+			t.Fatalf("decision = %#v, want corrupt payload invalidation", decision)
+		}
+	})
+}
+
+func TestWorkspaceRecorderRecordsRejectedExtractOutputs(t *testing.T) {
+	root := t.TempDir()
+	recorder := newTestRecorder(t, root)
+	rejected := []contracts.RejectedOutput{
+		{
+			Stage:         string(pipeline.StageExtract),
+			LaneID:        "spells",
+			ModuleKey:     "dnd/spells",
+			ChunkID:       "chunk-1",
+			ValidatorName: "shape",
+			ReasonCode:    "invalid_shape",
+			Message:       "bad shape",
+		},
+	}
+
+	if err := recorder.ExtractRunning("spells", "dnd/spells", []pipeline.CheckpointFingerprint{{Name: "chunks", Value: "sha256:chunks"}}); err != nil {
+		t.Fatalf("ExtractRunning: %v", err)
+	}
+	if err := recorder.ExtractSucceeded("spells", "dnd/spells", nil, nil, rejected, nil); err != nil {
+		t.Fatalf("ExtractSucceeded: %v", err)
+	}
+
+	var manifest coreworkspace.ExtractLaneManifest
+	readJSON(t, filepath.Join(root, "extract", "spells", "manifest.json"), &manifest)
+	if manifest.Status != coreworkspace.StatusSucceededWithRejections || manifest.ValidationStatus != "rejected" {
+		t.Fatalf("extract manifest status = %q validation=%q", manifest.Status, manifest.ValidationStatus)
+	}
+	if len(manifest.Rejections) != 1 || manifest.Rejections[0].Count != 1 || manifest.Rejections[0].ReasonCode != "invalid_shape" {
+		t.Fatalf("rejections = %#v", manifest.Rejections)
+	}
+	var payload struct {
+		Rejected []contracts.RejectedOutput `json:"rejected"`
+	}
+	readJSON(t, filepath.Join(root, "extract", "spells", "outputs.json"), &payload)
+	if len(payload.Rejected) != 1 || payload.Rejected[0].ChunkID != "chunk-1" {
+		t.Fatalf("checkpoint rejected payload = %#v", payload.Rejected)
+	}
+}
+
+func TestWorkspaceRecorderRecordsFailedStages(t *testing.T) {
+	root := t.TempDir()
+	recorder := newTestRecorder(t, root)
+
+	if err := recorder.MergeRunning("spells", "appendorder", nil); err != nil {
+		t.Fatalf("MergeRunning: %v", err)
+	}
+	if err := recorder.MergeFailed("spells", "appendorder", nil, assertErr("merge failed")); err != nil {
+		t.Fatalf("MergeFailed: %v", err)
+	}
+
+	var manifest coreworkspace.MergeLaneManifest
+	readJSON(t, filepath.Join(root, "merge", "spells", "manifest.json"), &manifest)
+	if manifest.Status != coreworkspace.StatusFailed {
+		t.Fatalf("status = %q, want failed", manifest.Status)
+	}
+	if !strings.Contains(manifest.Metadata["error"], "merge failed") {
+		t.Fatalf("metadata = %#v, want error", manifest.Metadata)
+	}
+}
+
+func TestWorkspaceRecorderRecordsWarningOnlyValidation(t *testing.T) {
+	root := t.TempDir()
+	recorder := newTestRecorder(t, root)
+	schema := contracts.ArtifactSchema{ID: "test.artifact", Name: "test_artifact", Version: "v1", JSONSchema: []byte(`{"type":"object"}`)}
+	output := pipeline.CheckpointArtifact{
+		LaneID: "events", ModuleKey: "noop", SourceID: "source-1",
+		Artifact:     contracts.SerializedArtifact{Kind: "test/artifact", Schema: schema, MediaType: "application/json", Content: []byte(`{"ok":true}`)},
+		SchemaDigest: contracts.DigestArtifactSchema(schema),
+	}
+	warnings := []contracts.Warning{{ReasonCode: "note", Message: "warning"}}
+
+	if err := recorder.NormalizeSucceeded("events", "noop", nil, output, warnings); err != nil {
+		t.Fatalf("NormalizeSucceeded: %v", err)
+	}
+
+	var manifest coreworkspace.NormalizeLaneManifest
+	readJSON(t, filepath.Join(root, "normalize", "events", "manifest.json"), &manifest)
+	if manifest.Status != coreworkspace.StatusSucceeded || manifest.ValidationStatus != "approved_with_warnings" {
+		t.Fatalf("normalize manifest status = %q validation=%q", manifest.Status, manifest.ValidationStatus)
+	}
+}
+
+func newTestRecorder(t *testing.T, root string) *WorkspaceRecorder {
+	t.Helper()
+	return &WorkspaceRecorder{root: root}
+}
+
+func assertManifestStatus(t *testing.T, path string, want coreworkspace.StageStatus) {
+	t.Helper()
+	var manifest coreworkspace.StageManifest
+	readJSON(t, path, &manifest)
+	if manifest.Status != want {
+		t.Fatalf("%s status = %q, want %q", path, manifest.Status, want)
+	}
+}
+
+func readJSON(t *testing.T, path string, out any) {
+	t.Helper()
+	data := readFile(t, path)
+	if err := json.Unmarshal(data, out); err != nil {
+		t.Fatalf("decode %q: %v", path, err)
+	}
+}
+
+func readFile(t *testing.T, path string) []byte {
+	t.Helper()
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read %q: %v", path, err)
+	}
+	return data
+}
+
+type assertErr string
+
+func (e assertErr) Error() string { return string(e) }

internal/framework/contracts/artifact.go

@@ -0,0 +1,81 @@
+package contracts
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+)
+
+// ArtifactKind is the stable logical identity of a domain artifact.
+type ArtifactKind string
+
+// ArtifactSchema describes the durable representation owned by an artifact
+// codec. JSONSchema is cloned whenever framework ownership changes.
+type ArtifactSchema struct {
+	ID         string `json:"id"`
+	Name       string `json:"name"`
+	Version    string `json:"version"`
+	JSONSchema []byte `json:"-"`
+}
+
+// SerializedArtifact is the domain-neutral representation of a typed
+// artifact at an explicit serialization boundary.
+type SerializedArtifact struct {
+	Kind      ArtifactKind   `json:"kind"`
+	Schema    ArtifactSchema `json:"schema"`
+	MediaType string         `json:"media_type"`
+	Content   []byte         `json:"-"`
+	Metadata  map[string]any `json:"metadata,omitempty"`
+}
+
+// SerializedOutput associates a domain-neutral artifact with the pipeline
+// operation that produced it. Provenance remains outside codec-owned bytes.
+type SerializedOutput struct {
+	LaneID        string             `json:"lane_id"`
+	NormalizerKey string             `json:"normalizer_key"`
+	SourceID      string             `json:"source_id,omitempty"`
+	Artifact      SerializedArtifact `json:"artifact"`
+}
+
+// ArtifactCodec owns the stable encoding for one concrete artifact type.
+type ArtifactCodec[T any] interface {
+	Kind() ArtifactKind
+	Schema() ArtifactSchema
+	MediaType() string
+	Encode(T) ([]byte, error)
+	Decode([]byte) (T, error)
+}
+
+// DigestArtifactSchema returns the SHA-256 digest of the exact JSON Schema
+// bytes. Schema formatting is therefore part of the registered identity.
+func DigestArtifactSchema(schema ArtifactSchema) string {
+	sum := sha256.Sum256(schema.JSONSchema)
+	return "sha256:" + hex.EncodeToString(sum[:])
+}
+
+func CloneArtifactSchema(schema ArtifactSchema) ArtifactSchema {
+	schema.JSONSchema = append([]byte(nil), schema.JSONSchema...)
+	return schema
+}
+
+func CloneSerializedArtifact(artifact SerializedArtifact) SerializedArtifact {
+	artifact.Schema = CloneArtifactSchema(artifact.Schema)
+	artifact.Content = append([]byte(nil), artifact.Content...)
+	artifact.Metadata = cloneArtifactMetadata(artifact.Metadata)
+	return artifact
+}
+
+func CloneSerializedOutput(output SerializedOutput) SerializedOutput {
+	output.Artifact = CloneSerializedArtifact(output.Artifact)
+	return output
+}
+
+func cloneArtifactMetadata(metadata map[string]any) map[string]any {
+	if len(metadata) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(metadata))
+	for key, value := range metadata {
+		out[key] = value
+	}
+	return out
+}

internal/framework/contracts/artifact_test.go

@@ -0,0 +1,45 @@
+package contracts
+
+import "testing"
+
+func TestDigestArtifactSchemaUsesExactBytes(t *testing.T) {
+	first := ArtifactSchema{JSONSchema: []byte(`{"type":"object"}`)}
+	second := ArtifactSchema{JSONSchema: []byte("{\n  \"type\": \"object\"\n}")}
+
+	if got := DigestArtifactSchema(first); got != "sha256:a2c799262a3ce3c19ef5cdd983bf3d12b43ab3c426227091b909dcb7054738c0" {
+		t.Fatalf("DigestArtifactSchema() = %q, want stable SHA-256", got)
+	}
+	if DigestArtifactSchema(first) == DigestArtifactSchema(second) {
+		t.Fatal("schema digests match for different exact bytes")
+	}
+}
+
+func TestArtifactCloneHelpersOwnSlicesAndMaps(t *testing.T) {
+	schema := ArtifactSchema{ID: "notes.v1", Name: "notes", Version: "v1", JSONSchema: []byte(`{"type":"object"}`)}
+	artifact := SerializedArtifact{
+		Kind:      "test/notes",
+		Schema:    schema,
+		MediaType: "application/json",
+		Content:   []byte(`{"items":["one"]}`),
+		Metadata:  map[string]any{"origin": "test"},
+	}
+
+	clonedSchema := CloneArtifactSchema(schema)
+	cloned := CloneSerializedArtifact(artifact)
+	schema.JSONSchema[0] = '['
+	artifact.Content[0] = '['
+	artifact.Metadata["origin"] = "changed"
+
+	if string(clonedSchema.JSONSchema) != `{"type":"object"}` {
+		t.Fatalf("cloned schema = %q, want original bytes", clonedSchema.JSONSchema)
+	}
+	if string(cloned.Schema.JSONSchema) != `{"type":"object"}` {
+		t.Fatalf("serialized artifact schema = %q, want original bytes", cloned.Schema.JSONSchema)
+	}
+	if string(cloned.Content) != `{"items":["one"]}` {
+		t.Fatalf("cloned content = %q, want original bytes", cloned.Content)
+	}
+	if cloned.Metadata["origin"] != "test" {
+		t.Fatalf("cloned metadata = %#v, want independent map", cloned.Metadata)
+	}
+}

internal/framework/contracts/composition_test.go

@@ -1,307 +0,0 @@
-package contracts_test
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
-	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-)
-
-var _ contracts.InputAdapter = compositionAdapter{}
-var _ contracts.Chunker = compositionChunker{}
-var _ contracts.Extractor = compositionExtractor{}
-var _ contracts.Merger = compositionMerger{}
-var _ contracts.Normalizer = compositionNormalizer{}
-var _ contracts.Validator = compositionValidator{}
-var _ contracts.OutputEncoder = compositionOutputEncoder{}
-
-func TestContractsComposeAcrossPackages(t *testing.T) {
-	ctx := context.Background()
-	adapter := compositionAdapter{}
-	chunker := compositionChunker{}
-	extractor := compositionExtractor{}
-	merger := compositionMerger{}
-	normalizer := compositionNormalizer{}
-	validator := compositionValidator{}
-	encoder := compositionOutputEncoder{}
-
-	doc, err := adapter.Parse(ctx, contracts.ParseRequest{SourceID: "source-1"})
-	if err != nil {
-		t.Fatalf("Parse() error = %v, want nil", err)
-	}
-	if err := source.ValidateDocument(doc); err != nil {
-		t.Fatalf("ValidateDocument() error = %v, want nil", err)
-	}
-
-	chunking, err := chunker.Chunk(ctx, contracts.ChunkRequest{
-		Source:   doc,
-		Metadata: map[string]any{"max_units": 2},
-	})
-	if err != nil {
-		t.Fatalf("Chunk() error = %v, want nil", err)
-	}
-	if len(chunking.Chunks) != 1 {
-		t.Fatalf("len(Chunks) = %d, want 1", len(chunking.Chunks))
-	}
-
-	extraction, err := extractor.Extract(ctx, contracts.ExtractionRequest{
-		Source:         doc,
-		Chunk:          &chunking.Chunks[0],
-		AmbientContext: map[string]any{"synopsis": "example synopsis"},
-	})
-	if err != nil {
-		t.Fatalf("Extract() error = %v, want nil", err)
-	}
-	if len(extraction.Candidates) != 1 {
-		t.Fatalf("len(Candidates) = %d, want 1", len(extraction.Candidates))
-	}
-
-	candidate := extraction.Candidates[0]
-	for _, ref := range candidate.SourceRefs {
-		if err := source.ValidateRef(doc, ref); err != nil {
-			t.Fatalf("ValidateRef() error = %v, want nil", err)
-		}
-	}
-
-	merge, err := merger.Merge(ctx, contracts.MergeRequest{
-		Source: doc,
-		LaneID: candidate.ArtifactType,
-		ChunkArtifacts: []contracts.ChunkArtifacts{
-			{
-				Chunk:      chunking.Chunks[0],
-				Candidates: extraction.Candidates,
-			},
-		},
-	})
-	if err != nil {
-		t.Fatalf("Merge() error = %v, want nil", err)
-	}
-	if len(merge.Candidates) != 1 {
-		t.Fatalf("len(merge.Candidates) = %d, want 1", len(merge.Candidates))
-	}
-
-	normalize, err := normalizer.Normalize(ctx, contracts.NormalizeRequest{
-		Source:     doc,
-		LaneID:     candidate.ArtifactType,
-		Candidates: merge.Candidates,
-	})
-	if err != nil {
-		t.Fatalf("Normalize() error = %v, want nil", err)
-	}
-	if len(normalize.Candidates) != 1 {
-		t.Fatalf("len(normalize.Candidates) = %d, want 1", len(normalize.Candidates))
-	}
-
-	validation, err := validator.Validate(ctx, contracts.ValidationRequest{
-		Source:     doc,
-		Candidates: normalize.Candidates,
-	})
-	if err != nil {
-		t.Fatalf("Validate() error = %v, want nil", err)
-	}
-	if len(validation.Decisions) != 1 {
-		t.Fatalf("len(Decisions) = %d, want 1", len(validation.Decisions))
-	}
-
-	decision := validation.Decisions[0]
-	if !decision.Approved {
-		t.Fatal("Approved = false, want true")
-	}
-	if decision.CandidateIndex != candidate.Index {
-		t.Fatalf("CandidateIndex = %d, want %d", decision.CandidateIndex, candidate.Index)
-	}
-
-	output, err := encoder.Encode(ctx, contracts.OutputRequest{
-		Manifest: artifacts.RunManifest{RunID: "run-1"},
-		Approved: []artifacts.Artifact{
-			artifacts.ArtifactFromCandidate(normalize.Candidates[0]),
-		},
-	})
-	if err != nil {
-		t.Fatalf("Encode() error = %v, want nil", err)
-	}
-	if len(output.Files) != 1 {
-		t.Fatalf("len(Files) = %d, want 1", len(output.Files))
-	}
-	if output.Files[0].ContentType != "application/json" {
-		t.Fatalf("ContentType = %q, want application/json", output.Files[0].ContentType)
-	}
-	if len(output.Files[0].Bytes) == 0 {
-		t.Fatal("len(Bytes) = 0, want encoded bytes")
-	}
-}
-
-type compositionAdapter struct{}
-
-func (adapter compositionAdapter) Key() string {
-	return "generic-input"
-}
-
-func (adapter compositionAdapter) Parse(ctx context.Context, req contracts.ParseRequest) (*source.SourceDocument, error) {
-	return &source.SourceDocument{
-		ID:     req.SourceID,
-		Kind:   "document",
-		Format: "text/plain",
-		Digest: "sha256:abc123",
-		Units: []source.SourceUnit{
-			{ID: "u1", Kind: "unit", Text: "First source unit."},
-			{ID: "u2", Kind: "unit", Text: "Second source unit."},
-		},
-	}, nil
-}
-
-type compositionChunker struct{}
-
-func (chunker compositionChunker) Key() string {
-	return "generic-chunker"
-}
-
-func (chunker compositionChunker) Chunk(ctx context.Context, req contracts.ChunkRequest) (contracts.ChunkResult, error) {
-	if req.Source == nil {
-		return contracts.ChunkResult{}, errors.New("source document is required")
-	}
-
-	return contracts.ChunkResult{
-		Chunks: []contracts.SourceChunk{
-			{
-				ID:       req.Source.ID + ":chunk:0",
-				SourceID: req.Source.ID,
-				Index:    0,
-				Units:    append([]source.SourceUnit(nil), req.Source.Units...),
-				Metadata: map[string]any{"strategy": "whole-document"},
-			},
-		},
-	}, nil
-}
-
-type compositionExtractor struct{}
-
-func (extractor compositionExtractor) Key() string {
-	return "generic-extractor"
-}
-
-func (extractor compositionExtractor) ArtifactType() string {
-	return "generic-artifact"
-}
-
-func (extractor compositionExtractor) SchemaVersion() string {
-	return "v1"
-}
-
-func (extractor compositionExtractor) Validators() []contracts.Validator {
-	return []contracts.Validator{compositionValidator{}}
-}
-
-func (extractor compositionExtractor) Extract(ctx context.Context, req contracts.ExtractionRequest) (contracts.ExtractionResult, error) {
-	if req.Source == nil {
-		return contracts.ExtractionResult{}, errors.New("source document is required")
-	}
-	units := req.Source.Units
-	if req.Chunk != nil {
-		units = req.Chunk.Units
-	}
-	if req.AmbientContext["synopsis"] == "" {
-		return contracts.ExtractionResult{}, errors.New("ambient synopsis is required")
-	}
-
-	return contracts.ExtractionResult{
-		Candidates: []artifacts.ArtifactCandidate{
-			{
-				Index:         0,
-				ExtractorKey:  extractor.Key(),
-				ArtifactType:  extractor.ArtifactType(),
-				SchemaVersion: extractor.SchemaVersion(),
-				Payload:       json.RawMessage(`{"value":"example"}`),
-				SourceRefs: []source.SourceRef{
-					{
-						SourceID:    req.Source.ID,
-						StartUnitID: units[0].ID,
-						EndUnitID:   units[len(units)-1].ID,
-					},
-				},
-			},
-		},
-	}, nil
-}
-
-type compositionMerger struct{}
-
-func (merger compositionMerger) Key() string {
-	return "generic-merger"
-}
-
-func (merger compositionMerger) Merge(ctx context.Context, req contracts.MergeRequest) (contracts.MergeResult, error) {
-	var candidates []artifacts.ArtifactCandidate
-	for _, chunkArtifacts := range req.ChunkArtifacts {
-		candidates = append(candidates, chunkArtifacts.Candidates...)
-	}
-
-	return contracts.MergeResult{Candidates: candidates}, nil
-}
-
-type compositionNormalizer struct{}
-
-func (normalizer compositionNormalizer) Key() string {
-	return "generic-normalizer"
-}
-
-func (normalizer compositionNormalizer) Normalize(ctx context.Context, req contracts.NormalizeRequest) (contracts.NormalizeResult, error) {
-	return contracts.NormalizeResult{Candidates: req.Candidates}, nil
-}
-
-type compositionValidator struct{}
-
-func (validator compositionValidator) Name() string {
-	return "generic-validator"
-}
-
-func (validator compositionValidator) Validate(ctx context.Context, req contracts.ValidationRequest) (contracts.ValidationResult, error) {
-	decisions := make([]contracts.ValidationDecision, 0, len(req.Candidates))
-	for _, candidate := range req.Candidates {
-		decisions = append(decisions, contracts.ValidationDecision{
-			CandidateIndex: candidate.Index,
-			Approved:       true,
-			ReasonCode:     "accepted",
-			Message:        "candidate accepted",
-		})
-	}
-
-	return contracts.ValidationResult{
-		ValidatorName: validator.Name(),
-		Decisions:     decisions,
-	}, nil
-}
-
-type compositionOutputEncoder struct{}
-
-func (encoder compositionOutputEncoder) Key() string {
-	return "generic-output"
-}
-
-func (encoder compositionOutputEncoder) Encode(ctx context.Context, req contracts.OutputRequest) (contracts.OutputResult, error) {
-	payload := struct {
-		RunID         string `json:"run_id"`
-		ApprovedCount int    `json:"approved_count"`
-	}{
-		RunID:         req.Manifest.RunID,
-		ApprovedCount: len(req.Approved),
-	}
-	encoded, err := json.Marshal(payload)
-	if err != nil {
-		return contracts.OutputResult{}, err
-	}
-
-	return contracts.OutputResult{
-		Files: []contracts.OutputFile{
-			{
-				Name:        "artifacts/generic.json",
-				ContentType: "application/json",
-				Bytes:       encoded,
-			},
-		},
-	}, nil
-}

internal/framework/contracts/contracts.go

@@ -8,38 +8,127 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 )
 
-type LLMMessage struct {
-	Role    string `json:"role"`
-	Content string `json:"content"`
-}
-
 type StructuredCompletionRequest struct {
-	StageName          string          `json:"stage_name"`
-	Messages           []LLMMessage    `json:"messages"`
-	Model              string          `json:"model,omitempty"`
-	ResponseSchemaName string          `json:"response_schema_name,omitempty"`
-	ResponseSchema     json.RawMessage `json:"response_schema,omitempty"`
+	StageName     string         `json:"stage_name"`
+	PromptID      string         `json:"prompt_id,omitempty"`
+	PromptVersion string         `json:"prompt_version,omitempty"`
+	ProfileID     string         `json:"profile_id,omitempty"`
+	SessionID     string         `json:"session_id,omitempty"`
+	Inputs        LLMInputSet    `json:"inputs,omitempty"`
+	Vars          map[string]any `json:"vars,omitempty"`
 }
 
 type StructuredCompletionResponse struct {
-	Content          json.RawMessage `json:"content"`
-	Provider         string          `json:"provider,omitempty"`
-	Model            string          `json:"model,omitempty"`
-	PromptTokens     int             `json:"prompt_tokens,omitempty"`
-	CompletionTokens int             `json:"completion_tokens,omitempty"`
-	TotalTokens      int             `json:"total_tokens,omitempty"`
+	Content          json.RawMessage   `json:"content"`
+	Provider         string            `json:"provider,omitempty"`
+	Model            string            `json:"model,omitempty"`
+	ProfileID        string            `json:"profile_id,omitempty"`
+	PromptTokens     int               `json:"prompt_tokens,omitempty"`
+	CompletionTokens int               `json:"completion_tokens,omitempty"`
+	TotalTokens      int               `json:"total_tokens,omitempty"`
+	Debug            *LLMDebugMaterial `json:"debug,omitempty"`
 }
 
 type StructuredLLMClient interface {
 	CompleteStructured(ctx context.Context, req StructuredCompletionRequest, out any) (StructuredCompletionResponse, error)
 }
 
+type LLMDebugMaterial struct {
+	Prompt   *LLMDebugPrompt   `json:"prompt,omitempty"`
+	Response *LLMDebugResponse `json:"response,omitempty"`
+}
+
+type LLMDebugPrompt struct {
+	PromptID             string            `json:"prompt_id,omitempty"`
+	PromptVersion        string            `json:"prompt_version,omitempty"`
+	PromptHash           string            `json:"prompt_hash,omitempty"`
+	SelectedProfileID    string            `json:"selected_profile_id,omitempty"`
+	SessionID            string            `json:"session_id,omitempty"`
+	RenderedPromptHash   string            `json:"rendered_prompt_hash,omitempty"`
+	Messages             []LLMDebugMessage `json:"messages,omitempty"`
+	EffectiveModelParams map[string]any    `json:"effective_model_params,omitempty"`
+	OutputContract       map[string]any    `json:"output_contract,omitempty"`
+	StructuredOutput     map[string]any    `json:"structured_output,omitempty"`
+	InputHashes          map[string]string `json:"input_hashes,omitempty"`
+}
+
+type LLMDebugMessage struct {
+	Role         string         `json:"role"`
+	Content      string         `json:"content"`
+	CacheControl map[string]any `json:"cache_control,omitempty"`
+}
+
+type LLMDebugResponse struct {
+	Content              string            `json:"content,omitempty"`
+	RunID                string            `json:"run_id,omitempty"`
+	PromptID             string            `json:"prompt_id,omitempty"`
+	PromptVersion        string            `json:"prompt_version,omitempty"`
+	PromptHash           string            `json:"prompt_hash,omitempty"`
+	RenderedPromptHash   string            `json:"rendered_prompt_hash,omitempty"`
+	SelectedProfileID    string            `json:"selected_profile_id,omitempty"`
+	ModelName            string            `json:"model_name,omitempty"`
+	Endpoint             string            `json:"endpoint,omitempty"`
+	EffectiveModelParams map[string]any    `json:"effective_model_params,omitempty"`
+	InputHashes          map[string]string `json:"input_hashes,omitempty"`
+	Validation           map[string]any    `json:"validation,omitempty"`
+	Usage                LLMDebugUsage     `json:"usage,omitempty"`
+}
+
+type LLMDebugUsage struct {
+	PromptTokens     int `json:"prompt_tokens,omitempty"`
+	CompletionTokens int `json:"completion_tokens,omitempty"`
+	TotalTokens      int `json:"total_tokens,omitempty"`
+	CachedTokens     int `json:"cached_tokens,omitempty"`
+	CacheWriteTokens int `json:"cache_write_tokens,omitempty"`
+}
+
+type LLMProfileManifestProvider interface {
+	LLMProfileManifests() []artifacts.LLMProfileManifest
+}
+
+type LLMInputMaterial struct {
+	Name      string `json:"name"`
+	MediaType string `json:"media_type,omitempty"`
+	Content   []byte `json:"-"`
+	Digest    string `json:"digest,omitempty"`
+	OriginURI string `json:"origin_uri,omitempty"`
+	SizeBytes int64  `json:"size_bytes,omitempty"`
+}
+
+func NewLLMInputMaterial(name string, mediaType string, content []byte, digest string, originURI string) LLMInputMaterial {
+	return LLMInputMaterial{
+		Name:      name,
+		MediaType: mediaType,
+		Content:   append([]byte(nil), content...),
+		Digest:    digest,
+		OriginURI: originURI,
+		SizeBytes: int64(len(content)),
+	}
+}
+
+func (material LLMInputMaterial) Clone() LLMInputMaterial {
+	material.Content = append([]byte(nil), material.Content...)
+	return material
+}
+
+type LLMInputSet map[string]LLMInputMaterial
+
+func (set LLMInputSet) Clone() LLMInputSet {
+	if len(set) == 0 {
+		return nil
+	}
+	out := make(LLMInputSet, len(set))
+	for key, material := range set {
+		out[key] = material.Clone()
+	}
+	return out
+}
+
 type ParseRequest struct {
 	SourceID   string         `json:"source_id,omitempty"`
 	Path       string         `json:"path,omitempty"`
 	Raw        []byte         `json:"-"`
 	LLMProfile string         `json:"llm_profile,omitempty"`
-	Options    map[string]any `json:"options,omitempty"`
 	Metadata   map[string]any `json:"metadata,omitempty"`
 }
 
@@ -48,122 +137,89 @@ type InputAdapter interface {
 	Parse(ctx context.Context, req ParseRequest) (*source.SourceDocument, error)
 }
 
-type SourceChunk struct {
-	ID       string              `json:"id"`
-	SourceID string              `json:"source_id"`
-	Index    int                 `json:"index"`
-	Units    []source.SourceUnit `json:"units"`
-	Metadata map[string]any      `json:"metadata,omitempty"`
-}
-
 type ChunkRequest struct {
-	Source     *source.SourceDocument `json:"-"`
-	LLMProfile string                 `json:"llm_profile,omitempty"`
-	Options    map[string]any         `json:"options,omitempty"`
-	Metadata   map[string]any         `json:"metadata,omitempty"`
+	Source      *source.SourceDocument `json:"-"`
+	SourceInput LLMInputMaterial       `json:"source_input,omitempty"`
+	SessionID   string                 `json:"session_id,omitempty"`
+	References  ReferenceSet           `json:"references,omitempty"`
+	LLMProfile  string                 `json:"llm_profile,omitempty"`
+	Metadata    map[string]any         `json:"metadata,omitempty"`
 }
 
 type ChunkResult struct {
-	Chunks   []SourceChunk `json:"chunks"`
-	Warnings []Warning     `json:"warnings,omitempty"`
+	Chunks   []source.Chunk `json:"chunks"`
+	Warnings []Warning      `json:"warnings,omitempty"`
 }
 
 type Chunker interface {
 	Key() string
+	ReferenceSlots() []ReferenceSlot
 	Chunk(ctx context.Context, req ChunkRequest) (ChunkResult, error)
 }
 
-type ExtractionRequest struct {
-	Source         *source.SourceDocument `json:"-"`
-	Chunk          *SourceChunk           `json:"chunk,omitempty"`
-	AmbientContext map[string]any         `json:"ambient_context,omitempty"`
-	LLMClient      StructuredLLMClient    `json:"-"`
-	LLMProfile     string                 `json:"llm_profile,omitempty"`
-	Options        map[string]any         `json:"options,omitempty"`
-	Metadata       map[string]any         `json:"metadata,omitempty"`
+const (
+	ReferenceBindingSourceConfig = "config"
+	ReferenceBindingSourceCLI    = "cli"
+)
+
+type ReferenceSlot struct {
+	Name               string   `json:"name"`
+	Description        string   `json:"description,omitempty"`
+	Required           bool     `json:"required,omitempty"`
+	AcceptedMediaTypes []string `json:"accepted_media_types,omitempty"`
+	Multiple           bool     `json:"multiple,omitempty"`
+	MaxBytes           int64    `json:"max_bytes,omitempty"`
 }
 
-type ExtractionResult struct {
-	Candidates []artifacts.ArtifactCandidate `json:"candidates,omitempty"`
-	Warnings   []Warning                     `json:"warnings,omitempty"`
+func CloneReferenceSlots(slots []ReferenceSlot) []ReferenceSlot {
+	if len(slots) == 0 {
+		return nil
+	}
+	out := make([]ReferenceSlot, len(slots))
+	for i, slot := range slots {
+		slot.AcceptedMediaTypes = append([]string(nil), slot.AcceptedMediaTypes...)
+		out[i] = slot
+	}
+	return out
 }
 
-type Extractor interface {
-	Key() string
-	ArtifactType() string
-	SchemaVersion() string
-	Validators() []Validator
-	Extract(ctx context.Context, req ExtractionRequest) (ExtractionResult, error)
+type ReferenceOrigin struct {
+	Type string `json:"type"`
+	URI  string `json:"uri,omitempty"`
 }
 
-type ChunkArtifacts struct {
-	Chunk      SourceChunk                   `json:"chunk"`
-	Candidates []artifacts.ArtifactCandidate `json:"candidates"`
+type ReferenceItem struct {
+	SlotName      string          `json:"slot_name"`
+	MediaType     string          `json:"media_type,omitempty"`
+	Content       []byte          `json:"-"`
+	Digest        string          `json:"digest,omitempty"`
+	Origin        ReferenceOrigin `json:"origin"`
+	SizeBytes     int64           `json:"size_bytes,omitempty"`
+	BindingSource string          `json:"binding_source,omitempty"`
 }
 
-type MergeRequest struct {
-	Source         *source.SourceDocument `json:"-"`
-	LaneID         string                 `json:"lane_id"`
-	ChunkArtifacts []ChunkArtifacts       `json:"chunk_artifacts"`
-	LLMProfile     string                 `json:"llm_profile,omitempty"`
-	Options        map[string]any         `json:"options,omitempty"`
-	Metadata       map[string]any         `json:"metadata,omitempty"`
+type ResolvedReferenceSlot struct {
+	Slot  ReferenceSlot   `json:"slot"`
+	Items []ReferenceItem `json:"items,omitempty"`
 }
 
-type MergeResult struct {
-	Candidates []artifacts.ArtifactCandidate `json:"candidates"`
-	Warnings   []Warning                     `json:"warnings,omitempty"`
+type ReferenceSet struct {
+	Slots map[string]ResolvedReferenceSlot `json:"slots,omitempty"`
 }
 
-type Merger interface {
-	Key() string
-	Merge(ctx context.Context, req MergeRequest) (MergeResult, error)
-}
+type ExecutionClass string
 
-type NormalizeRequest struct {
-	Source     *source.SourceDocument        `json:"-"`
-	LaneID     string                        `json:"lane_id"`
-	Candidates []artifacts.ArtifactCandidate `json:"candidates"`
-	LLMProfile string                        `json:"llm_profile,omitempty"`
-	Options    map[string]any                `json:"options,omitempty"`
-	Metadata   map[string]any                `json:"metadata,omitempty"`
-}
-
-type NormalizeResult struct {
-	Candidates []artifacts.ArtifactCandidate `json:"candidates"`
-	Warnings   []Warning                     `json:"warnings,omitempty"`
-}
-
-type Normalizer interface {
-	Key() string
-	Normalize(ctx context.Context, req NormalizeRequest) (NormalizeResult, error)
-}
-
-type ValidationRequest struct {
-	Source     *source.SourceDocument        `json:"-"`
-	Candidates []artifacts.ArtifactCandidate `json:"candidates"`
-	LLMProfile string                        `json:"llm_profile,omitempty"`
-	Options    map[string]any                `json:"options,omitempty"`
-	Metadata   map[string]any                `json:"metadata,omitempty"`
-}
-
-type ValidationDecision struct {
-	CandidateIndex         int    `json:"candidate_index"`
-	Approved               bool   `json:"approved"`
-	ReasonCode             string `json:"reason_code"`
-	Message                string `json:"message"`
-	DiagnosticArtifactPath string `json:"diagnostic_artifact_path,omitempty"`
-}
+const (
+	ExecutionClassDeterministic ExecutionClass = "deterministic"
+	ExecutionClassLLMBacked     ExecutionClass = "llm_backed"
+)
 
 type ValidationResult struct {
-	ValidatorName string               `json:"validator_name"`
-	Decisions     []ValidationDecision `json:"decisions"`
-	Warnings      []Warning            `json:"warnings,omitempty"`
-}
-
-type Validator interface {
-	Name() string
-	Validate(ctx context.Context, req ValidationRequest) (ValidationResult, error)
+	Approved               bool      `json:"approved"`
+	ReasonCode             string    `json:"reason_code,omitempty"`
+	Message                string    `json:"message,omitempty"`
+	DiagnosticArtifactPath string    `json:"diagnostic_artifact_path,omitempty"`
+	Warnings               []Warning `json:"warnings,omitempty"`
 }
 
 type Warning struct {
@@ -173,13 +229,12 @@ type Warning struct {
 }
 
 type OutputRequest struct {
-	Manifest   artifacts.RunManifest        `json:"manifest"`
-	Approved   []artifacts.Artifact         `json:"approved,omitempty"`
-	Rejected   []artifacts.RejectedArtifact `json:"rejected,omitempty"`
-	Warnings   []Warning                    `json:"warnings,omitempty"`
-	LLMProfile string                       `json:"llm_profile,omitempty"`
-	Options    map[string]any               `json:"options,omitempty"`
-	Metadata   map[string]any               `json:"metadata,omitempty"`
+	Manifest         artifacts.RunManifest `json:"manifest"`
+	NormalizeOutputs []SerializedOutput    `json:"normalize_outputs,omitempty"`
+	Rejected         []RejectedOutput      `json:"rejected,omitempty"`
+	Warnings         []Warning             `json:"warnings,omitempty"`
+	LLMProfile       string                `json:"llm_profile,omitempty"`
+	Metadata         map[string]any        `json:"metadata,omitempty"`
 }
 
 type OutputFile struct {
@@ -198,6 +253,19 @@ type OutputEncoder interface {
 	Encode(ctx context.Context, req OutputRequest) (OutputResult, error)
 }
 
+type RejectedOutput struct {
+	Stage                  string `json:"stage"`
+	LaneID                 string `json:"lane_id,omitempty"`
+	ModuleKey              string `json:"module_key,omitempty"`
+	ChunkID                string `json:"chunk_id,omitempty"`
+	ChunkIndex             int    `json:"chunk_index,omitempty"`
+	ValidatorName          string `json:"validator_name,omitempty"`
+	ReasonCode             string `json:"reason_code,omitempty"`
+	Message                string `json:"message"`
+	AttemptCount           int    `json:"attempt_count,omitempty"`
+	DiagnosticArtifactPath string `json:"diagnostic_artifact_path,omitempty"`
+}
+
 type ManifestMetadataProvider interface {
 	ManifestMetadata() map[string]any
 }

internal/framework/contracts/contracts_test.go

@@ -3,6 +3,7 @@ package contracts
 import (
 	"context"
 	"encoding/json"
+	"reflect"
 	"testing"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
@@ -11,20 +12,15 @@ import (
 
 var _ InputAdapter = fakeAdapter{}
 var _ Chunker = fakeChunker{}
-var _ Extractor = fakeExtractor{}
-var _ Merger = fakeMerger{}
-var _ Normalizer = fakeNormalizer{}
-var _ Validator = fakeValidator{}
+var _ Extractor[fakeArtifact] = fakeExtractor{}
+var _ Merger[fakeArtifact] = fakeMerger{}
+var _ Normalizer[fakeArtifact] = fakeNormalizer{}
 var _ StructuredLLMClient = fakeLLMClient{}
 var _ OutputEncoder = fakeOutputEncoder{}
 
-func TestFakeExtractorReturnsCandidateAndValidator(t *testing.T) {
-	validator := fakeValidator{name: "generic-validator"}
+func TestFakeExtractorReturnsTypedOutput(t *testing.T) {
 	extractor := fakeExtractor{
-		key:           "generic-extractor",
-		artifactType:  "generic-artifact",
-		schemaVersion: "v1",
-		validators:    []Validator{validator},
+		key: "generic-extractor",
 	}
 	doc := &source.SourceDocument{
 		ID:     "source-1",
@@ -32,11 +28,11 @@ func TestFakeExtractorReturnsCandidateAndValidator(t *testing.T) {
 		Format: "text/plain",
 		Digest: "sha256:abc123",
 		Units: []source.SourceUnit{
-			{ID: "u1", Kind: "section", Text: "Source text."},
+			{ID: 1, Kind: "section", Text: "Source text."},
 		},
 	}
 
-	result, err := extractor.Extract(context.Background(), ExtractionRequest{Source: doc})
+	result, err := extractor.Extract(context.Background(), TypedExtractionRequest{Source: doc})
 	if err != nil {
 		t.Fatalf("Extract() error = %v, want nil", err)
 	}
@@ -44,37 +40,8 @@ func TestFakeExtractorReturnsCandidateAndValidator(t *testing.T) {
 	if extractor.Key() != "generic-extractor" {
 		t.Fatalf("Key() = %q, want generic-extractor", extractor.Key())
 	}
-	if extractor.ArtifactType() != "generic-artifact" {
-		t.Fatalf("ArtifactType() = %q, want generic-artifact", extractor.ArtifactType())
-	}
-	if extractor.SchemaVersion() != "v1" {
-		t.Fatalf("SchemaVersion() = %q, want v1", extractor.SchemaVersion())
-	}
-	if len(extractor.Validators()) != 1 {
-		t.Fatalf("len(Validators()) = %d, want 1", len(extractor.Validators()))
-	}
-	if extractor.Validators()[0].Name() != "generic-validator" {
-		t.Fatalf("Validators()[0].Name() = %q, want generic-validator", extractor.Validators()[0].Name())
-	}
-	if len(result.Candidates) != 1 {
-		t.Fatalf("len(Candidates) = %d, want 1", len(result.Candidates))
-	}
-
-	candidate := result.Candidates[0]
-	if candidate.Index != 0 {
-		t.Fatalf("ArtifactCandidate.Index = %d, want 0", candidate.Index)
-	}
-	if candidate.ExtractorKey != extractor.Key() {
-		t.Fatalf("ArtifactCandidate.ExtractorKey = %q, want %q", candidate.ExtractorKey, extractor.Key())
-	}
-	if candidate.ArtifactType != extractor.ArtifactType() {
-		t.Fatalf("ArtifactCandidate.ArtifactType = %q, want %q", candidate.ArtifactType, extractor.ArtifactType())
-	}
-	if candidate.SchemaVersion != extractor.SchemaVersion() {
-		t.Fatalf("ArtifactCandidate.SchemaVersion = %q, want %q", candidate.SchemaVersion, extractor.SchemaVersion())
-	}
-	if string(candidate.Payload) != `{"value":"example"}` {
-		t.Fatalf("ArtifactCandidate.Payload = %s, want example payload", candidate.Payload)
+	if result.Value.Value != "example" {
+		t.Fatalf("Value = %q, want example", result.Value.Value)
 	}
 }
 
@@ -85,7 +52,7 @@ func TestFakeChunkerReturnsSourceChunks(t *testing.T) {
 		Format: "text/plain",
 		Digest: "sha256:abc123",
 		Units: []source.SourceUnit{
-			{ID: "u1", Kind: "section", Text: "Source text."},
+			{ID: 1, Kind: "section", Text: "Source text."},
 		},
 	}
 	chunker := fakeChunker{key: "generic-chunker"}
@@ -104,43 +71,68 @@ func TestFakeChunkerReturnsSourceChunks(t *testing.T) {
 
 	chunk := result.Chunks[0]
 	if chunk.ID != "source-1:chunk:0" {
-		t.Fatalf("SourceChunk.ID = %q, want source-1:chunk:0", chunk.ID)
+		t.Fatalf("source.Chunk.ID = %q, want source-1:chunk:0", chunk.ID)
 	}
 	if chunk.SourceID != doc.ID {
-		t.Fatalf("SourceChunk.SourceID = %q, want %q", chunk.SourceID, doc.ID)
+		t.Fatalf("source.Chunk.SourceID = %q, want %q", chunk.SourceID, doc.ID)
 	}
 	if chunk.Index != 0 {
-		t.Fatalf("SourceChunk.Index = %d, want 0", chunk.Index)
+		t.Fatalf("source.Chunk.Index = %d, want 0", chunk.Index)
+	}
+	if chunk.Ref.StartUnitID != 1 || chunk.Ref.EndUnitID != 1 {
+		t.Fatalf("source.Chunk.Ref = %#v, want source-1:1-1", chunk.Ref)
+	}
+	if chunk.MediaType != "application/json" || string(chunk.Content) != `{"units":[{"id":1,"kind":"section","text":"Source text."}]}` {
+		t.Fatalf("source.Chunk payload = %q %s, want JSON units", chunk.MediaType, chunk.Content)
 	}
 	if len(chunk.Units) != 1 {
-		t.Fatalf("len(SourceChunk.Units) = %d, want 1", len(chunk.Units))
+		t.Fatalf("len(source.Chunk.Units) = %d, want 1", len(chunk.Units))
 	}
 }
 
-func TestFakeExtractorReceivesChunkAndAmbientContext(t *testing.T) {
-	extractor := fakeExtractor{
-		key:           "generic-extractor",
-		artifactType:  "generic-artifact",
-		schemaVersion: "v1",
-	}
+func TestFakeChunkerReceivesPerRunContext(t *testing.T) {
 	doc := &source.SourceDocument{
 		ID:     "source-1",
 		Kind:   "document",
 		Format: "text/plain",
 		Digest: "sha256:abc123",
 		Units: []source.SourceUnit{
-			{ID: "u1", Kind: "section", Text: "First source text."},
-			{ID: "u2", Kind: "section", Text: "Second source text."},
+			{ID: 1, Kind: "section", Text: "Source text."},
 		},
 	}
-	chunk := SourceChunk{
-		ID:       "source-1:chunk:1",
-		SourceID: doc.ID,
-		Index:    1,
-		Units:    []source.SourceUnit{doc.Units[1]},
+	chunker := &recordingChunker{key: "llm-chunker"}
+
+	if _, err := chunker.Chunk(context.Background(), ChunkRequest{Source: doc, SessionID: "session", LLMProfile: "profile"}); err != nil {
+		t.Fatalf("Chunk() error = %v, want nil", err)
+	}
+	if chunker.request.SessionID != "session" || chunker.request.LLMProfile != "profile" {
+		t.Fatalf("ChunkRequest = %#v, want per-run session and profile", chunker.request)
+	}
+}
+
+func TestFakeExtractorReceivesChunkAndAmbientContext(t *testing.T) {
+	extractor := fakeExtractor{key: "generic-extractor"}
+	doc := &source.SourceDocument{
+		ID:     "source-1",
+		Kind:   "document",
+		Format: "text/plain",
+		Digest: "sha256:abc123",
+		Units: []source.SourceUnit{
+			{ID: 1, Kind: "section", Text: "First source text."},
+			{ID: 2, Kind: "section", Text: "Second source text."},
+		},
+	}
+	chunk := source.Chunk{
+		ID:        "source-1:chunk:1",
+		SourceID:  doc.ID,
+		Index:     1,
+		Ref:       source.SourceRef{SourceID: doc.ID, StartUnitID: 2, EndUnitID: 2},
+		Content:   []byte(`{"units":[{"id":2,"kind":"section","text":"Second source text."}]}`),
+		MediaType: "application/json",
+		Units:     []source.SourceUnit{doc.Units[1]},
 	}
 
-	result, err := extractor.Extract(context.Background(), ExtractionRequest{
+	result, err := extractor.Extract(context.Background(), TypedExtractionRequest{
 		Source:         doc,
 		Chunk:          &chunk,
 		AmbientContext: map[string]any{"mode": "chunked"},
@@ -148,51 +140,211 @@ func TestFakeExtractorReceivesChunkAndAmbientContext(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Extract() error = %v, want nil", err)
 	}
-	if len(result.Candidates) != 1 {
-		t.Fatalf("len(Candidates) = %d, want 1", len(result.Candidates))
+	if result.Value.Value != "chunked" {
+		t.Fatalf("Value = %q, want chunked", result.Value.Value)
+	}
+}
+
+func TestReferenceSetDataTypes(t *testing.T) {
+	references := ReferenceSet{
+		Slots: map[string]ResolvedReferenceSlot{
+			"roster": {
+				Slot: ReferenceSlot{
+					Name:               "roster",
+					Description:        "Known characters",
+					Required:           true,
+					AcceptedMediaTypes: []string{"text/plain"},
+					Multiple:           true,
+					MaxBytes:           4096,
+				},
+				Items: []ReferenceItem{
+					{
+						SlotName:  "roster",
+						MediaType: "text/plain",
+						Content:   []byte("Aria\nBryn\n"),
+						Digest:    "sha256:reference",
+						Origin: ReferenceOrigin{
+							Type: "file",
+							URI:  "file:///tmp/roster.txt",
+						},
+						SizeBytes:     10,
+						BindingSource: ReferenceBindingSourceConfig,
+					},
+				},
+			},
+		},
 	}
 
-	candidate := result.Candidates[0]
-	if string(candidate.Payload) != `{"value":"chunked"}` {
-		t.Fatalf("ArtifactCandidate.Payload = %s, want chunked payload", candidate.Payload)
+	item := references.Slots["roster"].Items[0]
+	if item.SlotName != "roster" || item.MediaType != "text/plain" || string(item.Content) != "Aria\nBryn\n" {
+		t.Fatalf("reference item = %#v, want constructed item fields", item)
 	}
-	if len(candidate.SourceRefs) != 1 {
-		t.Fatalf("len(SourceRefs) = %d, want 1", len(candidate.SourceRefs))
+	if item.BindingSource != ReferenceBindingSourceConfig {
+		t.Fatalf("BindingSource = %q, want %q", item.BindingSource, ReferenceBindingSourceConfig)
 	}
-	ref := candidate.SourceRefs[0]
-	if ref.StartUnitID != "u2" || ref.EndUnitID != "u2" {
-		t.Fatalf("SourceRef = %+v, want u2 range", ref)
+}
+
+func TestCloneReferenceSlotsEmptyInputReturnsNil(t *testing.T) {
+	if got := CloneReferenceSlots(nil); got != nil {
+		t.Fatalf("CloneReferenceSlots(nil) = %#v, want nil", got)
+	}
+	if got := CloneReferenceSlots([]ReferenceSlot{}); got != nil {
+		t.Fatalf("CloneReferenceSlots(empty) = %#v, want nil", got)
+	}
+}
+
+func TestCloneReferenceSlotsPreservesFields(t *testing.T) {
+	slots := []ReferenceSlot{
+		{
+			Name:               "roster",
+			Description:        "Known characters",
+			Required:           true,
+			AcceptedMediaTypes: []string{"text/plain", "text/markdown"},
+			Multiple:           true,
+			MaxBytes:           4096,
+		},
+		{
+			Name:        "glossary",
+			Description: "Campaign terms",
+			MaxBytes:    2048,
+		},
+	}
+
+	got := CloneReferenceSlots(slots)
+
+	if !reflect.DeepEqual(got, slots) {
+		t.Fatalf("CloneReferenceSlots() = %#v, want %#v", got, slots)
+	}
+}
+
+func TestCloneReferenceSlotsCopiesAcceptedMediaTypes(t *testing.T) {
+	slots := []ReferenceSlot{
+		{
+			Name:               "party",
+			AcceptedMediaTypes: []string{"application/json", "text/plain"},
+		},
+	}
+
+	got := CloneReferenceSlots(slots)
+	got[0].Name = "changed"
+	got[0].AcceptedMediaTypes[0] = "text/markdown"
+
+	if slots[0].Name != "party" {
+		t.Fatalf("source slot name = %q, want unchanged", slots[0].Name)
+	}
+	if slots[0].AcceptedMediaTypes[0] != "application/json" {
+		t.Fatalf("source AcceptedMediaTypes aliased clone: %#v", slots[0].AcceptedMediaTypes)
+	}
+}
+
+func TestReferenceItemJSONOmitsContent(t *testing.T) {
+	item := ReferenceItem{
+		SlotName:  "roster",
+		MediaType: "text/plain",
+		Content:   []byte("reference content"),
+		Digest:    "sha256:reference",
+		Origin:    ReferenceOrigin{Type: "file", URI: "file:///tmp/roster.txt"},
+	}
+
+	encoded, err := json.Marshal(item)
+	if err != nil {
+		t.Fatalf("json.Marshal() error = %v, want nil", err)
+	}
+
+	var got map[string]any
+	if err := json.Unmarshal(encoded, &got); err != nil {
+		t.Fatalf("json.Unmarshal() error = %v, want nil", err)
+	}
+	if _, ok := got["content"]; ok {
+		t.Fatalf("encoded reference item leaked content: %s", encoded)
+	}
+	if _, ok := got["Content"]; ok {
+		t.Fatalf("encoded reference item leaked Content: %s", encoded)
+	}
+}
+
+func TestLLMInputMaterialCopiesContentAndOmitsContentFromJSON(t *testing.T) {
+	content := []byte("raw source bytes")
+	material := NewLLMInputMaterial("transcript", "application/json", content, "sha256:source", "file:///tmp/source.json")
+	content[0] = 'R'
+	if got := string(material.Content); got != "raw source bytes" {
+		t.Fatalf("material content = %q, want defensive copy", got)
+	}
+	if material.SizeBytes != int64(len("raw source bytes")) {
+		t.Fatalf("SizeBytes = %d, want content length", material.SizeBytes)
+	}
+
+	clone := material.Clone()
+	clone.Content[0] = 'X'
+	if got := string(material.Content); got != "raw source bytes" {
+		t.Fatalf("cloned material content aliased original: %q", got)
+	}
+
+	encoded, err := json.Marshal(material)
+	if err != nil {
+		t.Fatalf("json.Marshal() error = %v, want nil", err)
+	}
+	var got map[string]any
+	if err := json.Unmarshal(encoded, &got); err != nil {
+		t.Fatalf("json.Unmarshal() error = %v, want nil", err)
+	}
+	if _, ok := got["content"]; ok {
+		t.Fatalf("encoded material leaked content: %s", encoded)
+	}
+	if _, ok := got["Content"]; ok {
+		t.Fatalf("encoded material leaked Content: %s", encoded)
+	}
+	if got["digest"] != "sha256:source" || got["origin_uri"] != "file:///tmp/source.json" {
+		t.Fatalf("encoded material = %#v, want non-secret provenance", got)
+	}
+}
+
+func TestLLMInputSetCloneCopiesContent(t *testing.T) {
+	set := LLMInputSet{
+		"transcript": NewLLMInputMaterial("transcript", "application/json", []byte("source"), "sha256:source", "file:///tmp/source.json"),
+	}
+	clone := set.Clone()
+	clone["transcript"].Content[0] = 'S'
+	if got := string(set["transcript"].Content); got != "source" {
+		t.Fatalf("input set clone aliased content: %q", got)
+	}
+}
+
+func TestArtifactSchemaJSONOmitsSchemaContent(t *testing.T) {
+	schema := ArtifactSchema{
+		ID:         "schema-id",
+		Name:       "schema-name",
+		Version:    "v1",
+		JSONSchema: []byte(`{"type":"object"}`),
+	}
+	encoded, err := json.Marshal(schema)
+	if err != nil {
+		t.Fatalf("json.Marshal() error = %v, want nil", err)
+	}
+	var got map[string]any
+	if err := json.Unmarshal(encoded, &got); err != nil {
+		t.Fatalf("json.Unmarshal() error = %v, want nil", err)
+	}
+	if got["id"] != "schema-id" || got["name"] != "schema-name" || got["version"] != "v1" {
+		t.Fatalf("encoded schema = %#v, want schema provenance", got)
+	}
+	if _, ok := got["json_schema"]; ok {
+		t.Fatalf("encoded schema leaked raw schema content: %s", encoded)
+	}
+	if _, ok := got["JSONSchema"]; ok {
+		t.Fatalf("encoded schema leaked raw schema content: %s", encoded)
 	}
 }
 
 func TestFakeMergeNormalizeAndOutputContracts(t *testing.T) {
-	candidate := artifacts.ArtifactCandidate{
-		Index:         0,
-		ExtractorKey:  "generic-extractor",
-		ArtifactType:  "generic-artifact",
-		SchemaVersion: "v1",
-		Payload:       json.RawMessage(`{"value":"example"}`),
-	}
-	chunk := SourceChunk{
-		ID:       "source-1:chunk:0",
-		SourceID: "source-1",
-		Index:    0,
-		Units: []source.SourceUnit{
-			{ID: "u1", Kind: "section", Text: "Source text."},
-		},
-	}
+	extractOutput := ExtractArtifact[fakeArtifact]{LaneID: "generic-lane", ExtractorKey: "generic-extractor", SourceID: "source-1", ChunkID: "source-1:chunk:0", ChunkIndex: 0, Value: fakeArtifact{Value: "example"}}
 	merger := fakeMerger{key: "generic-merger"}
 	normalizer := fakeNormalizer{key: "generic-normalizer"}
 	encoder := fakeOutputEncoder{key: "generic-output"}
 
-	merged, err := merger.Merge(context.Background(), MergeRequest{
-		LaneID: "generic-artifact",
-		ChunkArtifacts: []ChunkArtifacts{
-			{
-				Chunk:      chunk,
-				Candidates: []artifacts.ArtifactCandidate{candidate},
-			},
-		},
+	merged, err := merger.Merge(context.Background(), TypedMergeRequest[fakeArtifact]{
+		LaneID:         "generic-lane",
+		ExtractOutputs: []ExtractArtifact[fakeArtifact]{extractOutput},
 	})
 	if err != nil {
 		t.Fatalf("Merge() error = %v, want nil", err)
@@ -200,13 +352,13 @@ func TestFakeMergeNormalizeAndOutputContracts(t *testing.T) {
 	if merger.Key() != "generic-merger" {
 		t.Fatalf("Merger.Key() = %q, want generic-merger", merger.Key())
 	}
-	if len(merged.Candidates) != 1 {
-		t.Fatalf("len(merged.Candidates) = %d, want 1", len(merged.Candidates))
+	if merged.Value.Value != "example" {
+		t.Fatalf("merged value = %q, want example", merged.Value.Value)
 	}
 
-	normalized, err := normalizer.Normalize(context.Background(), NormalizeRequest{
-		LaneID:     "generic-artifact",
-		Candidates: merged.Candidates,
+	normalized, err := normalizer.Normalize(context.Background(), TypedNormalizeRequest[fakeArtifact]{
+		LaneID:      "generic-lane",
+		MergeOutput: MergeArtifact[fakeArtifact]{LaneID: "generic-lane", MergerKey: merger.Key(), SourceID: "source-1", Value: merged.Value},
 	})
 	if err != nil {
 		t.Fatalf("Normalize() error = %v, want nil", err)
@@ -214,15 +366,13 @@ func TestFakeMergeNormalizeAndOutputContracts(t *testing.T) {
 	if normalizer.Key() != "generic-normalizer" {
 		t.Fatalf("Normalizer.Key() = %q, want generic-normalizer", normalizer.Key())
 	}
-	if len(normalized.Candidates) != 1 {
-		t.Fatalf("len(normalized.Candidates) = %d, want 1", len(normalized.Candidates))
+	if normalized.Value.Value != "example" {
+		t.Fatalf("normalized value = %q, want example", normalized.Value.Value)
 	}
 
 	encoded, err := encoder.Encode(context.Background(), OutputRequest{
-		Manifest: artifacts.RunManifest{RunID: "run-1"},
-		Approved: []artifacts.Artifact{
-			artifacts.ArtifactFromCandidate(normalized.Candidates[0]),
-		},
+		Manifest:         artifacts.RunManifest{RunID: "run-1"},
+		NormalizeOutputs: []SerializedOutput{{LaneID: "generic-lane", NormalizerKey: normalizer.Key(), SourceID: "source-1", Artifact: SerializedArtifact{Kind: "test/artifact", Schema: ArtifactSchema{ID: "schema-id", Name: "schema-name", Version: "v1"}, MediaType: "application/json", Content: []byte(`{"value":"example"}`)}}},
 	})
 	if err != nil {
 		t.Fatalf("Encode() error = %v, want nil", err)
@@ -236,7 +386,7 @@ func TestFakeMergeNormalizeAndOutputContracts(t *testing.T) {
 	if encoded.Files[0].ContentType != "application/json" {
 		t.Fatalf("ContentType = %q, want application/json", encoded.Files[0].ContentType)
 	}
-	if string(encoded.Files[0].Bytes) != `{"run_id":"run-1","approved_count":1}` {
+	if string(encoded.Files[0].Bytes) != `{"run_id":"run-1","output_count":1}` {
 		t.Fatalf("Bytes = %s, want encoded output", encoded.Files[0].Bytes)
 	}
 }
@@ -292,70 +442,68 @@ func (chunker fakeChunker) Key() string {
 	return chunker.key
 }
 
+func (chunker fakeChunker) ReferenceSlots() []ReferenceSlot {
+	return nil
+}
+
 func (chunker fakeChunker) Chunk(ctx context.Context, req ChunkRequest) (ChunkResult, error) {
 	return ChunkResult{
-		Chunks: []SourceChunk{
+		Chunks: []source.Chunk{
 			{
 				ID:       req.Source.ID + ":chunk:0",
 				SourceID: req.Source.ID,
 				Index:    0,
-				Units:    append([]source.SourceUnit(nil), req.Source.Units...),
+				Ref: source.SourceRef{
+					SourceID:    req.Source.ID,
+					StartUnitID: req.Source.Units[0].ID,
+					EndUnitID:   req.Source.Units[len(req.Source.Units)-1].ID,
+				},
+				Content:   []byte(`{"units":[{"id":1,"kind":"section","text":"Source text."}]}`),
+				MediaType: "application/json",
+				Units:     append([]source.SourceUnit(nil), req.Source.Units...),
 			},
 		},
 	}, nil
 }
 
-type fakeExtractor struct {
-	key           string
-	artifactType  string
-	schemaVersion string
-	validators    []Validator
+type recordingChunker struct {
+	key     string
+	request ChunkRequest
 }
 
+func (chunker *recordingChunker) Key() string {
+	return chunker.key
+}
+
+func (chunker *recordingChunker) ReferenceSlots() []ReferenceSlot {
+	return nil
+}
+
+func (chunker *recordingChunker) Chunk(ctx context.Context, req ChunkRequest) (ChunkResult, error) {
+	chunker.request = req
+	return fakeChunker{key: chunker.key}.Chunk(ctx, req)
+}
+
+type fakeExtractor struct {
+	key string
+}
+
+type fakeArtifact struct{ Value string }
+
 func (extractor fakeExtractor) Key() string {
 	return extractor.key
 }
 
-func (extractor fakeExtractor) ArtifactType() string {
-	return extractor.artifactType
+func (extractor fakeExtractor) ReferenceSlots() []ReferenceSlot {
+	return nil
 }
 
-func (extractor fakeExtractor) SchemaVersion() string {
-	return extractor.schemaVersion
-}
-
-func (extractor fakeExtractor) Validators() []Validator {
-	return extractor.validators
-}
-
-func (extractor fakeExtractor) Extract(ctx context.Context, req ExtractionRequest) (ExtractionResult, error) {
-	units := req.Source.Units
-	if req.Chunk != nil {
-		units = req.Chunk.Units
-	}
-	payload := json.RawMessage(`{"value":"example"}`)
+func (extractor fakeExtractor) Extract(ctx context.Context, req TypedExtractionRequest) (TypedExtractionResult[fakeArtifact], error) {
+	value := "example"
 	if req.AmbientContext["mode"] == "chunked" {
-		payload = json.RawMessage(`{"value":"chunked"}`)
+		value = "chunked"
 	}
-
-	return ExtractionResult{
-		Candidates: []artifacts.ArtifactCandidate{
-			{
-				Index:         0,
-				ExtractorKey:  extractor.key,
-				ArtifactType:  extractor.artifactType,
-				SchemaVersion: extractor.schemaVersion,
-				Payload:       payload,
-				SourceRefs: []source.SourceRef{
-					{
-						SourceID:    req.Source.ID,
-						StartUnitID: units[0].ID,
-						EndUnitID:   units[len(units)-1].ID,
-					},
-				},
-			},
-		},
-	}, nil
+	return TypedExtractionResult[fakeArtifact]{Value: fakeArtifact{Value: value}}, nil
 }
 
 type fakeMerger struct {
@@ -366,13 +514,8 @@ func (merger fakeMerger) Key() string {
 	return merger.key
 }
 
-func (merger fakeMerger) Merge(ctx context.Context, req MergeRequest) (MergeResult, error) {
-	var candidates []artifacts.ArtifactCandidate
-	for _, chunkArtifacts := range req.ChunkArtifacts {
-		candidates = append(candidates, chunkArtifacts.Candidates...)
-	}
-
-	return MergeResult{Candidates: candidates}, nil
+func (merger fakeMerger) Merge(ctx context.Context, req TypedMergeRequest[fakeArtifact]) (TypedMergeResult[fakeArtifact], error) {
+	return TypedMergeResult[fakeArtifact]{Value: req.ExtractOutputs[0].Value}, nil
 }
 
 type fakeNormalizer struct {
@@ -383,33 +526,12 @@ func (normalizer fakeNormalizer) Key() string {
 	return normalizer.key
 }
 
-func (normalizer fakeNormalizer) Normalize(ctx context.Context, req NormalizeRequest) (NormalizeResult, error) {
-	return NormalizeResult{Candidates: req.Candidates}, nil
+func (normalizer fakeNormalizer) ReferenceSlots() []ReferenceSlot {
+	return nil
 }
 
-type fakeValidator struct {
-	name string
-}
-
-func (validator fakeValidator) Name() string {
-	return validator.name
-}
-
-func (validator fakeValidator) Validate(ctx context.Context, req ValidationRequest) (ValidationResult, error) {
-	decisions := make([]ValidationDecision, 0, len(req.Candidates))
-	for _, candidate := range req.Candidates {
-		decisions = append(decisions, ValidationDecision{
-			CandidateIndex: candidate.Index,
-			Approved:       true,
-			ReasonCode:     "accepted",
-			Message:        "candidate accepted",
-		})
-	}
-
-	return ValidationResult{
-		ValidatorName: validator.name,
-		Decisions:     decisions,
-	}, nil
+func (normalizer fakeNormalizer) Normalize(ctx context.Context, req TypedNormalizeRequest[fakeArtifact]) (TypedNormalizeResult[fakeArtifact], error) {
+	return TypedNormalizeResult[fakeArtifact]{Value: req.MergeOutput.Value}, nil
 }
 
 type fakeLLMClient struct{}
@@ -434,7 +556,7 @@ func (encoder fakeOutputEncoder) Encode(ctx context.Context, req OutputRequest)
 			{
 				Name:        "artifacts/generic.json",
 				ContentType: "application/json",
-				Bytes:       []byte(`{"run_id":"` + req.Manifest.RunID + `","approved_count":1}`),
+				Bytes:       []byte(`{"run_id":"` + req.Manifest.RunID + `","output_count":1}`),
 			},
 		},
 	}, nil

internal/framework/contracts/typed_pipeline.go

@@ -0,0 +1,164 @@
+package contracts
+
+import (
+	"context"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+)
+
+// ExtractArtifact carries a typed per-chunk value with framework provenance.
+type ExtractArtifact[T any] struct {
+	LaneID       string
+	ExtractorKey string
+	SourceID     string
+	ChunkID      string
+	ChunkIndex   int
+	ChunkRef     source.SourceRef
+	Value        T
+}
+
+// MergeArtifact carries a typed merged value with framework provenance.
+type MergeArtifact[T any] struct {
+	LaneID    string
+	MergerKey string
+	SourceID  string
+	Value     T
+}
+
+// NormalizeArtifact carries a typed normalized value with framework provenance.
+type NormalizeArtifact[T any] struct {
+	LaneID        string
+	NormalizerKey string
+	SourceID      string
+	Value         T
+}
+
+type TypedExtractionRequest struct {
+	Source         *source.SourceDocument
+	Chunk          *source.Chunk
+	AmbientContext map[string]any
+	SourceInput    LLMInputMaterial
+	SessionID      string
+	References     ReferenceSet
+	LLMProfile     string
+	Metadata       map[string]any
+}
+
+type TypedExtractionResult[T any] struct {
+	Value    T
+	Warnings []Warning
+}
+
+type Extractor[T any] interface {
+	Key() string
+	ReferenceSlots() []ReferenceSlot
+	Extract(context.Context, TypedExtractionRequest) (TypedExtractionResult[T], error)
+}
+
+type TypedMergeRequest[T any] struct {
+	Source         *source.SourceDocument
+	LaneID         string
+	ExtractOutputs []ExtractArtifact[T]
+	SourceInput    LLMInputMaterial
+	SessionID      string
+	References     ReferenceSet
+	LLMProfile     string
+	Metadata       map[string]any
+}
+
+type TypedMergeResult[T any] struct {
+	Value    T
+	Warnings []Warning
+}
+
+type Merger[T any] interface {
+	Key() string
+	Merge(context.Context, TypedMergeRequest[T]) (TypedMergeResult[T], error)
+}
+
+type TypedNormalizeRequest[T any] struct {
+	Source      *source.SourceDocument
+	LaneID      string
+	MergeOutput MergeArtifact[T]
+	SourceInput LLMInputMaterial
+	SessionID   string
+	References  ReferenceSet
+	LLMProfile  string
+	Metadata    map[string]any
+}
+
+type TypedNormalizeResult[T any] struct {
+	Value    T
+	Warnings []Warning
+}
+
+type Normalizer[T any] interface {
+	Key() string
+	ReferenceSlots() []ReferenceSlot
+	Normalize(context.Context, TypedNormalizeRequest[T]) (TypedNormalizeResult[T], error)
+}
+
+type TypedValidationRequest[T any] struct {
+	Stage       string
+	LaneID      string
+	ModuleKey   string
+	Source      *source.SourceDocument
+	SourceID    string
+	SourceInput LLMInputMaterial
+	SessionID   string
+	References  ReferenceSet
+	LLMProfile  string
+	Metadata    map[string]any
+	Chunk       *source.Chunk
+	Chunks      []source.Chunk
+	Ref         source.SourceRef
+	Value       T
+}
+
+type TypedValidator[T any] interface {
+	Name() string
+	ExecutionClass() ExecutionClass
+	Validate(context.Context, TypedValidationRequest[T]) (ValidationResult, error)
+}
+
+type ChunkValidationRequest struct {
+	ModuleKey   string
+	Source      *source.SourceDocument
+	SourceID    string
+	SourceInput LLMInputMaterial
+	SessionID   string
+	References  ReferenceSet
+	LLMProfile  string
+	Metadata    map[string]any
+	Chunks      []source.Chunk
+}
+
+type ChunkValidator interface {
+	Name() string
+	ExecutionClass() ExecutionClass
+	Validate(context.Context, ChunkValidationRequest) (ValidationResult, error)
+}
+
+type SerializedValidationRequest struct {
+	Stage       string
+	LaneID      string
+	ModuleKey   string
+	Source      *source.SourceDocument
+	SourceID    string
+	SourceInput LLMInputMaterial
+	SessionID   string
+	References  ReferenceSet
+	LLMProfile  string
+	Metadata    map[string]any
+	Chunk       *source.Chunk
+	Chunks      []source.Chunk
+	Schema      ArtifactSchema
+	MediaType   string
+	Content     []byte
+}
+
+type SerializedValidator interface {
+	Name() string
+	ExecutionClass() ExecutionClass
+	Validate(context.Context, SerializedValidationRequest) (ValidationResult, error)
+}

internal/framework/debug/recorder.go

@@ -0,0 +1,41 @@
+package debug
+
+import (
+	"strings"
+
+	coreworkspace "gitea.maximumdirect.net/eric/notarius/internal/core/workspace"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+type WorkspaceRecorder struct {
+	root string
+}
+
+func NewWorkspaceRecorder(settings coreworkspace.Settings, runID string) (pipeline.DebugRecorder, error) {
+	root, err := settings.DebugRunDirectory(runID)
+	if err != nil {
+		return nil, err
+	}
+	if strings.TrimSpace(root) == "" {
+		return pipeline.NoopDebugRecorder(), nil
+	}
+	return &WorkspaceRecorder{root: root}, nil
+}
+
+func (r *WorkspaceRecorder) Enabled() bool {
+	return r != nil && strings.TrimSpace(r.root) != ""
+}
+
+func (r *WorkspaceRecorder) WriteJSON(name string, payload any) error {
+	if !r.Enabled() {
+		return nil
+	}
+	return coreworkspace.WriteJSON(r.root, name, payload)
+}
+
+func (r *WorkspaceRecorder) WriteBytes(name string, data []byte) error {
+	if !r.Enabled() {
+		return nil
+	}
+	return coreworkspace.WriteBytes(r.root, name, data)
+}

internal/framework/llm/asset_registry.go

@@ -0,0 +1,333 @@
+package llm
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"io/fs"
+	"path"
+	"sort"
+	"strings"
+	"time"
+
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+type AssetSource struct {
+	FS   fs.FS
+	Root string
+}
+
+type AssetRegistry struct {
+	prompts []AssetSource
+	schemas []AssetSource
+}
+
+type AssetHashPart struct {
+	FS   fs.FS
+	Path string
+}
+
+func NewAssetRegistry() *AssetRegistry {
+	return &AssetRegistry{}
+}
+
+func (r *AssetRegistry) RegisterPromptFS(fsys fs.FS, root string) error {
+	if r == nil {
+		return fmt.Errorf("asset registry must not be nil")
+	}
+	source, err := newAssetSource(fsys, root)
+	if err != nil {
+		return fmt.Errorf("register prompt assets: %w", err)
+	}
+	r.prompts = append(r.prompts, source)
+	return nil
+}
+
+func (r *AssetRegistry) RegisterSchemaFS(fsys fs.FS, root string) error {
+	if r == nil {
+		return fmt.Errorf("asset registry must not be nil")
+	}
+	source, err := newAssetSource(fsys, root)
+	if err != nil {
+		return fmt.Errorf("register schema assets: %w", err)
+	}
+	r.schemas = append(r.schemas, source)
+	return nil
+}
+
+func (r *AssetRegistry) PromptFS() (fs.FS, error) {
+	if r == nil {
+		return nil, fmt.Errorf("asset registry must not be nil")
+	}
+	return flattenAssetSources(r.prompts)
+}
+
+func (r *AssetRegistry) SchemaFS() (fs.FS, error) {
+	if r == nil {
+		return nil, fmt.Errorf("asset registry must not be nil")
+	}
+	return flattenAssetSources(r.schemas)
+}
+
+func (r *AssetRegistry) ScriptoriumOptions() ([]scriptorium.Option, error) {
+	promptFS, err := r.PromptFS()
+	if err != nil {
+		return nil, fmt.Errorf("prepare prompt assets: %w", err)
+	}
+	schemaFS, err := r.SchemaFS()
+	if err != nil {
+		return nil, fmt.Errorf("prepare schema assets: %w", err)
+	}
+	return []scriptorium.Option{
+		scriptorium.WithPromptFS(promptFS, "."),
+		scriptorium.WithSchemaFS(schemaFS, "."),
+	}, nil
+}
+
+func HashAssets(parts []AssetHashPart) (string, error) {
+	if len(parts) == 0 {
+		return "", fmt.Errorf("asset hash requires at least one part")
+	}
+	hash := sha256.New()
+	for _, part := range parts {
+		cleanPath, err := cleanAssetPath(part.Path)
+		if err != nil {
+			return "", fmt.Errorf("hash asset %q: %w", part.Path, err)
+		}
+		data, err := fs.ReadFile(part.FS, cleanPath)
+		if err != nil {
+			return "", fmt.Errorf("read hash asset %s: %w", cleanPath, err)
+		}
+		if _, err := io.WriteString(hash, cleanPath); err != nil {
+			return "", err
+		}
+		if _, err := hash.Write([]byte{0}); err != nil {
+			return "", err
+		}
+		if _, err := hash.Write(data); err != nil {
+			return "", err
+		}
+		if _, err := hash.Write([]byte{0}); err != nil {
+			return "", err
+		}
+	}
+	return "sha256:" + hex.EncodeToString(hash.Sum(nil)), nil
+}
+
+func newAssetSource(fsys fs.FS, root string) (AssetSource, error) {
+	if fsys == nil {
+		return AssetSource{}, fmt.Errorf("filesystem must not be nil")
+	}
+	cleanRoot, err := cleanAssetRoot(root)
+	if err != nil {
+		return AssetSource{}, err
+	}
+	return AssetSource{FS: fsys, Root: cleanRoot}, nil
+}
+
+func flattenAssetSources(sources []AssetSource) (fs.FS, error) {
+	out := assetMapFS{}
+	for _, source := range sources {
+		if err := fs.WalkDir(source.FS, source.Root, func(name string, entry fs.DirEntry, walkErr error) error {
+			if walkErr != nil {
+				return walkErr
+			}
+			if entry.IsDir() {
+				return nil
+			}
+			rel := name
+			if source.Root != "." {
+				rel = strings.TrimPrefix(name, source.Root+"/")
+			}
+			rel, err := cleanAssetPath(rel)
+			if err != nil {
+				return err
+			}
+			if _, exists := out[rel]; exists {
+				return fmt.Errorf("duplicate asset path %q", rel)
+			}
+			data, err := fs.ReadFile(source.FS, name)
+			if err != nil {
+				return err
+			}
+			out[rel] = append([]byte(nil), data...)
+			return nil
+		}); err != nil {
+			return nil, fmt.Errorf("walk asset root %s: %w", source.Root, err)
+		}
+	}
+	return out, nil
+}
+
+func cleanAssetRoot(root string) (string, error) {
+	trimmed := strings.TrimSpace(root)
+	if trimmed == "" || trimmed == "." {
+		return ".", nil
+	}
+	return cleanAssetPath(trimmed)
+}
+
+func cleanAssetPath(name string) (string, error) {
+	trimmed := strings.TrimSpace(name)
+	if trimmed == "" {
+		return "", fmt.Errorf("path must not be empty")
+	}
+	cleaned := path.Clean(strings.TrimPrefix(trimmed, "/"))
+	if cleaned == "." || !fs.ValidPath(cleaned) {
+		return "", fmt.Errorf("invalid path %q", name)
+	}
+	return cleaned, nil
+}
+
+type assetMapFS map[string][]byte
+
+func (m assetMapFS) Open(name string) (fs.File, error) {
+	cleaned, err := cleanOpenPath(name)
+	if err != nil {
+		return nil, &fs.PathError{Op: "open", Path: name, Err: err}
+	}
+	if data, ok := m[cleaned]; ok {
+		return &assetFile{
+			reader: bytes.NewReader(data),
+			info:   assetFileInfo{name: path.Base(cleaned), size: int64(len(data))},
+		}, nil
+	}
+	entries := m.dirEntries(cleaned)
+	if entries != nil {
+		return &assetDir{name: path.Base(cleaned), entries: entries}, nil
+	}
+	return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrNotExist}
+}
+
+func (m assetMapFS) ReadFile(name string) ([]byte, error) {
+	cleaned, err := cleanOpenPath(name)
+	if err != nil {
+		return nil, &fs.PathError{Op: "readfile", Path: name, Err: err}
+	}
+	data, ok := m[cleaned]
+	if !ok {
+		return nil, &fs.PathError{Op: "readfile", Path: name, Err: fs.ErrNotExist}
+	}
+	return append([]byte(nil), data...), nil
+}
+
+func (m assetMapFS) ReadDir(name string) ([]fs.DirEntry, error) {
+	cleaned, err := cleanOpenPath(name)
+	if err != nil {
+		return nil, &fs.PathError{Op: "readdir", Path: name, Err: err}
+	}
+	entries := m.dirEntries(cleaned)
+	if entries == nil {
+		return nil, &fs.PathError{Op: "readdir", Path: name, Err: fs.ErrNotExist}
+	}
+	return entries, nil
+}
+
+func (m assetMapFS) dirEntries(dir string) []fs.DirEntry {
+	children := map[string]assetDirEntry{}
+	prefix := ""
+	if dir != "." {
+		prefix = dir + "/"
+	}
+	for name, data := range m {
+		if !strings.HasPrefix(name, prefix) {
+			continue
+		}
+		rest := strings.TrimPrefix(name, prefix)
+		if rest == "" {
+			continue
+		}
+		childName, _, hasSlash := strings.Cut(rest, "/")
+		entry := assetDirEntry{name: childName, dir: hasSlash}
+		if !hasSlash {
+			entry.size = int64(len(data))
+		}
+		children[childName] = entry
+	}
+	if len(children) == 0 {
+		return nil
+	}
+	names := make([]string, 0, len(children))
+	for name := range children {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	entries := make([]fs.DirEntry, 0, len(names))
+	for _, name := range names {
+		entries = append(entries, children[name])
+	}
+	return entries
+}
+
+func cleanOpenPath(name string) (string, error) {
+	if name == "." {
+		return ".", nil
+	}
+	return cleanAssetPath(name)
+}
+
+type assetFile struct {
+	reader *bytes.Reader
+	info   assetFileInfo
+}
+
+func (f *assetFile) Stat() (fs.FileInfo, error) { return f.info, nil }
+func (f *assetFile) Read(p []byte) (int, error) { return f.reader.Read(p) }
+func (f *assetFile) Close() error               { return nil }
+
+type assetDir struct {
+	name    string
+	offset  int
+	entries []fs.DirEntry
+}
+
+func (d *assetDir) Stat() (fs.FileInfo, error) { return assetFileInfo{name: d.name, dir: true}, nil }
+func (d *assetDir) Read([]byte) (int, error)   { return 0, fmt.Errorf("cannot read directory") }
+func (d *assetDir) Close() error               { return nil }
+func (d *assetDir) ReadDir(n int) ([]fs.DirEntry, error) {
+	if d.offset >= len(d.entries) {
+		return nil, io.EOF
+	}
+	end := len(d.entries)
+	if n > 0 && d.offset+n < end {
+		end = d.offset + n
+	}
+	out := append([]fs.DirEntry(nil), d.entries[d.offset:end]...)
+	d.offset = end
+	return out, nil
+}
+
+type assetDirEntry struct {
+	name string
+	dir  bool
+	size int64
+}
+
+func (e assetDirEntry) Name() string      { return e.name }
+func (e assetDirEntry) IsDir() bool       { return e.dir }
+func (e assetDirEntry) Type() fs.FileMode { return e.InfoMode().Type() }
+func (e assetDirEntry) Info() (fs.FileInfo, error) {
+	return assetFileInfo{name: e.name, dir: e.dir, size: e.size}, nil
+}
+func (e assetDirEntry) InfoMode() fs.FileMode {
+	if e.dir {
+		return fs.ModeDir | 0o555
+	}
+	return 0o444
+}
+
+type assetFileInfo struct {
+	name string
+	dir  bool
+	size int64
+}
+
+func (i assetFileInfo) Name() string       { return i.name }
+func (i assetFileInfo) Size() int64        { return i.size }
+func (i assetFileInfo) Mode() fs.FileMode  { return assetDirEntry{dir: i.dir}.InfoMode() }
+func (i assetFileInfo) ModTime() time.Time { return time.Time{} }
+func (i assetFileInfo) IsDir() bool        { return i.dir }
+func (i assetFileInfo) Sys() any           { return nil }

internal/framework/llm/asset_registry_test.go

@@ -0,0 +1,198 @@
+package llm
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"testing/fstest"
+	"time"
+
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+func TestAssetRegistryCombinesPromptAndSchemaSources(t *testing.T) {
+	registry := NewAssetRegistry()
+	mustRegisterPromptFS(t, registry, fstest.MapFS{
+		"prompts/test.yaml":           {Data: []byte(validPromptYAML("schemas/out.json"))},
+		"prompts/messages/user.tmpl":  {Data: []byte(`Input: {{ input "transcript" }}`)},
+		"prompts/messages/task.tmpl":  {Data: []byte("Return JSON.")},
+		"schemas/ignored/schema.json": {Data: []byte(`{"type":"object"}`)},
+	}, "prompts")
+	mustRegisterSchemaFS(t, registry, fstest.MapFS{
+		"root/schemas/out.json": {Data: []byte(`{"type":"object"}`)},
+	}, "root")
+
+	engine := newAssetTestEngine(t, registry)
+	prepared, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
+		PromptID:  "asset.test",
+		ProfileID: "asset-test-profile",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.Inline(`{"ok":true}`),
+		},
+	})
+	if err != nil {
+		t.Fatalf("Prepare() error = %v, want nil", err)
+	}
+	if got := len(prepared.Messages); got != 2 {
+		t.Fatalf("message count = %d, want 2", got)
+	}
+	if prepared.OutputContract.SchemaPath != "schemas/out.json" {
+		t.Fatalf("schema path = %q, want schemas/out.json", prepared.OutputContract.SchemaPath)
+	}
+}
+
+func TestAssetRegistryPrepareFailsForMissingPromptAsset(t *testing.T) {
+	registry := NewAssetRegistry()
+	mustRegisterPromptFS(t, registry, fstest.MapFS{
+		"test.yaml": {Data: []byte(validPromptYAML("out.json"))},
+	}, ".")
+	mustRegisterSchemaFS(t, registry, fstest.MapFS{
+		"out.json": {Data: []byte(`{"type":"object"}`)},
+	}, ".")
+
+	engine := newAssetTestEngine(t, registry)
+	_, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
+		PromptID:  "asset.test",
+		ProfileID: "asset-test-profile",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.Inline(`{"ok":true}`),
+		},
+	})
+	if err == nil || !strings.Contains(err.Error(), "content_file") {
+		t.Fatalf("Prepare() error = %v, want missing content_file error", err)
+	}
+}
+
+func TestAssetRegistryPrepareFailsForMissingSchemaAsset(t *testing.T) {
+	registry := NewAssetRegistry()
+	mustRegisterPromptFS(t, registry, fstest.MapFS{
+		"test.yaml":          {Data: []byte(validPromptYAML("missing.json"))},
+		"messages/user.tmpl": {Data: []byte(`Input: {{ input "transcript" }}`)},
+		"messages/task.tmpl": {Data: []byte("Return JSON.")},
+	}, ".")
+	mustRegisterSchemaFS(t, registry, fstest.MapFS{
+		"present.json": {Data: []byte(`{"type":"object"}`)},
+	}, ".")
+
+	engine := newAssetTestEngine(t, registry)
+	_, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
+		PromptID:  "asset.test",
+		ProfileID: "asset-test-profile",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.Inline(`{"ok":true}`),
+		},
+	})
+	if err == nil || !strings.Contains(err.Error(), "missing.json") {
+		t.Fatalf("Prepare() error = %v, want missing schema error", err)
+	}
+}
+
+func TestAssetRegistryRejectsDuplicateAssetPaths(t *testing.T) {
+	registry := NewAssetRegistry()
+	mustRegisterPromptFS(t, registry, fstest.MapFS{"one/prompt.yaml": {Data: []byte("id: one")}}, "one")
+	mustRegisterPromptFS(t, registry, fstest.MapFS{"two/prompt.yaml": {Data: []byte("id: two")}}, "two")
+
+	_, err := registry.PromptFS()
+	if err == nil || !strings.Contains(err.Error(), "duplicate asset path") {
+		t.Fatalf("PromptFS() error = %v, want duplicate path error", err)
+	}
+}
+
+func TestAssetRegistryCombinesNamespacedPromptSources(t *testing.T) {
+	registry := NewAssetRegistry()
+	mustRegisterPromptFS(t, registry, fstest.MapFS{
+		"dnd.spells/dnd.spells.yaml": {Data: []byte(validPromptYAML("schema.json"))},
+		"dnd.spells/task.md":         {Data: []byte("spell task")},
+		"dnd.spells/instructions.md": {Data: []byte("spell instructions")},
+	}, ".")
+	mustRegisterPromptFS(t, registry, fstest.MapFS{
+		"dnd.scenes/dnd.scenes.yaml": {Data: []byte(validPromptYAML("schema.json"))},
+		"dnd.scenes/task.md":         {Data: []byte("scene task")},
+		"dnd.scenes/instructions.md": {Data: []byte("scene instructions")},
+	}, ".")
+
+	fsys, err := registry.PromptFS()
+	if err != nil {
+		t.Fatalf("PromptFS() error = %v, want nil", err)
+	}
+	for _, name := range []string{
+		"dnd.spells/dnd.spells.yaml",
+		"dnd.spells/task.md",
+		"dnd.spells/instructions.md",
+		"dnd.scenes/dnd.scenes.yaml",
+		"dnd.scenes/task.md",
+		"dnd.scenes/instructions.md",
+	} {
+		if _, err := fsys.Open(name); err != nil {
+			t.Fatalf("PromptFS().Open(%q) error = %v, want nil", name, err)
+		}
+	}
+}
+
+func TestHashAssetsOmitsRawAssetContent(t *testing.T) {
+	hash, err := HashAssets([]AssetHashPart{{
+		FS:   fstest.MapFS{"prompt.md": {Data: []byte("secret prompt text")}},
+		Path: "prompt.md",
+	}})
+	if err != nil {
+		t.Fatalf("HashAssets() error = %v, want nil", err)
+	}
+	if !strings.HasPrefix(hash, "sha256:") {
+		t.Fatalf("hash = %q, want sha256-prefixed value", hash)
+	}
+	if strings.Contains(hash, "secret prompt text") {
+		t.Fatalf("hash leaked asset content")
+	}
+}
+
+func newAssetTestEngine(t *testing.T, registry *AssetRegistry) *scriptorium.Engine {
+	t.Helper()
+	options, err := registry.ScriptoriumOptions()
+	if err != nil {
+		t.Fatalf("ScriptoriumOptions() error = %v, want nil", err)
+	}
+	options = append(options, scriptorium.WithProfiles(scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
+		ID:       "asset-test-profile",
+		Endpoint: "http://127.0.0.1:1/v1",
+		Model:    "asset-test-model",
+	})))
+	engine, err := scriptorium.NewEngine(scriptorium.Config{Timeout: time.Second}, options...)
+	if err != nil {
+		t.Fatalf("NewEngine() error = %v, want nil", err)
+	}
+	return engine
+}
+
+func mustRegisterPromptFS(t *testing.T, registry *AssetRegistry, fsys fstest.MapFS, root string) {
+	t.Helper()
+	if err := registry.RegisterPromptFS(fsys, root); err != nil {
+		t.Fatalf("RegisterPromptFS() error = %v, want nil", err)
+	}
+}
+
+func mustRegisterSchemaFS(t *testing.T, registry *AssetRegistry, fsys fstest.MapFS, root string) {
+	t.Helper()
+	if err := registry.RegisterSchemaFS(fsys, root); err != nil {
+		t.Fatalf("RegisterSchemaFS() error = %v, want nil", err)
+	}
+}
+
+func validPromptYAML(schemaPath string) string {
+	return `id: asset.test
+version: "v1"
+inputs:
+  - name: transcript
+    required: true
+    content_type: application/json
+messages:
+  - role: user
+    content_file: ./messages/user.tmpl
+  - role: user
+    content_file: ./messages/task.tmpl
+output:
+  format: json
+  validation_mode: json_schema
+  schema_path: ` + schemaPath + `
+  repair_attempts: 0
+`
+}

internal/framework/llm/openai_compatible_client.go

@@ -1,364 +0,0 @@
-package llm
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"strings"
-	"time"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-)
-
-const openAICompatibleProviderName = "openai-compatible"
-
-// OpenAICompatibleClientConfig configures the direct HTTP structured-output adapter.
-type OpenAICompatibleClientConfig struct {
-	BaseURL        string
-	Model          string
-	APIKey         string
-	MaxRetries     int
-	HTTPClient     *http.Client
-	RequestTimeout time.Duration
-}
-
-// OpenAICompatibleClient sends OpenAI-compatible chat-completion requests with
-// response_format.type=json_schema.
-type OpenAICompatibleClient struct {
-	baseURL        string
-	model          string
-	apiKey         string
-	maxRetries     int
-	httpClient     *http.Client
-	requestTimeout time.Duration
-}
-
-var _ contracts.StructuredLLMClient = (*OpenAICompatibleClient)(nil)
-
-func NewOpenAICompatibleClient(cfg OpenAICompatibleClientConfig) (*OpenAICompatibleClient, error) {
-	normalized, err := normalizeOpenAICompatibleConfig(cfg)
-	if err != nil {
-		return nil, err
-	}
-
-	client := normalized.HTTPClient
-	if client == nil {
-		client = http.DefaultClient
-	}
-
-	return &OpenAICompatibleClient{
-		baseURL:        normalized.BaseURL,
-		model:          normalized.Model,
-		apiKey:         normalized.APIKey,
-		maxRetries:     normalized.MaxRetries,
-		httpClient:     client,
-		requestTimeout: normalized.RequestTimeout,
-	}, nil
-}
-
-func (c *OpenAICompatibleClient) CompleteStructured(
-	ctx context.Context,
-	req contracts.StructuredCompletionRequest,
-	out any,
-) (contracts.StructuredCompletionResponse, error) {
-	if c == nil {
-		return contracts.StructuredCompletionResponse{}, fmt.Errorf("openai-compatible client must not be nil")
-	}
-	if err := validateOutputTarget(out); err != nil {
-		return contracts.StructuredCompletionResponse{}, err
-	}
-
-	model := strings.TrimSpace(req.Model)
-	if model == "" {
-		model = c.model
-	}
-	if model == "" {
-		return contracts.StructuredCompletionResponse{}, fmt.Errorf("structured completion model must not be empty")
-	}
-
-	schemaName := strings.TrimSpace(req.ResponseSchemaName)
-	if schemaName == "" {
-		return contracts.StructuredCompletionResponse{}, fmt.Errorf("structured completion response schema name must not be empty")
-	}
-	if len(bytes.TrimSpace(req.ResponseSchema)) == 0 || !json.Valid(req.ResponseSchema) {
-		return contracts.StructuredCompletionResponse{}, fmt.Errorf("structured completion response schema JSON must be valid")
-	}
-
-	messages, err := toOpenAICompatibleMessages(req.Messages)
-	if err != nil {
-		return contracts.StructuredCompletionResponse{}, err
-	}
-
-	endpoint := buildChatCompletionsURL(c.baseURL)
-	var lastErr error
-	for attempt := 0; attempt <= c.maxRetries; attempt++ {
-		content, metadata, callErr := c.completeStructuredOnce(ctx, endpoint, model, messages, schemaName, req.ResponseSchema)
-		if callErr == nil {
-			if decodeErr := json.Unmarshal(content, out); decodeErr != nil {
-				callErr = retryableError{err: fmt.Errorf("decode structured output: %w", decodeErr)}
-			} else {
-				return contracts.StructuredCompletionResponse{
-					Content:          content,
-					Provider:         openAICompatibleProviderName,
-					Model:            firstNonEmpty(metadata.Model, model),
-					PromptTokens:     metadata.PromptTokens,
-					CompletionTokens: metadata.CompletionTokens,
-					TotalTokens:      metadata.TotalTokens,
-				}, nil
-			}
-		}
-
-		if ctx.Err() != nil {
-			return contracts.StructuredCompletionResponse{}, ctx.Err()
-		}
-		lastErr = c.redactError(callErr)
-		if !canRetry(ctx, attempt, c.maxRetries, callErr) {
-			return contracts.StructuredCompletionResponse{}, lastErr
-		}
-	}
-
-	if lastErr == nil {
-		lastErr = fmt.Errorf("structured completion failed")
-	}
-	return contracts.StructuredCompletionResponse{}, lastErr
-}
-
-type openAICompatibleMessage struct {
-	Role    string `json:"role"`
-	Content string `json:"content"`
-}
-
-type openAICompatibleRequest struct {
-	Model          string                                `json:"model"`
-	Messages       []openAICompatibleMessage             `json:"messages"`
-	ResponseFormat openAICompatibleStructuredOutputShape `json:"response_format"`
-}
-
-type openAICompatibleStructuredOutputShape struct {
-	Type       string                         `json:"type"`
-	JSONSchema openAICompatibleSchemaEnvelope `json:"json_schema"`
-}
-
-type openAICompatibleSchemaEnvelope struct {
-	Name   string          `json:"name"`
-	Strict bool            `json:"strict"`
-	Schema json.RawMessage `json:"schema"`
-}
-
-type openAICompatibleChatCompletionsResponse struct {
-	Model   string `json:"model"`
-	Choices []struct {
-		Message struct {
-			Content json.RawMessage `json:"content"`
-		} `json:"message"`
-	} `json:"choices"`
-	Usage *openAICompatibleUsage `json:"usage,omitempty"`
-}
-
-type openAICompatibleUsage struct {
-	PromptTokens     int `json:"prompt_tokens"`
-	CompletionTokens int `json:"completion_tokens"`
-	TotalTokens      int `json:"total_tokens"`
-}
-
-type openAICompatibleResponseMetadata struct {
-	Model            string
-	PromptTokens     int
-	CompletionTokens int
-	TotalTokens      int
-}
-
-func normalizeOpenAICompatibleConfig(cfg OpenAICompatibleClientConfig) (OpenAICompatibleClientConfig, error) {
-	cfg.BaseURL = strings.TrimSpace(cfg.BaseURL)
-	cfg.Model = strings.TrimSpace(cfg.Model)
-	cfg.APIKey = strings.TrimSpace(cfg.APIKey)
-	if cfg.MaxRetries < 0 {
-		return OpenAICompatibleClientConfig{}, fmt.Errorf("max retries must be zero or greater")
-	}
-	if cfg.BaseURL == "" {
-		return OpenAICompatibleClientConfig{}, fmt.Errorf("base URL must not be empty")
-	}
-	if _, err := url.ParseRequestURI(cfg.BaseURL); err != nil {
-		return OpenAICompatibleClientConfig{}, fmt.Errorf("base URL must be valid: %w", err)
-	}
-	if cfg.Model == "" {
-		return OpenAICompatibleClientConfig{}, fmt.Errorf("model must not be empty")
-	}
-	cfg.BaseURL = strings.TrimRight(cfg.BaseURL, "/")
-	return cfg, nil
-}
-
-func (c *OpenAICompatibleClient) completeStructuredOnce(
-	ctx context.Context,
-	endpoint string,
-	model string,
-	messages []openAICompatibleMessage,
-	responseSchemaName string,
-	responseSchemaJSON json.RawMessage,
-) (json.RawMessage, openAICompatibleResponseMetadata, error) {
-	requestCtx := ctx
-	var cancel context.CancelFunc
-	if c.requestTimeout > 0 {
-		requestCtx, cancel = context.WithTimeout(ctx, c.requestTimeout)
-		defer cancel()
-	}
-
-	requestBody := openAICompatibleRequest{
-		Model:    model,
-		Messages: messages,
-		ResponseFormat: openAICompatibleStructuredOutputShape{
-			Type: "json_schema",
-			JSONSchema: openAICompatibleSchemaEnvelope{
-				Name:   responseSchemaName,
-				Strict: true,
-				Schema: responseSchemaJSON,
-			},
-		},
-	}
-
-	payload, err := json.Marshal(requestBody)
-	if err != nil {
-		return nil, openAICompatibleResponseMetadata{}, fmt.Errorf("marshal provider request: %w", err)
-	}
-
-	httpReq, err := http.NewRequestWithContext(requestCtx, http.MethodPost, endpoint, bytes.NewReader(payload))
-	if err != nil {
-		return nil, openAICompatibleResponseMetadata{}, fmt.Errorf("build provider request: %w", err)
-	}
-	httpReq.Header.Set("Content-Type", "application/json")
-	if c.apiKey != "" {
-		httpReq.Header.Set("Authorization", "Bearer "+c.apiKey)
-	}
-
-	httpResp, err := c.httpClient.Do(httpReq)
-	if err != nil {
-		return nil, openAICompatibleResponseMetadata{}, retryableError{err: fmt.Errorf("provider request failed: %w", err)}
-	}
-	defer func() {
-		_ = httpResp.Body.Close()
-	}()
-
-	rawResp, err := io.ReadAll(httpResp.Body)
-	if err != nil {
-		return nil, openAICompatibleResponseMetadata{}, retryableError{err: fmt.Errorf("read provider response: %w", err)}
-	}
-
-	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {
-		statusErr := parseProviderErrorBody(httpResp.StatusCode, rawResp)
-		if httpResp.StatusCode == http.StatusTooManyRequests || httpResp.StatusCode >= 500 {
-			return nil, openAICompatibleResponseMetadata{}, retryableError{err: statusErr}
-		}
-		return nil, openAICompatibleResponseMetadata{}, statusErr
-	}
-
-	return decodeChatCompletionsResponse(rawResp)
-}
-
-func toOpenAICompatibleMessages(messages []contracts.LLMMessage) ([]openAICompatibleMessage, error) {
-	if len(messages) == 0 {
-		return nil, fmt.Errorf("structured completion messages must not be empty")
-	}
-
-	result := make([]openAICompatibleMessage, len(messages))
-	for i, message := range messages {
-		role := strings.TrimSpace(message.Role)
-		content := strings.TrimSpace(message.Content)
-		if role == "" {
-			return nil, fmt.Errorf("message[%d] role must not be empty", i)
-		}
-		if content == "" {
-			return nil, fmt.Errorf("message[%d] content must not be empty", i)
-		}
-		result[i] = openAICompatibleMessage{
-			Role:    role,
-			Content: content,
-		}
-	}
-	return result, nil
-}
-
-func buildChatCompletionsURL(baseURL string) string {
-	return strings.TrimRight(baseURL, "/") + "/chat/completions"
-}
-
-func decodeChatCompletionsResponse(raw []byte) (json.RawMessage, openAICompatibleResponseMetadata, error) {
-	var parsed openAICompatibleChatCompletionsResponse
-	if err := json.Unmarshal(raw, &parsed); err != nil {
-		return nil, openAICompatibleResponseMetadata{}, retryableError{err: fmt.Errorf("decode provider response envelope: %w", err)}
-	}
-	if len(parsed.Choices) == 0 {
-		return nil, openAICompatibleResponseMetadata{}, retryableError{err: fmt.Errorf("provider response missing choices")}
-	}
-
-	content, err := extractAssistantContentJSON(parsed.Choices[0].Message.Content)
-	if err != nil {
-		return nil, openAICompatibleResponseMetadata{}, retryableError{err: err}
-	}
-
-	metadata := openAICompatibleResponseMetadata{
-		Model: parsed.Model,
-	}
-	if parsed.Usage != nil {
-		metadata.PromptTokens = parsed.Usage.PromptTokens
-		metadata.CompletionTokens = parsed.Usage.CompletionTokens
-		metadata.TotalTokens = parsed.Usage.TotalTokens
-	}
-	return content, metadata, nil
-}
-
-func extractAssistantContentJSON(raw json.RawMessage) (json.RawMessage, error) {
-	trimmedRaw := bytes.TrimSpace(raw)
-	if len(trimmedRaw) == 0 || bytes.Equal(trimmedRaw, []byte("null")) {
-		return nil, fmt.Errorf("provider response missing assistant message content")
-	}
-
-	var textContent string
-	if err := json.Unmarshal(trimmedRaw, &textContent); err == nil {
-		textContent = strings.TrimSpace(textContent)
-		if textContent == "" {
-			return nil, fmt.Errorf("provider response assistant message content is empty")
-		}
-		if !json.Valid([]byte(textContent)) {
-			return nil, fmt.Errorf("provider response assistant message content is not valid JSON")
-		}
-		return json.RawMessage(textContent), nil
-	}
-
-	if json.Valid(trimmedRaw) {
-		return append(json.RawMessage(nil), trimmedRaw...), nil
-	}
-	return nil, fmt.Errorf("provider response assistant message content is not valid JSON")
-}
-
-func parseProviderErrorBody(status int, body []byte) error {
-	trimmed := strings.TrimSpace(string(body))
-	if trimmed == "" {
-		return fmt.Errorf("provider returned status %d", status)
-	}
-
-	var payload map[string]any
-	if err := json.Unmarshal(body, &payload); err == nil {
-		if nested, ok := payload["error"].(map[string]any); ok {
-			if msg, ok := nested["message"].(string); ok && strings.TrimSpace(msg) != "" {
-				return fmt.Errorf("provider returned status %d: %s", status, strings.TrimSpace(msg))
-			}
-		}
-		if msg, ok := payload["message"].(string); ok && strings.TrimSpace(msg) != "" {
-			return fmt.Errorf("provider returned status %d: %s", status, strings.TrimSpace(msg))
-		}
-	}
-
-	return fmt.Errorf("provider returned status %d: %s", status, trimmed)
-}
-
-func (c *OpenAICompatibleClient) redactError(err error) error {
-	secrets := []string{c.apiKey}
-	if c.apiKey != "" {
-		secrets = append(secrets, "Bearer "+c.apiKey)
-	}
-	return ErrorWithSecretsRedacted(err, secrets)
-}

internal/framework/llm/openai_compatible_client_test.go

@@ -1,494 +0,0 @@
-package llm
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"sync/atomic"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-)
-
-type testArtifact struct {
-	Value string `json:"value"`
-}
-
-func TestNewOpenAICompatibleClientValidation(t *testing.T) {
-	tests := []struct {
-		name string
-		cfg  OpenAICompatibleClientConfig
-		want string
-	}{
-		{
-			name: "empty base URL",
-			cfg: OpenAICompatibleClientConfig{
-				BaseURL: " ",
-				Model:   "model",
-			},
-			want: "base URL",
-		},
-		{
-			name: "invalid base URL",
-			cfg: OpenAICompatibleClientConfig{
-				BaseURL: "://bad",
-				Model:   "model",
-			},
-			want: "base URL",
-		},
-		{
-			name: "empty model",
-			cfg: OpenAICompatibleClientConfig{
-				BaseURL: "https://example.test/v1",
-				Model:   " ",
-			},
-			want: "model",
-		},
-		{
-			name: "negative retries",
-			cfg: OpenAICompatibleClientConfig{
-				BaseURL:    "https://example.test/v1",
-				Model:      "model",
-				MaxRetries: -1,
-			},
-			want: "max retries",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			_, err := NewOpenAICompatibleClient(tc.cfg)
-			if err == nil || !strings.Contains(err.Error(), tc.want) {
-				t.Fatalf("expected error containing %q, got %v", tc.want, err)
-			}
-		})
-	}
-}
-
-func TestOpenAICompatibleClientSuccessfulStructuredCompletion(t *testing.T) {
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		_, _ = io.WriteString(w, `{
-  "model":"provider-model",
-  "choices":[{"message":{"content":"{\"value\":\"ok\"}"}}],
-  "usage":{"prompt_tokens":11,"completion_tokens":7,"total_tokens":18}
-}`)
-	}))
-	defer server.Close()
-
-	client := newTestClient(t, server.URL, "default-model", 0)
-	var out testArtifact
-	resp, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &out)
-	if err != nil {
-		t.Fatalf("CompleteStructured: %v", err)
-	}
-
-	if out.Value != "ok" {
-		t.Fatalf("unexpected decoded output: %+v", out)
-	}
-	if string(resp.Content) != `{"value":"ok"}` {
-		t.Fatalf("unexpected raw content: %s", resp.Content)
-	}
-	if resp.Provider != openAICompatibleProviderName {
-		t.Fatalf("unexpected provider: %q", resp.Provider)
-	}
-	if resp.Model != "provider-model" {
-		t.Fatalf("unexpected model: %q", resp.Model)
-	}
-	if resp.PromptTokens != 11 || resp.CompletionTokens != 7 || resp.TotalTokens != 18 {
-		t.Fatalf("unexpected token metadata: %+v", resp)
-	}
-}
-
-func TestOpenAICompatibleClientRequestBodyIncludesStructuredOutputShape(t *testing.T) {
-	var seenPath string
-	var seenAuthorization string
-	var seenReq map[string]any
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		seenPath = r.URL.Path
-		seenAuthorization = r.Header.Get("Authorization")
-		if err := json.NewDecoder(r.Body).Decode(&seenReq); err != nil {
-			t.Fatalf("decode request: %v", err)
-		}
-		_, _ = io.WriteString(w, `{"choices":[{"message":{"content":"{\"value\":\"ok\"}"}}]}`)
-	}))
-	defer server.Close()
-
-	client, err := NewOpenAICompatibleClient(OpenAICompatibleClientConfig{
-		BaseURL:    server.URL + "/v1",
-		Model:      "default-model",
-		APIKey:     "secret-key",
-		MaxRetries: 0,
-	})
-	if err != nil {
-		t.Fatalf("NewOpenAICompatibleClient: %v", err)
-	}
-
-	var out testArtifact
-	_, err = client.CompleteStructured(context.Background(), validStructuredRequest("request-model"), &out)
-	if err != nil {
-		t.Fatalf("CompleteStructured: %v", err)
-	}
-
-	if seenPath != "/v1/chat/completions" {
-		t.Fatalf("unexpected request path: %q", seenPath)
-	}
-	if seenAuthorization != "Bearer secret-key" {
-		t.Fatalf("unexpected authorization header: %q", seenAuthorization)
-	}
-	if seenReq["model"] != "request-model" {
-		t.Fatalf("unexpected model: %v", seenReq["model"])
-	}
-
-	messages, ok := seenReq["messages"].([]any)
-	if !ok || len(messages) != 1 {
-		t.Fatalf("unexpected messages: %#v", seenReq["messages"])
-	}
-	message, ok := messages[0].(map[string]any)
-	if !ok {
-		t.Fatalf("unexpected message shape: %#v", messages[0])
-	}
-	if message["role"] != "user" || message["content"] != "extract this" {
-		t.Fatalf("unexpected message: %#v", message)
-	}
-
-	responseFormat, ok := seenReq["response_format"].(map[string]any)
-	if !ok {
-		t.Fatalf("expected response_format object, got %T", seenReq["response_format"])
-	}
-	if responseFormat["type"] != "json_schema" {
-		t.Fatalf("unexpected response_format.type: %v", responseFormat["type"])
-	}
-	jsonSchema, ok := responseFormat["json_schema"].(map[string]any)
-	if !ok {
-		t.Fatalf("expected response_format.json_schema object, got %T", responseFormat["json_schema"])
-	}
-	if jsonSchema["name"] != "test_artifact" {
-		t.Fatalf("unexpected schema name: %v", jsonSchema["name"])
-	}
-	if jsonSchema["strict"] != true {
-		t.Fatalf("expected strict=true, got %v", jsonSchema["strict"])
-	}
-	schema, ok := jsonSchema["schema"].(map[string]any)
-	if !ok {
-		t.Fatalf("expected schema object, got %T", jsonSchema["schema"])
-	}
-	if schema["type"] != "object" {
-		t.Fatalf("unexpected schema: %#v", schema)
-	}
-}
-
-func TestOpenAICompatibleClientDefaultModelFallbackAndOverride(t *testing.T) {
-	var seenModels []string
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		var req map[string]any
-		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-			t.Fatalf("decode request: %v", err)
-		}
-		seenModels = append(seenModels, fmt.Sprint(req["model"]))
-		_, _ = io.WriteString(w, `{"choices":[{"message":{"content":"{\"value\":\"ok\"}"}}]}`)
-	}))
-	defer server.Close()
-
-	client := newTestClient(t, server.URL, "default-model", 0)
-	var first testArtifact
-	if _, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &first); err != nil {
-		t.Fatalf("first CompleteStructured: %v", err)
-	}
-	var second testArtifact
-	if _, err := client.CompleteStructured(context.Background(), validStructuredRequest("override-model"), &second); err != nil {
-		t.Fatalf("second CompleteStructured: %v", err)
-	}
-
-	if len(seenModels) != 2 || seenModels[0] != "default-model" || seenModels[1] != "override-model" {
-		t.Fatalf("unexpected models: %v", seenModels)
-	}
-}
-
-func TestOpenAICompatibleClientInvalidOutputTarget(t *testing.T) {
-	client := newTestClient(t, "https://example.test/v1", "default-model", 0)
-
-	tests := []struct {
-		name string
-		out  any
-	}{
-		{name: "nil", out: nil},
-		{name: "non-pointer", out: testArtifact{}},
-		{name: "nil pointer", out: (*testArtifact)(nil)},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			_, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), tc.out)
-			if err == nil || !strings.Contains(err.Error(), "output target") {
-				t.Fatalf("expected output target error, got %v", err)
-			}
-		})
-	}
-}
-
-func TestOpenAICompatibleClientMissingAndInvalidSchema(t *testing.T) {
-	client := newTestClient(t, "https://example.test/v1", "default-model", 0)
-
-	tests := []struct {
-		name   string
-		mutate func(*contracts.StructuredCompletionRequest)
-		want   string
-	}{
-		{
-			name: "missing schema name",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.ResponseSchemaName = " "
-			},
-			want: "schema name",
-		},
-		{
-			name: "missing schema JSON",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.ResponseSchema = nil
-			},
-			want: "schema JSON",
-		},
-		{
-			name: "invalid schema JSON",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.ResponseSchema = json.RawMessage(`{"type":`)
-			},
-			want: "schema JSON",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			req := validStructuredRequest("")
-			tc.mutate(&req)
-			var out testArtifact
-			_, err := client.CompleteStructured(context.Background(), req, &out)
-			if err == nil || !strings.Contains(err.Error(), tc.want) {
-				t.Fatalf("expected error containing %q, got %v", tc.want, err)
-			}
-		})
-	}
-}
-
-func TestOpenAICompatibleClientRejectsEmptyMessages(t *testing.T) {
-	client := newTestClient(t, "https://example.test/v1", "default-model", 0)
-
-	tests := []struct {
-		name   string
-		mutate func(*contracts.StructuredCompletionRequest)
-		want   string
-	}{
-		{
-			name: "no messages",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.Messages = nil
-			},
-			want: "messages",
-		},
-		{
-			name: "empty role",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.Messages[0].Role = " "
-			},
-			want: "role",
-		},
-		{
-			name: "empty content",
-			mutate: func(req *contracts.StructuredCompletionRequest) {
-				req.Messages[0].Content = " "
-			},
-			want: "content",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			req := validStructuredRequest("")
-			tc.mutate(&req)
-			var out testArtifact
-			_, err := client.CompleteStructured(context.Background(), req, &out)
-			if err == nil || !strings.Contains(err.Error(), tc.want) {
-				t.Fatalf("expected error containing %q, got %v", tc.want, err)
-			}
-		})
-	}
-}
-
-func TestOpenAICompatibleClientProviderNon2xxBehavior(t *testing.T) {
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusBadRequest)
-		_, _ = io.WriteString(w, `{"error":{"message":"bad request"}}`)
-	}))
-	defer server.Close()
-
-	client := newTestClient(t, server.URL, "default-model", 0)
-	var out testArtifact
-	_, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &out)
-	if err == nil || !strings.Contains(err.Error(), "status 400: bad request") {
-		t.Fatalf("expected provider status error, got %v", err)
-	}
-}
-
-func TestOpenAICompatibleClientRetries429And5xx(t *testing.T) {
-	var attempts atomic.Int32
-	statuses := []int{http.StatusTooManyRequests, http.StatusInternalServerError, http.StatusOK}
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		attempt := int(attempts.Add(1)) - 1
-		if statuses[attempt] != http.StatusOK {
-			w.WriteHeader(statuses[attempt])
-			_, _ = io.WriteString(w, `{"error":{"message":"try again"}}`)
-			return
-		}
-		_, _ = io.WriteString(w, `{"choices":[{"message":{"content":"{\"value\":\"ok\"}"}}]}`)
-	}))
-	defer server.Close()
-
-	client := newTestClient(t, server.URL, "default-model", 2)
-	var out testArtifact
-	if _, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &out); err != nil {
-		t.Fatalf("CompleteStructured: %v", err)
-	}
-	if attempts.Load() != 3 {
-		t.Fatalf("expected 3 attempts, got %d", attempts.Load())
-	}
-}
-
-func TestOpenAICompatibleClientRetriesMalformedResponses(t *testing.T) {
-	tests := []struct {
-		name      string
-		firstBody string
-	}{
-		{
-			name:      "malformed provider envelope",
-			firstBody: `{"choices":[]}`,
-		},
-		{
-			name:      "malformed assistant JSON",
-			firstBody: `{"choices":[{"message":{"content":"{"}}]}`,
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			var attempts atomic.Int32
-			server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				if attempts.Add(1) == 1 {
-					_, _ = io.WriteString(w, tc.firstBody)
-					return
-				}
-				_, _ = io.WriteString(w, `{"choices":[{"message":{"content":"{\"value\":\"ok\"}"}}]}`)
-			}))
-			defer server.Close()
-
-			client := newTestClient(t, server.URL, "default-model", 1)
-			var out testArtifact
-			if _, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &out); err != nil {
-				t.Fatalf("CompleteStructured: %v", err)
-			}
-			if attempts.Load() != 2 {
-				t.Fatalf("expected 2 attempts, got %d", attempts.Load())
-			}
-		})
-	}
-}
-
-func TestOpenAICompatibleClientNoRetryForNonRetryable4xx(t *testing.T) {
-	var attempts atomic.Int32
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		attempts.Add(1)
-		w.WriteHeader(http.StatusForbidden)
-		_, _ = io.WriteString(w, `{"error":{"message":"forbidden"}}`)
-	}))
-	defer server.Close()
-
-	client := newTestClient(t, server.URL, "default-model", 3)
-	var out testArtifact
-	_, err := client.CompleteStructured(context.Background(), validStructuredRequest(""), &out)
-	if err == nil || !strings.Contains(err.Error(), "status 403") {
-		t.Fatalf("expected forbidden error, got %v", err)
-	}
-	if attempts.Load() != 1 {
-		t.Fatalf("expected 1 attempt, got %d", attempts.Load())
-	}
-}
-
-func TestOpenAICompatibleClientProviderErrorRedactsAPIKey(t *testing.T) {
-	const apiKey = "secret-api-key"
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusInternalServerError)
-		_, _ = io.WriteString(w, `{"error":{"message":"Bearer secret-api-key failed for secret-api-key"}}`)
-	}))
-	defer server.Close()
-
-	client, err := NewOpenAICompatibleClient(OpenAICompatibleClientConfig{
-		BaseURL:    server.URL,
-		Model:      "default-model",
-		APIKey:     apiKey,
-		MaxRetries: 0,
-	})
-	if err != nil {
-		t.Fatalf("NewOpenAICompatibleClient: %v", err)
-	}
-
-	var out testArtifact
-	_, err = client.CompleteStructured(context.Background(), validStructuredRequest(""), &out)
-	if err == nil {
-		t.Fatalf("expected provider error")
-	}
-	if strings.Contains(err.Error(), apiKey) || strings.Contains(err.Error(), "Bearer "+apiKey) {
-		t.Fatalf("expected API key to be redacted, got %q", err.Error())
-	}
-}
-
-func TestOpenAICompatibleClientRespectsContextCancellation(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-
-	client := newTestClient(t, "https://example.test/v1", "default-model", 1)
-	var out testArtifact
-	_, err := client.CompleteStructured(ctx, validStructuredRequest(""), &out)
-	if !errors.Is(err, context.Canceled) {
-		t.Fatalf("expected context canceled, got %v", err)
-	}
-}
-
-func newTestClient(t *testing.T, baseURL string, model string, maxRetries int) *OpenAICompatibleClient {
-	t.Helper()
-	client, err := NewOpenAICompatibleClient(OpenAICompatibleClientConfig{
-		BaseURL:    baseURL,
-		Model:      model,
-		MaxRetries: maxRetries,
-	})
-	if err != nil {
-		t.Fatalf("NewOpenAICompatibleClient: %v", err)
-	}
-	return client
-}
-
-func validStructuredRequest(model string) contracts.StructuredCompletionRequest {
-	return contracts.StructuredCompletionRequest{
-		Messages: []contracts.LLMMessage{
-			{Role: " user ", Content: " extract this "},
-		},
-		Model:              model,
-		ResponseSchemaName: " test_artifact ",
-		ResponseSchema:     testResponseSchema(),
-	}
-}
-
-func testResponseSchema() json.RawMessage {
-	return json.RawMessage(`{
-  "type": "object",
-  "properties": {
-    "value": {"type": "string"}
-  },
-  "required": ["value"],
-  "additionalProperties": false
-}`)
-}

internal/framework/llm/scheduled_client.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 )
 
@@ -41,3 +42,14 @@ func (c *scheduledClient) CompleteStructured(ctx context.Context, req contracts.
 	}
 	return response, nil
 }
+
+func (c *scheduledClient) LLMProfileManifests() []artifacts.LLMProfileManifest {
+	if c == nil || c.client == nil {
+		return nil
+	}
+	provider, ok := c.client.(contracts.LLMProfileManifestProvider)
+	if !ok {
+		return nil
+	}
+	return provider.LLMProfileManifests()
+}

internal/framework/llm/scriptorium_api_test.go

@@ -0,0 +1,175 @@
+package llm
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"testing/fstest"
+	"time"
+
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+func TestScriptoriumPublicAPIGrounding(t *testing.T) {
+	// Keep this compile-time grounding close to the future Notarius adapter so
+	// dependency upgrades reveal API drift before the runtime cutover.
+	engine, err := scriptorium.NewEngine(
+		scriptorium.Config{
+			PromptDir:  "unused-when-prompt-option-is-set",
+			ProfileDir: "",
+			SchemaDir:  "",
+			Timeout:    time.Second,
+		},
+		scriptorium.WithPromptFS(fstest.MapFS{}, "."),
+		scriptorium.WithProfileFS(fstest.MapFS{}, "."),
+		scriptorium.WithSchemaFS(fstest.MapFS{}, "."),
+		scriptorium.WithProfiles(scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
+			ID:             "test-profile",
+			Endpoint:       "http://127.0.0.1:1/v1",
+			Model:          "test-model",
+			APIKeyRequired: true,
+			ExtraParams:    map[string]any{"mode": "test"},
+		})),
+		scriptorium.WithLLMClient(scriptoriumGroundingLLMClient{}),
+	)
+	if err != nil {
+		t.Fatalf("NewEngine() error = %v, want nil", err)
+	}
+	if engine == nil {
+		t.Fatalf("NewEngine() = nil, want engine")
+	}
+
+	var (
+		_ func(string) scriptorium.Option = scriptorium.WithPromptFile
+		_ func(string) scriptorium.Option = scriptorium.WithProfileFile
+		_ func(string) scriptorium.Option = scriptorium.WithSchemaFile
+	)
+
+	req := scriptorium.RunRequest{
+		PromptID:      "dnd.spells",
+		PromptVersion: "v1",
+		ProfileID:     "test-profile",
+		APIKey:        "request-scoped-secret",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.InlineWithURI("file:///tmp/transcript.json", `{"segments":[]}`),
+			"glossary":   scriptorium.Inline(""),
+			"roster":     scriptorium.File("/tmp/roster.txt"),
+		},
+		Vars: map[string]string{
+			"session_id": "session-1",
+		},
+		Execution: &scriptorium.ExecutionTargetOverride{
+			Model:           "override-model",
+			Temperature:     ptr(0.2),
+			MaxTokens:       ptr(100),
+			TopP:            ptr(0.9),
+			TimeoutSeconds:  ptr(30),
+			ServiceTier:     "standard",
+			ReasoningEffort: "low",
+			APIKeyEnv:       "SCRIPTORIUM_API_KEY",
+			ExtraParams:     map[string]any{"provider_option": "value"},
+		},
+		Validation: &scriptorium.OutputContract{
+			Format:         scriptorium.FormatJSON,
+			ValidationMode: scriptorium.ValidationJSONSchema,
+			SchemaPath:     "schemas/dnd_spells.v1.json",
+			RepairAttempts: 1,
+		},
+		Metadata: map[string]string{
+			"artifact_kind": "dnd_spell",
+		},
+	}
+	if req.Inputs["transcript"].Type != scriptorium.ArtifactRefInline {
+		t.Fatalf("inline input type = %q, want %q", req.Inputs["transcript"].Type, scriptorium.ArtifactRefInline)
+	}
+	if req.Inputs["roster"].Type != scriptorium.ArtifactRefFile {
+		t.Fatalf("file input type = %q, want %q", req.Inputs["roster"].Type, scriptorium.ArtifactRefFile)
+	}
+
+	result := scriptorium.RunResult{
+		RunID: "run-1",
+		Artifact: scriptorium.Artifact{
+			Name:        "output",
+			ContentType: "application/json",
+			Body:        []byte(`{"ok":true}`),
+			URI:         "inline://output",
+			Size:        int64(len(`{"ok":true}`)),
+			Hash:        "sha256:abc",
+		},
+		RawOutput:          `{"ok":true}`,
+		PromptID:           req.PromptID,
+		PromptVersion:      req.PromptVersion,
+		PromptHash:         "prompt-hash",
+		RenderedPromptHash: "rendered-prompt-hash",
+		SelectedProfileID:  req.ProfileID,
+		ModelName:          "test-model",
+		Endpoint:           "http://127.0.0.1:1/v1",
+		EffectiveModelParams: scriptorium.ExecutionTarget{
+			Model:           "test-model",
+			APIKeyEnv:       "SCRIPTORIUM_API_KEY",
+			ExtraParams:     map[string]any{"provider_option": "value"},
+			ReasoningEffort: "low",
+		},
+		InputHashes: map[string]string{
+			"transcript": "sha256:def",
+		},
+		Validation: scriptorium.ValidationResult{
+			Status:         scriptorium.ValidationPassed,
+			Mode:           scriptorium.ValidationJSONSchema,
+			SchemaPath:     req.Validation.SchemaPath,
+			RepairAttempts: 1,
+			IsValid:        true,
+		},
+		Usage: scriptorium.TokenUsage{
+			PromptTokens:     10,
+			CompletionTokens: 5,
+			TotalTokens:      15,
+			CachedTokens:     3,
+			CacheWriteTokens: 2,
+		},
+		StartTime: time.Unix(1, 0),
+		EndTime:   time.Unix(2, 0),
+		Duration:  time.Second,
+	}
+	if result.Validation.Status != scriptorium.ValidationPassed {
+		t.Fatalf("validation status = %q, want %q", result.Validation.Status, scriptorium.ValidationPassed)
+	}
+	if result.Usage.TotalTokens != 15 {
+		t.Fatalf("total tokens = %d, want 15", result.Usage.TotalTokens)
+	}
+
+	publicErrors := []error{
+		scriptorium.ErrInvalidConfig,
+		scriptorium.ErrInvalidRequest,
+		scriptorium.ErrPromptNotFound,
+		scriptorium.ErrProfileNotFound,
+		scriptorium.ErrPromptLoad,
+		scriptorium.ErrProfileLoad,
+		scriptorium.ErrArtifactLoad,
+		scriptorium.ErrPromptRender,
+		scriptorium.ErrLLMGenerate,
+		scriptorium.ErrValidation,
+	}
+	for _, publicErr := range publicErrors {
+		if !errors.Is(publicErr, publicErr) {
+			t.Fatalf("sentinel error does not match itself: %v", publicErr)
+		}
+	}
+}
+
+type scriptoriumGroundingLLMClient struct{}
+
+func (scriptoriumGroundingLLMClient) Generate(context.Context, scriptorium.GenerateRequest) (*scriptorium.GenerateResponse, error) {
+	return &scriptorium.GenerateResponse{
+		Content: `{"ok":true}`,
+		Usage: scriptorium.TokenUsage{
+			PromptTokens:     1,
+			CompletionTokens: 1,
+			TotalTokens:      2,
+		},
+	}, nil
+}
+
+func ptr[T any](v T) *T {
+	return &v
+}

internal/framework/llm/scriptorium_client.go

@@ -0,0 +1,379 @@
+package llm
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"regexp"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+const scriptoriumProviderName = "scriptorium"
+
+type ScriptoriumClientConfig struct {
+	ProfileDir    string
+	ProfileFile   string
+	Assets        *AssetRegistry
+	Timeout       time.Duration
+	HTTPClient    *http.Client
+	EngineOptions []scriptorium.Option
+	Recorder      *LLMProfileRecorder
+}
+
+type ScriptoriumClient struct {
+	engine   *scriptorium.Engine
+	recorder *LLMProfileRecorder
+}
+
+type LLMProfileRecorder struct {
+	mu       sync.Mutex
+	profiles map[string]artifacts.LLMProfileManifest
+}
+
+var _ contracts.StructuredLLMClient = (*ScriptoriumClient)(nil)
+var _ contracts.LLMProfileManifestProvider = (*ScriptoriumClient)(nil)
+
+func NewScriptoriumClient(cfg ScriptoriumClientConfig) (*ScriptoriumClient, error) {
+	if cfg.Assets == nil {
+		return nil, fmt.Errorf("scriptorium client assets must not be nil")
+	}
+	if strings.TrimSpace(cfg.ProfileDir) != "" && strings.TrimSpace(cfg.ProfileFile) != "" {
+		return nil, fmt.Errorf("scriptorium profile_dir and profile_file are mutually exclusive")
+	}
+	options, err := cfg.Assets.ScriptoriumOptions()
+	if err != nil {
+		return nil, err
+	}
+	if profileFile := strings.TrimSpace(cfg.ProfileFile); profileFile != "" {
+		options = append(options, scriptorium.WithProfileFile(profileFile))
+	}
+	options = append(options, cfg.EngineOptions...)
+
+	engine, err := scriptorium.NewEngine(scriptorium.Config{
+		ProfileDir: strings.TrimSpace(cfg.ProfileDir),
+		Timeout:    cfg.Timeout,
+		HTTPClient: cfg.HTTPClient,
+	}, options...)
+	if err != nil {
+		return nil, fmt.Errorf("create Scriptorium engine: %w", err)
+	}
+	recorder := cfg.Recorder
+	if recorder == nil {
+		recorder = NewLLMProfileRecorder()
+	}
+	return &ScriptoriumClient{
+		engine:   engine,
+		recorder: recorder,
+	}, nil
+}
+
+func (c *ScriptoriumClient) CompleteStructured(ctx context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
+	if c == nil {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("scriptorium client must not be nil")
+	}
+	if c.engine == nil {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("scriptorium client engine must not be nil")
+	}
+	if err := validateOutputTarget(out); err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	promptID := strings.TrimSpace(req.PromptID)
+	if promptID == "" {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("structured completion prompt_id must not be empty")
+	}
+
+	runReq := scriptorium.RunRequest{
+		PromptID:      promptID,
+		PromptVersion: strings.TrimSpace(req.PromptVersion),
+		ProfileID:     strings.TrimSpace(req.ProfileID),
+		Inputs:        scriptoriumInputs(req.Inputs),
+		Vars:          scriptoriumVars(req),
+		Metadata:      scriptoriumMetadata(req),
+	}
+	prepared, err := c.engine.Prepare(ctx, runReq)
+	if err != nil {
+		if ctxErr := ctx.Err(); ctxErr != nil {
+			return contracts.StructuredCompletionResponse{}, ctxErr
+		}
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("prepare Scriptorium prompt %q: %w", promptID, redactScriptoriumError(err))
+	}
+	result, err := c.engine.Run(ctx, runReq)
+	if err != nil {
+		if ctxErr := ctx.Err(); ctxErr != nil {
+			return contracts.StructuredCompletionResponse{}, ctxErr
+		}
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("run Scriptorium prompt %q: %w", promptID, redactScriptoriumError(err))
+	}
+	if result == nil {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("run Scriptorium prompt %q: empty result", promptID)
+	}
+	response := c.responseFromResult(result, prepared)
+	if result.Validation.Status == scriptorium.ValidationFailed || !result.Validation.IsValid {
+		return response, fmt.Errorf("run Scriptorium prompt %q: validation failed: %s", promptID, strings.Join(result.Validation.Errors, "; "))
+	}
+	if len(strings.TrimSpace(string(response.Content))) == 0 {
+		return response, fmt.Errorf("run Scriptorium prompt %q: empty structured output", promptID)
+	}
+	if err := json.Unmarshal(response.Content, out); err != nil {
+		return response, fmt.Errorf("decode Scriptorium structured output for prompt %q: %w", promptID, err)
+	}
+	return response, nil
+}
+
+func (c *ScriptoriumClient) responseFromResult(result *scriptorium.RunResult, prepared *scriptorium.PreparedRun) contracts.StructuredCompletionResponse {
+	content := result.Artifact.Body
+	if len(content) == 0 {
+		content = []byte(result.RawOutput)
+	}
+	profile := artifacts.LLMProfileManifest{
+		ID:       strings.TrimSpace(result.SelectedProfileID),
+		Provider: scriptoriumProviderName,
+		Model:    firstNonEmpty(result.ModelName, result.EffectiveModelParams.Model),
+	}
+	if c.recorder != nil {
+		c.recorder.Record(profile)
+	}
+	return contracts.StructuredCompletionResponse{
+		Content:          append(json.RawMessage(nil), content...),
+		Provider:         profile.Provider,
+		Model:            profile.Model,
+		ProfileID:        profile.ID,
+		PromptTokens:     result.Usage.PromptTokens,
+		CompletionTokens: result.Usage.CompletionTokens,
+		TotalTokens:      result.Usage.TotalTokens,
+		Debug:            scriptoriumDebugMaterial(prepared, result),
+	}
+}
+
+func scriptoriumDebugMaterial(prepared *scriptorium.PreparedRun, result *scriptorium.RunResult) *contracts.LLMDebugMaterial {
+	material := &contracts.LLMDebugMaterial{}
+	if prepared != nil {
+		material.Prompt = scriptoriumDebugPrompt(prepared)
+	}
+	if result != nil {
+		material.Response = scriptoriumDebugResponse(result)
+	}
+	if material.Prompt == nil && material.Response == nil {
+		return nil
+	}
+	return material
+}
+
+func scriptoriumDebugPrompt(prepared *scriptorium.PreparedRun) *contracts.LLMDebugPrompt {
+	if prepared == nil {
+		return nil
+	}
+	messages := make([]contracts.LLMDebugMessage, 0, len(prepared.Messages))
+	for _, message := range prepared.Messages {
+		messages = append(messages, contracts.LLMDebugMessage{
+			Role:         message.Role,
+			Content:      message.Content,
+			CacheControl: jsonObject(message.CacheControl),
+		})
+	}
+	return &contracts.LLMDebugPrompt{
+		PromptID:             prepared.PromptID,
+		PromptVersion:        prepared.PromptVersion,
+		PromptHash:           prepared.PromptHash,
+		SelectedProfileID:    prepared.SelectedProfileID,
+		SessionID:            prepared.SessionID,
+		RenderedPromptHash:   prepared.RenderedPromptHash,
+		Messages:             messages,
+		EffectiveModelParams: jsonObject(prepared.EffectiveModelParams),
+		OutputContract:       jsonObject(prepared.OutputContract),
+		StructuredOutput:     jsonObject(prepared.StructuredOutput),
+		InputHashes:          cloneStringMap(prepared.InputHashes),
+	}
+}
+
+func scriptoriumDebugResponse(result *scriptorium.RunResult) *contracts.LLMDebugResponse {
+	if result == nil {
+		return nil
+	}
+	content := result.RawOutput
+	if content == "" {
+		content = string(result.Artifact.Body)
+	}
+	return &contracts.LLMDebugResponse{
+		Content:              content,
+		RunID:                result.RunID,
+		PromptID:             result.PromptID,
+		PromptVersion:        result.PromptVersion,
+		PromptHash:           result.PromptHash,
+		RenderedPromptHash:   result.RenderedPromptHash,
+		SelectedProfileID:    result.SelectedProfileID,
+		ModelName:            result.ModelName,
+		Endpoint:             result.Endpoint,
+		EffectiveModelParams: jsonObject(result.EffectiveModelParams),
+		InputHashes:          cloneStringMap(result.InputHashes),
+		Validation:           jsonObject(result.Validation),
+		Usage: contracts.LLMDebugUsage{
+			PromptTokens:     result.Usage.PromptTokens,
+			CompletionTokens: result.Usage.CompletionTokens,
+			TotalTokens:      result.Usage.TotalTokens,
+			CachedTokens:     result.Usage.CachedTokens,
+			CacheWriteTokens: result.Usage.CacheWriteTokens,
+		},
+	}
+}
+
+func jsonObject(value any) map[string]any {
+	if value == nil {
+		return nil
+	}
+	data, err := json.Marshal(value)
+	if err != nil || string(data) == "null" {
+		return nil
+	}
+	var out map[string]any
+	if err := json.Unmarshal(data, &out); err != nil {
+		return nil
+	}
+	if len(out) == 0 {
+		return nil
+	}
+	return out
+}
+
+func cloneStringMap(values map[string]string) map[string]string {
+	if len(values) == 0 {
+		return nil
+	}
+	out := make(map[string]string, len(values))
+	for key, value := range values {
+		out[key] = value
+	}
+	return out
+}
+
+func (c *ScriptoriumClient) LLMProfileManifests() []artifacts.LLMProfileManifest {
+	if c == nil || c.recorder == nil {
+		return nil
+	}
+	return c.recorder.Manifests()
+}
+
+func NewLLMProfileRecorder() *LLMProfileRecorder {
+	return &LLMProfileRecorder{profiles: map[string]artifacts.LLMProfileManifest{}}
+}
+
+func (r *LLMProfileRecorder) Record(profile artifacts.LLMProfileManifest) {
+	if r == nil {
+		return
+	}
+	profile.ID = strings.TrimSpace(profile.ID)
+	profile.Provider = strings.TrimSpace(profile.Provider)
+	profile.Model = strings.TrimSpace(profile.Model)
+	key := profile.ID + "\x00" + profile.Provider + "\x00" + profile.Model
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	if r.profiles == nil {
+		r.profiles = map[string]artifacts.LLMProfileManifest{}
+	}
+	r.profiles[key] = profile
+}
+
+func (r *LLMProfileRecorder) Manifests() []artifacts.LLMProfileManifest {
+	if r == nil {
+		return nil
+	}
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	if len(r.profiles) == 0 {
+		return nil
+	}
+	keys := make([]string, 0, len(r.profiles))
+	for key := range r.profiles {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	out := make([]artifacts.LLMProfileManifest, 0, len(keys))
+	for _, key := range keys {
+		out = append(out, r.profiles[key])
+	}
+	return out
+}
+
+func scriptoriumInputs(inputs contracts.LLMInputSet) map[string]scriptorium.ArtifactRef {
+	if len(inputs) == 0 {
+		return nil
+	}
+	out := make(map[string]scriptorium.ArtifactRef, len(inputs))
+	for key, material := range inputs {
+		name := strings.TrimSpace(key)
+		if name == "" {
+			name = strings.TrimSpace(material.Name)
+		}
+		if name == "" {
+			continue
+		}
+		body := string(material.Content)
+		if body == "" {
+			body = " "
+		}
+		if origin := strings.TrimSpace(material.OriginURI); origin != "" {
+			out[name] = scriptorium.InlineWithURI(origin, body)
+		} else {
+			out[name] = scriptorium.Inline(body)
+		}
+	}
+	return out
+}
+
+func scriptoriumVars(req contracts.StructuredCompletionRequest) map[string]string {
+	vars := make(map[string]string, len(req.Vars)+1)
+	for key, value := range req.Vars {
+		name := strings.TrimSpace(key)
+		if name == "" || value == nil {
+			continue
+		}
+		vars[name] = fmt.Sprint(value)
+	}
+	if sessionID := strings.TrimSpace(req.SessionID); sessionID != "" {
+		vars["session_id"] = sessionID
+	}
+	if len(vars) == 0 {
+		return nil
+	}
+	return vars
+}
+
+func scriptoriumMetadata(req contracts.StructuredCompletionRequest) map[string]string {
+	metadata := map[string]string{}
+	if stageName := strings.TrimSpace(req.StageName); stageName != "" {
+		metadata["stage_name"] = stageName
+	}
+	if len(metadata) == 0 {
+		return nil
+	}
+	return metadata
+}
+
+var bearerTokenPattern = regexp.MustCompile(`(?i)Bearer\s+[A-Za-z0-9._~+/=-]+`)
+
+func redactScriptoriumError(err error) error {
+	if err == nil {
+		return nil
+	}
+	return redactedProviderError{err: err}
+}
+
+type redactedProviderError struct {
+	err error
+}
+
+func (e redactedProviderError) Error() string {
+	return bearerTokenPattern.ReplaceAllString(e.err.Error(), "Bearer "+secretReplacement)
+}
+
+func (e redactedProviderError) Unwrap() error {
+	return e.err
+}

internal/framework/llm/scriptorium_client_test.go

@@ -0,0 +1,352 @@
+package llm
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"testing/fstest"
+	"time"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/scriptorium"
+)
+
+func TestScriptoriumClientMapsPromptRequestAndUnmarshalsOutput(t *testing.T) {
+	fake := &fakeScriptoriumLLM{content: `{"ok":true}`}
+	client := newTestScriptoriumClient(t, fake)
+
+	var out struct {
+		OK bool `json:"ok"`
+	}
+	resp, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+		StageName:     "test-stage",
+		PromptID:      "adapter.test",
+		PromptVersion: "v1",
+		ProfileID:     "explicit-profile",
+		SessionID:     "session-123",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "sha256:source", "file:///source.json"),
+		},
+		Vars: map[string]any{"custom": "value"},
+	}, &out)
+	if err != nil {
+		t.Fatalf("CompleteStructured() error = %v, want nil", err)
+	}
+	if !out.OK {
+		t.Fatalf("decoded output OK = false, want true")
+	}
+	if resp.Provider != scriptoriumProviderName || resp.Model != "explicit-model" || resp.ProfileID != "explicit-profile" {
+		t.Fatalf("response metadata = %#v", resp)
+	}
+	if resp.PromptTokens != 11 || resp.CompletionTokens != 7 || resp.TotalTokens != 18 {
+		t.Fatalf("usage = %#v, want mapped token counts", resp)
+	}
+	if resp.Debug == nil || resp.Debug.Prompt == nil {
+		t.Fatalf("debug prompt = nil, want prepared prompt material")
+	}
+	if resp.Debug.Prompt.PromptID != "adapter.test" || resp.Debug.Prompt.SelectedProfileID != "explicit-profile" {
+		t.Fatalf("debug prompt metadata = %#v, want prompt/profile", resp.Debug.Prompt)
+	}
+	if len(resp.Debug.Prompt.Messages) != 1 || !strings.Contains(resp.Debug.Prompt.Messages[0].Content, `{"source":true}`) {
+		t.Fatalf("debug prompt messages = %#v, want rendered input content", resp.Debug.Prompt.Messages)
+	}
+	if resp.Debug.Response == nil || resp.Debug.Response.Content != `{"ok":true}` {
+		t.Fatalf("debug response = %#v, want raw response content", resp.Debug.Response)
+	}
+	debugJSON, err := json.Marshal(resp.Debug)
+	if err != nil {
+		t.Fatalf("marshal debug material: %v", err)
+	}
+	if strings.Contains(string(debugJSON), "secret-token") || strings.Contains(string(debugJSON), "sk-") {
+		t.Fatalf("debug material contains secret material: %s", debugJSON)
+	}
+	gotReq := fake.lastRequest()
+	if gotReq.Prompt.SessionID != "session-123" {
+		t.Fatalf("session id = %q, want session-123", gotReq.Prompt.SessionID)
+	}
+	if gotReq.Target.Model != "explicit-model" {
+		t.Fatalf("model = %q, want explicit-model", gotReq.Target.Model)
+	}
+	if len(gotReq.Prompt.Messages) != 1 || !strings.Contains(gotReq.Prompt.Messages[0].Content, `{"source":true}`) {
+		t.Fatalf("rendered messages = %#v, want transcript input content", gotReq.Prompt.Messages)
+	}
+	if gotReq.StructuredOutput == nil {
+		t.Fatalf("structured output = nil, want JSON schema")
+	}
+	manifests := client.LLMProfileManifests()
+	if len(manifests) != 1 || manifests[0].ID != "explicit-profile" || manifests[0].Model != "explicit-model" {
+		t.Fatalf("profile manifests = %#v", manifests)
+	}
+}
+
+func TestScriptoriumClientUsesPromptDefaultProfileWhenRequestProfileEmpty(t *testing.T) {
+	fake := &fakeScriptoriumLLM{content: `{"ok":true}`}
+	client := newTestScriptoriumClient(t, fake)
+
+	var out map[string]any
+	if _, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+		PromptID:  "adapter.test",
+		SessionID: "session-123",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+		},
+	}, &out); err != nil {
+		t.Fatalf("CompleteStructured() error = %v, want nil", err)
+	}
+	if got := fake.lastRequest().Target.Model; got != "default-model" {
+		t.Fatalf("model = %q, want prompt default profile model", got)
+	}
+}
+
+func TestScriptoriumClientValidationFailureReturnsError(t *testing.T) {
+	client := newTestScriptoriumClient(t, &fakeScriptoriumLLM{content: `{"bad":true}`})
+
+	var out map[string]any
+	resp, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+		PromptID:  "adapter.test",
+		SessionID: "session-123",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+		},
+	}, &out)
+	if err == nil || !strings.Contains(err.Error(), "validation failed") {
+		t.Fatalf("CompleteStructured() error = %v, want validation failure", err)
+	}
+	if got := string(resp.Content); got != `{"bad":true}` {
+		t.Fatalf("response content = %q, want raw failed output", got)
+	}
+	if resp.Debug == nil || resp.Debug.Response == nil || resp.Debug.Response.Content != `{"bad":true}` {
+		t.Fatalf("debug response = %#v, want raw failed output", resp.Debug)
+	}
+	if resp.Debug.Prompt == nil || len(resp.Debug.Prompt.Messages) == 0 {
+		t.Fatalf("debug prompt = %#v, want prepared prompt material", resp.Debug.Prompt)
+	}
+}
+
+func TestScriptoriumClientDecodeFailureReturnsRawResponse(t *testing.T) {
+	client := newTestScriptoriumClient(t, &fakeScriptoriumLLM{content: `{"ok":true}`})
+
+	var out []any
+	resp, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+		PromptID:  "adapter.test",
+		SessionID: "session-123",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+		},
+	}, &out)
+	if err == nil || !strings.Contains(err.Error(), "decode Scriptorium structured output") {
+		t.Fatalf("CompleteStructured() error = %v, want decode failure", err)
+	}
+	if got := string(resp.Content); got != `{"ok":true}` {
+		t.Fatalf("response content = %q, want raw decode-failed output", got)
+	}
+	if resp.Debug == nil || resp.Debug.Response == nil || resp.Debug.Response.Content != `{"ok":true}` {
+		t.Fatalf("debug response = %#v, want raw decode-failed output", resp.Debug)
+	}
+}
+
+func TestScriptoriumClientProviderFailureIncludesContextAndRedactsBearerToken(t *testing.T) {
+	client := newTestScriptoriumClient(t, &fakeScriptoriumLLM{err: errors.New("provider failed with Bearer secret-token")})
+
+	var out map[string]any
+	resp, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+		PromptID:  "adapter.test",
+		SessionID: "session-123",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+		},
+	}, &out)
+	if err == nil {
+		t.Fatalf("CompleteStructured() error = nil, want provider error")
+	}
+	if !strings.Contains(err.Error(), `run Scriptorium prompt "adapter.test"`) {
+		t.Fatalf("error = %q, want operation context", err.Error())
+	}
+	if strings.Contains(err.Error(), "secret-token") || !strings.Contains(err.Error(), "Bearer [REDACTED]") {
+		t.Fatalf("error = %q, want redacted bearer token", err.Error())
+	}
+	if resp.Debug != nil {
+		t.Fatalf("debug material = %#v, want none for provider failure without result", resp.Debug)
+	}
+}
+
+func TestScriptoriumClientContextCancellationIsRespected(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	client := newTestScriptoriumClient(t, &fakeScriptoriumLLM{content: `{"ok":true}`})
+
+	var out map[string]any
+	_, err := client.CompleteStructured(ctx, contracts.StructuredCompletionRequest{
+		PromptID: "adapter.test",
+		Inputs: contracts.LLMInputSet{
+			"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+		},
+	}, &out)
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("CompleteStructured() error = %v, want context canceled", err)
+	}
+}
+
+func TestScheduledScriptoriumClientBoundsConcurrentCalls(t *testing.T) {
+	fake := &fakeScriptoriumLLM{
+		content: `{"ok":true}`,
+		block:   make(chan struct{}),
+	}
+	client := newTestScriptoriumClient(t, fake)
+	scheduler, err := NewScheduler(1)
+	if err != nil {
+		t.Fatalf("NewScheduler() error = %v, want nil", err)
+	}
+	scheduled := NewScheduledClient(client, scheduler)
+
+	var wg sync.WaitGroup
+	for i := 0; i < 3; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			var out map[string]any
+			_, callErr := scheduled.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{
+				PromptID:  "adapter.test",
+				SessionID: "session-123",
+				Inputs: contracts.LLMInputSet{
+					"transcript": contracts.NewLLMInputMaterial("transcript", "application/json", []byte(`{"source":true}`), "", ""),
+				},
+			}, &out)
+			if callErr != nil {
+				t.Errorf("CompleteStructured() error = %v, want nil", callErr)
+			}
+		}()
+	}
+	waitForAtomicAtLeast(t, &fake.calls, 1)
+	time.Sleep(20 * time.Millisecond)
+	if got := atomic.LoadInt32(&fake.maxInFlight); got > 1 {
+		t.Fatalf("max in-flight calls = %d, want <= 1", got)
+	}
+	close(fake.block)
+	wg.Wait()
+}
+
+func TestScriptoriumClientValidatesRequest(t *testing.T) {
+	client := newTestScriptoriumClient(t, &fakeScriptoriumLLM{content: `{"ok":true}`})
+	var out map[string]any
+	if _, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{}, &out); err == nil || !strings.Contains(err.Error(), "prompt_id") {
+		t.Fatalf("missing prompt id error = %v, want prompt_id validation", err)
+	}
+	if _, err := client.CompleteStructured(context.Background(), contracts.StructuredCompletionRequest{PromptID: "adapter.test"}, nil); err == nil || !strings.Contains(err.Error(), "non-nil pointer") {
+		t.Fatalf("nil output error = %v, want output validation", err)
+	}
+}
+
+func newTestScriptoriumClient(t *testing.T, fake *fakeScriptoriumLLM) *ScriptoriumClient {
+	t.Helper()
+	registry := NewAssetRegistry()
+	if err := registry.RegisterPromptFS(fstest.MapFS{
+		"adapter.test.yaml": {Data: []byte(`id: adapter.test
+version: "v1"
+default_profile: default-profile
+session_id: "{{ .session_id }}"
+inputs:
+  - name: transcript
+    required: true
+    content_type: application/json
+messages:
+  - role: user
+    content: "Transcript: {{ input \"transcript\" }}"
+output:
+  format: json
+  validation_mode: json_schema
+  schema_path: adapter.schema.json
+  repair_attempts: 0
+`)},
+	}, "."); err != nil {
+		t.Fatalf("RegisterPromptFS() error = %v", err)
+	}
+	if err := registry.RegisterSchemaFS(fstest.MapFS{
+		"adapter.schema.json": {Data: []byte(`{"type":"object","required":["ok"],"properties":{"ok":{"type":"boolean"}}}`)},
+	}, "."); err != nil {
+		t.Fatalf("RegisterSchemaFS() error = %v", err)
+	}
+	client, err := NewScriptoriumClient(ScriptoriumClientConfig{
+		Assets: registry,
+		EngineOptions: []scriptorium.Option{
+			scriptorium.WithProfiles(
+				scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
+					ID:       "default-profile",
+					Endpoint: "http://127.0.0.1:1/v1",
+					Model:    "default-model",
+				}),
+				scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
+					ID:       "explicit-profile",
+					Endpoint: "http://127.0.0.1:1/v1",
+					Model:    "explicit-model",
+				}),
+			),
+			scriptorium.WithLLMClient(fake),
+		},
+	})
+	if err != nil {
+		t.Fatalf("NewScriptoriumClient() error = %v, want nil", err)
+	}
+	return client
+}
+
+type fakeScriptoriumLLM struct {
+	content     string
+	err         error
+	block       chan struct{}
+	mu          sync.Mutex
+	last        scriptorium.GenerateRequest
+	calls       int32
+	inFlight    int32
+	maxInFlight int32
+}
+
+func (f *fakeScriptoriumLLM) Generate(ctx context.Context, req scriptorium.GenerateRequest) (*scriptorium.GenerateResponse, error) {
+	f.mu.Lock()
+	f.last = req
+	f.mu.Unlock()
+	atomic.AddInt32(&f.calls, 1)
+	current := atomic.AddInt32(&f.inFlight, 1)
+	for {
+		seen := atomic.LoadInt32(&f.maxInFlight)
+		if current <= seen || atomic.CompareAndSwapInt32(&f.maxInFlight, seen, current) {
+			break
+		}
+	}
+	defer atomic.AddInt32(&f.inFlight, -1)
+	if f.block != nil {
+		select {
+		case <-f.block:
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
+	}
+	if f.err != nil {
+		return nil, f.err
+	}
+	content := f.content
+	if content == "" {
+		content = `{"ok":true}`
+	}
+	if !json.Valid([]byte(content)) {
+		return nil, errors.New("test fake must return JSON content")
+	}
+	return &scriptorium.GenerateResponse{
+		Content: content,
+		Usage: scriptorium.TokenUsage{
+			PromptTokens:     11,
+			CompletionTokens: 7,
+			TotalTokens:      18,
+		},
+	}, nil
+}
+
+func (f *fakeScriptoriumLLM) lastRequest() scriptorium.GenerateRequest {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	return f.last
+}

internal/framework/pipeline/artifact_codec_registry.go

@@ -0,0 +1,318 @@
+package pipeline
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"sort"
+	"strings"
+
+	"github.com/santhosh-tekuri/jsonschema/v6"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+)
+
+type ArtifactCodecSpec struct {
+	Kind         contracts.ArtifactKind
+	Schema       contracts.ArtifactSchema
+	SchemaDigest string
+	MediaType    string
+}
+
+// ArtifactCodecTypeError reports a value that does not have the exact Go type
+// registered for an artifact kind.
+type ArtifactCodecTypeError struct {
+	Operation    string
+	Kind         contracts.ArtifactKind
+	ExpectedType string
+	ActualType   string
+}
+
+func (e *ArtifactCodecTypeError) Error() string {
+	return fmt.Sprintf("%s artifact %q: expected exact Go type %s, got %s", e.Operation, e.Kind, e.ExpectedType, e.ActualType)
+}
+
+// ArtifactCodecCompatibilityError reports serialized metadata that does not
+// identify the registered representation for an artifact kind.
+type ArtifactCodecCompatibilityError struct {
+	Kind   contracts.ArtifactKind
+	Reason string
+}
+
+func (e *ArtifactCodecCompatibilityError) Error() string {
+	return fmt.Sprintf("decode artifact %q: %s", e.Kind, e.Reason)
+}
+
+// ArtifactCodecOperationError preserves an encode or decode failure from the
+// registered domain codec.
+type ArtifactCodecOperationError struct {
+	Operation string
+	Kind      contracts.ArtifactKind
+	Err       error
+}
+
+func (e *ArtifactCodecOperationError) Error() string {
+	return fmt.Sprintf("%s artifact %q: %v", e.Operation, e.Kind, e.Err)
+}
+
+func (e *ArtifactCodecOperationError) Unwrap() error { return e.Err }
+
+type ArtifactCodecRegistry struct {
+	entries map[contracts.ArtifactKind]artifactCodecEntry
+}
+
+type artifactCodecEntry struct {
+	spec            ArtifactCodecSpec
+	valueType       reflect.Type
+	encode          func(any) ([]byte, error)
+	encodeCandidate func(any) ([]byte, error)
+	metadata        func(any) map[string]any
+	decode          func([]byte) (any, error)
+}
+
+func NewArtifactCodecRegistry() *ArtifactCodecRegistry {
+	return &ArtifactCodecRegistry{entries: make(map[contracts.ArtifactKind]artifactCodecEntry)}
+}
+
+// RegisterArtifactCodec registers one codec for T. The concrete type is kept
+// private and checked at every erased encode boundary.
+func RegisterArtifactCodec[T any](registry *ArtifactCodecRegistry, codec contracts.ArtifactCodec[T]) error {
+	if registry == nil {
+		return fmt.Errorf("artifact codec registry must not be nil")
+	}
+	if nilInterface(codec) {
+		return fmt.Errorf("artifact codec must not be nil")
+	}
+
+	spec, err := artifactCodecSpec(codec.Kind(), codec.Schema(), codec.MediaType())
+	if err != nil {
+		return err
+	}
+	if _, ok := registry.entries[spec.Kind]; ok {
+		return fmt.Errorf("artifact codec %q is already registered", spec.Kind)
+	}
+
+	valueType := reflect.TypeFor[T]()
+	entry := artifactCodecEntry{
+		spec:      cloneArtifactCodecSpec(spec),
+		valueType: valueType,
+		encode: func(value any) ([]byte, error) {
+			actualType := reflect.TypeOf(value)
+			if actualType != valueType {
+				return nil, newArtifactCodecTypeError("encode", spec.Kind, valueType, actualType)
+			}
+			typed, ok := value.(T)
+			if !ok {
+				return nil, newArtifactCodecTypeError("encode", spec.Kind, valueType, actualType)
+			}
+			encoded, err := codec.Encode(typed)
+			if err != nil {
+				return nil, &ArtifactCodecOperationError{Operation: "encode", Kind: spec.Kind, Err: err}
+			}
+			return append([]byte(nil), encoded...), nil
+		},
+		decode: func(content []byte) (any, error) {
+			decoded, err := codec.Decode(append([]byte(nil), content...))
+			if err != nil {
+				return nil, &ArtifactCodecOperationError{Operation: "decode", Kind: spec.Kind, Err: err}
+			}
+			return decoded, nil
+		},
+	}
+	entry.encodeCandidate = entry.encode
+	if candidate, ok := any(codec).(interface{ EncodeCandidate(T) ([]byte, error) }); ok {
+		entry.encodeCandidate = func(value any) ([]byte, error) {
+			typed, err := exactTypedValue[T]("encode candidate artifact", value)
+			if err != nil {
+				return nil, err
+			}
+			content, err := candidate.EncodeCandidate(typed)
+			if err != nil {
+				return nil, &ArtifactCodecOperationError{Operation: "encode", Kind: spec.Kind, Err: err}
+			}
+			return append([]byte(nil), content...), nil
+		}
+	}
+	if provider, ok := any(codec).(interface{ Metadata(T) map[string]any }); ok {
+		entry.metadata = func(value any) map[string]any {
+			typed, err := exactTypedValue[T]("artifact metadata", value)
+			if err != nil {
+				return nil
+			}
+			return cloneMetadata(provider.Metadata(typed))
+		}
+	}
+	if registry.entries == nil {
+		registry.entries = make(map[contracts.ArtifactKind]artifactCodecEntry)
+	}
+	registry.entries[spec.Kind] = entry
+	return nil
+}
+
+func (r *ArtifactCodecRegistry) Spec(kind contracts.ArtifactKind) (ArtifactCodecSpec, bool) {
+	if r == nil {
+		return ArtifactCodecSpec{}, false
+	}
+	entry, ok := r.entries[normalizeArtifactKind(kind)]
+	if !ok {
+		return ArtifactCodecSpec{}, false
+	}
+	return cloneArtifactCodecSpec(entry.spec), true
+}
+
+func (r *ArtifactCodecRegistry) valueType(kind contracts.ArtifactKind) (reflect.Type, bool) {
+	if r == nil {
+		return nil, false
+	}
+	entry, ok := r.entries[normalizeArtifactKind(kind)]
+	if !ok {
+		return nil, false
+	}
+	return entry.valueType, true
+}
+
+func (r *ArtifactCodecRegistry) RegisteredKinds() []contracts.ArtifactKind {
+	if r == nil || len(r.entries) == 0 {
+		return nil
+	}
+	kinds := make([]contracts.ArtifactKind, 0, len(r.entries))
+	for kind := range r.entries {
+		kinds = append(kinds, kind)
+	}
+	sort.Slice(kinds, func(i, j int) bool { return kinds[i] < kinds[j] })
+	return kinds
+}
+
+// Encode serializes an erased framework value after proving its exact
+// registered Go type.
+func (r *ArtifactCodecRegistry) Encode(kind contracts.ArtifactKind, value any) (contracts.SerializedArtifact, error) {
+	entry, normalizedKind, err := r.entry(kind)
+	if err != nil {
+		return contracts.SerializedArtifact{}, err
+	}
+	content, err := entry.encode(value)
+	if err != nil {
+		return contracts.SerializedArtifact{}, err
+	}
+	return contracts.SerializedArtifact{
+		Kind:      normalizedKind,
+		Schema:    contracts.CloneArtifactSchema(entry.spec.Schema),
+		MediaType: entry.spec.MediaType,
+		Content:   content,
+	}, nil
+}
+
+// Decode verifies serialized identity before invoking the registered codec.
+func (r *ArtifactCodecRegistry) Decode(artifact contracts.SerializedArtifact) (any, error) {
+	entry, normalizedKind, err := r.entry(artifact.Kind)
+	if err != nil {
+		return nil, err
+	}
+	if artifact.Schema.ID != entry.spec.Schema.ID || artifact.Schema.Name != entry.spec.Schema.Name || artifact.Schema.Version != entry.spec.Schema.Version {
+		return nil, &ArtifactCodecCompatibilityError{Kind: normalizedKind, Reason: "schema identity does not match registered codec"}
+	}
+	if contracts.DigestArtifactSchema(artifact.Schema) != entry.spec.SchemaDigest {
+		return nil, &ArtifactCodecCompatibilityError{Kind: normalizedKind, Reason: "schema digest does not match registered codec"}
+	}
+	if strings.TrimSpace(artifact.MediaType) != entry.spec.MediaType {
+		return nil, &ArtifactCodecCompatibilityError{Kind: normalizedKind, Reason: "media type does not match registered codec"}
+	}
+	return entry.decode(artifact.Content)
+}
+
+func (r *ArtifactCodecRegistry) entry(kind contracts.ArtifactKind) (artifactCodecEntry, contracts.ArtifactKind, error) {
+	if r == nil {
+		return artifactCodecEntry{}, "", fmt.Errorf("artifact codec registry must not be nil")
+	}
+	normalizedKind := normalizeArtifactKind(kind)
+	if normalizedKind == "" {
+		return artifactCodecEntry{}, "", fmt.Errorf("artifact kind must not be empty")
+	}
+	entry, ok := r.entries[normalizedKind]
+	if !ok {
+		return artifactCodecEntry{}, normalizedKind, fmt.Errorf("artifact codec %q is not registered", normalizedKind)
+	}
+	return entry, normalizedKind, nil
+}
+
+func artifactCodecSpec(kind contracts.ArtifactKind, schema contracts.ArtifactSchema, mediaType string) (ArtifactCodecSpec, error) {
+	kind = normalizeArtifactKind(kind)
+	schema.ID = strings.TrimSpace(schema.ID)
+	schema.Name = strings.TrimSpace(schema.Name)
+	schema.Version = strings.TrimSpace(schema.Version)
+	mediaType = strings.TrimSpace(mediaType)
+	switch {
+	case kind == "":
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec kind must not be empty")
+	case schema.ID == "":
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q schema id must not be empty", kind)
+	case schema.Name == "":
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q schema name must not be empty", kind)
+	case schema.Version == "":
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q schema version must not be empty", kind)
+	case mediaType == "":
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q media type must not be empty", kind)
+	case len(bytes.TrimSpace(schema.JSONSchema)) == 0:
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q JSON Schema must not be empty", kind)
+	case !json.Valid(schema.JSONSchema):
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q JSON Schema must be valid JSON", kind)
+	}
+	schemaDocument, err := jsonschema.UnmarshalJSON(bytes.NewReader(schema.JSONSchema))
+	if err != nil {
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q JSON Schema is invalid: %w", kind, err)
+	}
+	compiler := jsonschema.NewCompiler()
+	if err := compiler.AddResource("artifact-schema.json", schemaDocument); err != nil {
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q JSON Schema is invalid: %w", kind, err)
+	}
+	if _, err := compiler.Compile("artifact-schema.json"); err != nil {
+		return ArtifactCodecSpec{}, fmt.Errorf("artifact codec %q JSON Schema is invalid: %w", kind, err)
+	}
+	schema = contracts.CloneArtifactSchema(schema)
+	return ArtifactCodecSpec{
+		Kind:         kind,
+		Schema:       schema,
+		SchemaDigest: contracts.DigestArtifactSchema(schema),
+		MediaType:    mediaType,
+	}, nil
+}
+
+func normalizeArtifactKind(kind contracts.ArtifactKind) contracts.ArtifactKind {
+	return contracts.ArtifactKind(strings.TrimSpace(string(kind)))
+}
+
+func cloneArtifactCodecSpec(spec ArtifactCodecSpec) ArtifactCodecSpec {
+	spec.Schema = contracts.CloneArtifactSchema(spec.Schema)
+	return spec
+}
+
+func nilInterface(value any) bool {
+	if value == nil {
+		return true
+	}
+	reflected := reflect.ValueOf(value)
+	switch reflected.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer, reflect.Slice:
+		return reflected.IsNil()
+	default:
+		return false
+	}
+}
+
+func newArtifactCodecTypeError(operation string, kind contracts.ArtifactKind, expected reflect.Type, actual reflect.Type) error {
+	expectedName := "<nil>"
+	if expected != nil {
+		expectedName = expected.String()
+	}
+	actualName := "<nil>"
+	if actual != nil {
+		actualName = actual.String()
+	}
+	return &ArtifactCodecTypeError{
+		Operation:    operation,
+		Kind:         kind,
+		ExpectedType: expectedName,
+		ActualType:   actualName,
+	}
+}

internal/framework/pipeline/artifact_codec_registry_test.go

@@ -0,0 +1,307 @@
+package pipeline
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"reflect"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+)
+
+type codecNotes struct {
+	Items []string `json:"items"`
+}
+
+type codecScore struct {
+	Value int `json:"value"`
+}
+
+type codecNotesAlias codecNotes
+
+type testArtifactCodec[T any] struct {
+	kind       contracts.ArtifactKind
+	schema     contracts.ArtifactSchema
+	mediaType  string
+	encodeFunc func(T) ([]byte, error)
+	decodeFunc func([]byte) (T, error)
+}
+
+func (c testArtifactCodec[T]) Kind() contracts.ArtifactKind     { return c.kind }
+func (c testArtifactCodec[T]) Schema() contracts.ArtifactSchema { return c.schema }
+func (c testArtifactCodec[T]) MediaType() string                { return c.mediaType }
+func (c testArtifactCodec[T]) Encode(value T) ([]byte, error)   { return c.encodeFunc(value) }
+func (c testArtifactCodec[T]) Decode(content []byte) (T, error) { return c.decodeFunc(content) }
+
+func TestArtifactCodecRegistryStoresHeterogeneousExactTypes(t *testing.T) {
+	registry := NewArtifactCodecRegistry()
+	if err := RegisterArtifactCodec(registry, notesCodec()); err != nil {
+		t.Fatalf("RegisterArtifactCodec(notes) error = %v, want nil", err)
+	}
+	if err := RegisterArtifactCodec(registry, scoreCodec()); err != nil {
+		t.Fatalf("RegisterArtifactCodec(score) error = %v, want nil", err)
+	}
+
+	if got, want := registry.RegisteredKinds(), []contracts.ArtifactKind{"test/notes", "test/score"}; !reflect.DeepEqual(got, want) {
+		t.Fatalf("RegisteredKinds() = %#v, want %#v", got, want)
+	}
+	notes := codecNotes{Items: []string{"second", "first"}}
+	first, err := registry.Encode("test/notes", notes)
+	if err != nil {
+		t.Fatalf("Encode(notes) error = %v, want nil", err)
+	}
+	second, err := registry.Encode(" test/notes ", notes)
+	if err != nil {
+		t.Fatalf("Encode(notes again) error = %v, want nil", err)
+	}
+	if !bytes.Equal(first.Content, second.Content) {
+		t.Fatalf("equal values encoded as %q and %q, want deterministic bytes", first.Content, second.Content)
+	}
+	decodedNotes, err := registry.Decode(first)
+	if err != nil {
+		t.Fatalf("Decode(notes) error = %v, want nil", err)
+	}
+	if !reflect.DeepEqual(decodedNotes, notes) {
+		t.Fatalf("Decode(notes) = %#v, want %#v", decodedNotes, notes)
+	}
+
+	score := codecScore{Value: 17}
+	serializedScore, err := registry.Encode("test/score", score)
+	if err != nil {
+		t.Fatalf("Encode(score) error = %v, want nil", err)
+	}
+	decodedScore, err := registry.Decode(serializedScore)
+	if err != nil {
+		t.Fatalf("Decode(score) error = %v, want nil", err)
+	}
+	if decodedScore != score {
+		t.Fatalf("Decode(score) = %#v, want %#v", decodedScore, score)
+	}
+
+	_, err = registry.Encode("test/notes", codecNotesAlias(notes))
+	var typeErr *ArtifactCodecTypeError
+	if !errors.As(err, &typeErr) {
+		t.Fatalf("Encode(alias) error = %T %v, want ArtifactCodecTypeError", err, err)
+	}
+	if typeErr.ExpectedType == typeErr.ActualType {
+		t.Fatalf("type error = %#v, want distinct exact types", typeErr)
+	}
+}
+
+func TestArtifactCodecRegistryStoresValidatedSchemaMetadata(t *testing.T) {
+	registry := NewArtifactCodecRegistry()
+	codec := notesCodec()
+	codec.kind = " test/notes "
+	codec.schema.ID = " notes.v1 "
+	codec.schema.Name = " notes "
+	codec.schema.Version = " v1 "
+	codec.mediaType = " application/json "
+	if err := RegisterArtifactCodec(registry, codec); err != nil {
+		t.Fatalf("RegisterArtifactCodec() error = %v, want nil", err)
+	}
+	codec.schema.JSONSchema[0] = '['
+
+	spec, ok := registry.Spec("test/notes")
+	if !ok {
+		t.Fatal("Spec() ok = false, want true")
+	}
+	if spec.Kind != "test/notes" || spec.Schema.ID != "notes.v1" || spec.Schema.Name != "notes" || spec.Schema.Version != "v1" || spec.MediaType != "application/json" {
+		t.Fatalf("Spec() = %#v, want normalized metadata", spec)
+	}
+	if spec.SchemaDigest != contracts.DigestArtifactSchema(spec.Schema) {
+		t.Fatalf("schema digest = %q, want %q", spec.SchemaDigest, contracts.DigestArtifactSchema(spec.Schema))
+	}
+
+	spec.Schema.JSONSchema[0] = '['
+	again, _ := registry.Spec("test/notes")
+	if string(again.Schema.JSONSchema) != `{"additionalProperties":false,"properties":{"items":{"items":{"type":"string"},"type":"array"}},"required":["items"],"type":"object"}` {
+		t.Fatalf("stored JSON Schema changed through Spec result: %q", again.Schema.JSONSchema)
+	}
+}
+
+func TestArtifactCodecRegistryRejectsInvalidRegistration(t *testing.T) {
+	tests := []struct {
+		name   string
+		mutate func(*testArtifactCodec[codecNotes])
+		want   string
+	}{
+		{name: "kind", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.kind = " " }, want: "kind"},
+		{name: "schema id", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.ID = "" }, want: "schema id"},
+		{name: "schema name", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.Name = "" }, want: "schema name"},
+		{name: "schema version", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.Version = "" }, want: "schema version"},
+		{name: "media type", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.mediaType = "" }, want: "media type"},
+		{name: "empty JSON Schema", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.JSONSchema = nil }, want: "JSON Schema"},
+		{name: "invalid JSON Schema", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.JSONSchema = []byte(`{"type":`) }, want: "valid JSON"},
+		{name: "non-schema JSON", mutate: func(codec *testArtifactCodec[codecNotes]) { codec.schema.JSONSchema = []byte(`[]`) }, want: "JSON Schema is invalid"},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			registry := NewArtifactCodecRegistry()
+			codec := notesCodec()
+			test.mutate(&codec)
+			if err := RegisterArtifactCodec(registry, codec); err == nil || !strings.Contains(err.Error(), test.want) {
+				t.Fatalf("RegisterArtifactCodec() error = %v, want %q", err, test.want)
+			}
+		})
+	}
+}
+
+func TestArtifactCodecRegistryRejectsDuplicateKind(t *testing.T) {
+	registry := NewArtifactCodecRegistry()
+	if err := RegisterArtifactCodec(registry, notesCodec()); err != nil {
+		t.Fatalf("RegisterArtifactCodec() error = %v, want nil", err)
+	}
+	duplicate := notesCodec()
+	duplicate.kind = " test/notes "
+	if err := RegisterArtifactCodec(registry, duplicate); err == nil || !strings.Contains(err.Error(), "already registered") {
+		t.Fatalf("duplicate registration error = %v, want duplicate kind error", err)
+	}
+}
+
+func TestArtifactCodecRegistryRejectsNilRegistryAndCodec(t *testing.T) {
+	codec := notesCodec()
+	if err := RegisterArtifactCodec[codecNotes](nil, codec); err == nil || !strings.Contains(err.Error(), "registry") {
+		t.Fatalf("nil registry error = %v, want registry error", err)
+	}
+	var nilCodec *testArtifactCodec[codecNotes]
+	if err := RegisterArtifactCodec(NewArtifactCodecRegistry(), nilCodec); err == nil || !strings.Contains(err.Error(), "must not be nil") {
+		t.Fatalf("nil codec error = %v, want codec error", err)
+	}
+}
+
+func TestArtifactCodecRegistryStrictDecodeAndTypedFailures(t *testing.T) {
+	registry := NewArtifactCodecRegistry()
+	if err := RegisterArtifactCodec(registry, notesCodec()); err != nil {
+		t.Fatalf("RegisterArtifactCodec() error = %v, want nil", err)
+	}
+	valid, err := registry.Encode("test/notes", codecNotes{Items: []string{"one"}})
+	if err != nil {
+		t.Fatalf("Encode() error = %v, want nil", err)
+	}
+
+	for _, content := range [][]byte{
+		[]byte(`{"items":["one"],"unknown":true}`),
+		[]byte(`{"items":["one"]} {}`),
+	} {
+		candidate := contracts.CloneSerializedArtifact(valid)
+		candidate.Content = content
+		_, err := registry.Decode(candidate)
+		var operationErr *ArtifactCodecOperationError
+		if !errors.As(err, &operationErr) || operationErr.Operation != "decode" {
+			t.Fatalf("Decode(%q) error = %T %v, want typed decode error", content, err, err)
+		}
+	}
+
+	wrongSchema := contracts.CloneSerializedArtifact(valid)
+	wrongSchema.Schema.Version = "v2"
+	_, err = registry.Decode(wrongSchema)
+	var compatibilityErr *ArtifactCodecCompatibilityError
+	if !errors.As(err, &compatibilityErr) {
+		t.Fatalf("Decode(wrong schema) error = %T %v, want ArtifactCodecCompatibilityError", err, err)
+	}
+}
+
+func TestArtifactCodecRegistryWrapsEncodeFailure(t *testing.T) {
+	codec := notesCodec()
+	cause := errors.New("cannot encode notes")
+	codec.encodeFunc = func(codecNotes) ([]byte, error) { return nil, cause }
+	registry := NewArtifactCodecRegistry()
+	if err := RegisterArtifactCodec(registry, codec); err != nil {
+		t.Fatalf("RegisterArtifactCodec() error = %v, want nil", err)
+	}
+
+	_, err := registry.Encode("test/notes", codecNotes{})
+	var operationErr *ArtifactCodecOperationError
+	if !errors.As(err, &operationErr) || operationErr.Operation != "encode" || !errors.Is(err, cause) {
+		t.Fatalf("Encode() error = %T %v, want typed wrapping encode error", err, err)
+	}
+}
+
+func TestArtifactCodecRegistryClonesCodecBytes(t *testing.T) {
+	shared := []byte(`{"items":["one"]}`)
+	codec := notesCodec()
+	codec.encodeFunc = func(codecNotes) ([]byte, error) { return shared, nil }
+	codec.decodeFunc = func(content []byte) (codecNotes, error) {
+		content[0] = '['
+		return codecNotes{Items: []string{"one"}}, nil
+	}
+	registry := NewArtifactCodecRegistry()
+	if err := RegisterArtifactCodec(registry, codec); err != nil {
+		t.Fatalf("RegisterArtifactCodec() error = %v, want nil", err)
+	}
+
+	artifact, err := registry.Encode("test/notes", codecNotes{})
+	if err != nil {
+		t.Fatalf("Encode() error = %v, want nil", err)
+	}
+	shared[0] = '['
+	if string(artifact.Content) != `{"items":["one"]}` {
+		t.Fatalf("encoded content = %q after codec buffer mutation, want owned bytes", artifact.Content)
+	}
+	before := append([]byte(nil), artifact.Content...)
+	if _, err := registry.Decode(artifact); err != nil {
+		t.Fatalf("Decode() error = %v, want nil", err)
+	}
+	if !bytes.Equal(artifact.Content, before) {
+		t.Fatalf("serialized content changed during decode: %q", artifact.Content)
+	}
+}
+
+func notesCodec() testArtifactCodec[codecNotes] {
+	return testArtifactCodec[codecNotes]{
+		kind: "test/notes",
+		schema: contracts.ArtifactSchema{
+			ID:         "notes.v1",
+			Name:       "notes",
+			Version:    "v1",
+			JSONSchema: []byte(`{"additionalProperties":false,"properties":{"items":{"items":{"type":"string"},"type":"array"}},"required":["items"],"type":"object"}`),
+		},
+		mediaType: "application/json",
+		encodeFunc: func(value codecNotes) ([]byte, error) {
+			return json.Marshal(value)
+		},
+		decodeFunc: func(content []byte) (codecNotes, error) {
+			var value codecNotes
+			return value, decodeStrictJSON(content, &value)
+		},
+	}
+}
+
+func scoreCodec() testArtifactCodec[codecScore] {
+	return testArtifactCodec[codecScore]{
+		kind: "test/score",
+		schema: contracts.ArtifactSchema{
+			ID:         "score.v1",
+			Name:       "score",
+			Version:    "v1",
+			JSONSchema: []byte(`{"additionalProperties":false,"properties":{"value":{"type":"integer"}},"required":["value"],"type":"object"}`),
+		},
+		mediaType: "application/json",
+		encodeFunc: func(value codecScore) ([]byte, error) {
+			return json.Marshal(value)
+		},
+		decodeFunc: func(content []byte) (codecScore, error) {
+			var value codecScore
+			return value, decodeStrictJSON(content, &value)
+		},
+	}
+}
+
+func decodeStrictJSON(content []byte, out any) error {
+	decoder := json.NewDecoder(bytes.NewReader(content))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(out); err != nil {
+		return err
+	}
+	if err := decoder.Decode(&struct{}{}); err != io.EOF {
+		if err == nil {
+			return fmt.Errorf("unexpected trailing JSON value")
+		}
+		return fmt.Errorf("decode trailing JSON: %w", err)
+	}
+	return nil
+}

internal/framework/pipeline/checkpoint.go

@@ -0,0 +1,221 @@
+package pipeline
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"sort"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+)
+
+type CheckpointFingerprint struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}
+
+type CheckpointRecorder interface {
+	SourceRunning(moduleKey string) error
+	SourceSucceeded(moduleKey string, doc *source.SourceDocument) error
+	SourceFailed(moduleKey string, err error) error
+	ChunkRunning(moduleKey string, sourceDigest string) error
+	ChunkSucceeded(moduleKey string, sourceDigest string, chunks []source.Chunk, warnings []contracts.Warning) error
+	ChunkRejected(moduleKey string, sourceDigest string, rejected contracts.RejectedOutput) error
+	ChunkFailed(moduleKey string, sourceDigest string, err error) error
+	ExtractRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
+	ExtractSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, outputs []CheckpointArtifact, rejected []contracts.RejectedOutput, warnings []contracts.Warning) error
+	ExtractFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
+	MergeRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
+	MergeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	MergeRejected(laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
+	MergeFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
+	NormalizeRunning(laneID string, moduleKey string, dependencies []CheckpointFingerprint) error
+	NormalizeSucceeded(laneID string, moduleKey string, dependencies []CheckpointFingerprint, output CheckpointArtifact, warnings []contracts.Warning) error
+	NormalizeRejected(laneID string, moduleKey string, dependencies []CheckpointFingerprint, rejected contracts.RejectedOutput) error
+	NormalizeFailed(laneID string, moduleKey string, dependencies []CheckpointFingerprint, err error) error
+}
+
+type CheckpointDecision struct {
+	Reused bool   `json:"reused"`
+	Reason string `json:"reason,omitempty"`
+}
+
+type CheckpointEvent struct {
+	Stage     string `json:"stage"`
+	LaneID    string `json:"lane_id,omitempty"`
+	ModuleKey string `json:"module_key,omitempty"`
+	Action    string `json:"action"`
+	Reason    string `json:"reason,omitempty"`
+}
+
+type SourceCheckpoint struct {
+	Document *source.SourceDocument
+}
+
+type ChunkCheckpoint struct {
+	Chunks   []source.Chunk
+	Warnings []contracts.Warning
+}
+
+// CheckpointArtifact is the durable, domain-neutral value stored at a lane
+// checkpoint boundary.
+type CheckpointArtifact struct {
+	LaneID       string
+	ModuleKey    string
+	SourceID     string
+	ChunkID      string
+	ChunkIndex   int
+	ChunkRef     source.SourceRef
+	Artifact     contracts.SerializedArtifact
+	SchemaDigest string
+}
+
+type ExtractCheckpoint struct {
+	Outputs  []CheckpointArtifact
+	Rejected []contracts.RejectedOutput
+	Warnings []contracts.Warning
+}
+
+type MergeCheckpoint struct {
+	Output   CheckpointArtifact
+	Warnings []contracts.Warning
+}
+type NormalizeCheckpoint struct {
+	Output   CheckpointArtifact
+	Warnings []contracts.Warning
+}
+
+type CheckpointLoader interface {
+	Enabled() bool
+	Source(moduleKey string) (SourceCheckpoint, CheckpointDecision)
+	Chunk(moduleKey string, sourceDigest string) (ChunkCheckpoint, CheckpointDecision)
+	Extract(laneID string, moduleKey string, dependencies []CheckpointFingerprint) (ExtractCheckpoint, CheckpointDecision)
+	Merge(laneID string, moduleKey string, dependencies []CheckpointFingerprint) (MergeCheckpoint, CheckpointDecision)
+	Normalize(laneID string, moduleKey string, dependencies []CheckpointFingerprint) (NormalizeCheckpoint, CheckpointDecision)
+}
+
+type noopCheckpointRecorder struct{}
+type noopCheckpointLoader struct{}
+
+func NoopCheckpointRecorder() CheckpointRecorder { return noopCheckpointRecorder{} }
+func NoopCheckpointLoader() CheckpointLoader     { return noopCheckpointLoader{} }
+
+func (noopCheckpointRecorder) SourceRunning(string) error                           { return nil }
+func (noopCheckpointRecorder) SourceSucceeded(string, *source.SourceDocument) error { return nil }
+func (noopCheckpointRecorder) SourceFailed(string, error) error                     { return nil }
+func (noopCheckpointRecorder) ChunkRunning(string, string) error                    { return nil }
+func (noopCheckpointRecorder) ChunkSucceeded(string, string, []source.Chunk, []contracts.Warning) error {
+	return nil
+}
+func (noopCheckpointRecorder) ChunkRejected(string, string, contracts.RejectedOutput) error {
+	return nil
+}
+func (noopCheckpointRecorder) ChunkFailed(string, string, error) error { return nil }
+func (noopCheckpointRecorder) ExtractRunning(string, string, []CheckpointFingerprint) error {
+	return nil
+}
+func (noopCheckpointRecorder) ExtractSucceeded(string, string, []CheckpointFingerprint, []CheckpointArtifact, []contracts.RejectedOutput, []contracts.Warning) error {
+	return nil
+}
+func (noopCheckpointRecorder) ExtractFailed(string, string, []CheckpointFingerprint, error) error {
+	return nil
+}
+func (noopCheckpointRecorder) MergeRunning(string, string, []CheckpointFingerprint) error { return nil }
+func (noopCheckpointRecorder) MergeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact, []contracts.Warning) error {
+	return nil
+}
+func (noopCheckpointRecorder) MergeRejected(string, string, []CheckpointFingerprint, contracts.RejectedOutput) error {
+	return nil
+}
+func (noopCheckpointRecorder) MergeFailed(string, string, []CheckpointFingerprint, error) error {
+	return nil
+}
+func (noopCheckpointRecorder) NormalizeRunning(string, string, []CheckpointFingerprint) error {
+	return nil
+}
+func (noopCheckpointRecorder) NormalizeSucceeded(string, string, []CheckpointFingerprint, CheckpointArtifact, []contracts.Warning) error {
+	return nil
+}
+func (noopCheckpointRecorder) NormalizeRejected(string, string, []CheckpointFingerprint, contracts.RejectedOutput) error {
+	return nil
+}
+func (noopCheckpointRecorder) NormalizeFailed(string, string, []CheckpointFingerprint, error) error {
+	return nil
+}
+
+func (noopCheckpointLoader) Enabled() bool { return false }
+func (noopCheckpointLoader) Source(string) (SourceCheckpoint, CheckpointDecision) {
+	return SourceCheckpoint{}, CheckpointDecision{Reason: "checkpoint loading disabled"}
+}
+func (noopCheckpointLoader) Chunk(string, string) (ChunkCheckpoint, CheckpointDecision) {
+	return ChunkCheckpoint{}, CheckpointDecision{Reason: "checkpoint loading disabled"}
+}
+func (noopCheckpointLoader) Extract(string, string, []CheckpointFingerprint) (ExtractCheckpoint, CheckpointDecision) {
+	return ExtractCheckpoint{}, CheckpointDecision{Reason: "checkpoint loading disabled"}
+}
+func (noopCheckpointLoader) Merge(string, string, []CheckpointFingerprint) (MergeCheckpoint, CheckpointDecision) {
+	return MergeCheckpoint{}, CheckpointDecision{Reason: "checkpoint loading disabled"}
+}
+func (noopCheckpointLoader) Normalize(string, string, []CheckpointFingerprint) (NormalizeCheckpoint, CheckpointDecision) {
+	return NormalizeCheckpoint{}, CheckpointDecision{Reason: "checkpoint loading disabled"}
+}
+
+func digestFingerprints(name string, digest string) []CheckpointFingerprint {
+	digest = strings.TrimSpace(digest)
+	if digest == "" {
+		return nil
+	}
+	return []CheckpointFingerprint{{Name: name, Value: digest}}
+}
+
+func joinedChunkDigest(chunks []source.Chunk) (string, error) {
+	if len(chunks) == 0 {
+		return "", nil
+	}
+	values := make([]string, 0, len(chunks))
+	for _, chunk := range chunks {
+		digest, err := source.DigestChunk(chunk)
+		if err != nil {
+			return "", fmt.Errorf("digest chunk %q: %w", chunk.ID, err)
+		}
+		values = append(values, chunk.ID+"="+digest)
+	}
+	sort.Strings(values)
+	sum := sha256.Sum256([]byte(strings.Join(values, "\n")))
+	return "sha256:" + hex.EncodeToString(sum[:]), nil
+}
+
+func normalizeCheckpointFingerprints(values []CheckpointFingerprint) []CheckpointFingerprint {
+	if len(values) == 0 {
+		return nil
+	}
+	byName := make(map[string]string, len(values))
+	for _, value := range values {
+		name := strings.TrimSpace(value.Name)
+		fingerprint := strings.TrimSpace(value.Value)
+		if name == "" || fingerprint == "" {
+			continue
+		}
+		byName[name] = fingerprint
+	}
+	if len(byName) == 0 {
+		return nil
+	}
+	names := make([]string, 0, len(byName))
+	for name := range byName {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	out := make([]CheckpointFingerprint, 0, len(names))
+	for _, name := range names {
+		out = append(out, CheckpointFingerprint{Name: name, Value: byName[name]})
+	}
+	return out
+}
+
+func checkpointContentDigest(content []byte) string {
+	sum := sha256.Sum256(content)
+	return "sha256:" + hex.EncodeToString(sum[:])
+}

internal/framework/pipeline/chunk_validation.go

@@ -0,0 +1,109 @@
+package pipeline
+
+import (
+	"fmt"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+)
+
+func validateAndCanonicalizeChunkResult(doc *source.SourceDocument, chunks []source.Chunk) ([]source.Chunk, error) {
+	if len(chunks) == 0 {
+		return nil, fmt.Errorf("chunks must not be empty")
+	}
+
+	sourceUnitIndexes := make(map[int]int, len(doc.Units))
+	sourceUnits := make(map[int]source.SourceUnit, len(doc.Units))
+	for index, unit := range doc.Units {
+		sourceUnitIndexes[unit.ID] = index
+		sourceUnits[unit.ID] = unit
+	}
+
+	canonicalChunks := make([]source.Chunk, 0, len(chunks))
+	seenChunkIDs := make(map[string]struct{}, len(chunks))
+	for chunkIndex, chunk := range chunks {
+		if strings.TrimSpace(chunk.ID) == "" {
+			return nil, fmt.Errorf("chunk[%d].id must not be empty", chunkIndex)
+		}
+		if _, ok := seenChunkIDs[chunk.ID]; ok {
+			return nil, fmt.Errorf("chunk id %q is duplicated", chunk.ID)
+		}
+		seenChunkIDs[chunk.ID] = struct{}{}
+
+		if chunk.SourceID != doc.ID {
+			return nil, fmt.Errorf("chunk %q source_id %q does not match source document id %q", chunk.ID, chunk.SourceID, doc.ID)
+		}
+		if chunk.Index != chunkIndex {
+			return nil, fmt.Errorf("chunk %q index %d does not match returned order %d", chunk.ID, chunk.Index, chunkIndex)
+		}
+		if len(chunk.Units) == 0 {
+			return nil, fmt.Errorf("chunk %q units must not be empty", chunk.ID)
+		}
+		if len(chunk.Content) == 0 {
+			return nil, fmt.Errorf("chunk %q content must not be empty", chunk.ID)
+		}
+		if strings.TrimSpace(chunk.MediaType) == "" {
+			return nil, fmt.Errorf("chunk %q media_type must not be empty", chunk.ID)
+		}
+		if err := source.ValidateRef(doc, chunk.Ref); err != nil {
+			return nil, fmt.Errorf("chunk %q ref: %w", chunk.ID, err)
+		}
+
+		seenUnitIDs := make(map[int]struct{}, len(chunk.Units))
+		previousSourceIndex := -1
+		canonicalUnits := make([]source.SourceUnit, 0, len(chunk.Units))
+		for unitIndex, unit := range chunk.Units {
+			if unit.ID <= 0 {
+				return nil, fmt.Errorf("chunk %q unit[%d].id must be positive", chunk.ID, unitIndex)
+			}
+			if _, ok := seenUnitIDs[unit.ID]; ok {
+				return nil, fmt.Errorf("chunk %q repeats source unit %d", chunk.ID, unit.ID)
+			}
+			seenUnitIDs[unit.ID] = struct{}{}
+
+			sourceIndex, ok := sourceUnitIndexes[unit.ID]
+			if !ok {
+				return nil, fmt.Errorf("chunk %q source unit %d was not found in source document %q", chunk.ID, unit.ID, doc.ID)
+			}
+			if previousSourceIndex >= 0 && sourceIndex != previousSourceIndex+1 {
+				return nil, fmt.Errorf("chunk %q source units must form a contiguous range in source document order", chunk.ID)
+			}
+			if unit.Ref != sourceUnits[unit.ID].Ref {
+				return nil, fmt.Errorf("chunk %q source unit %d ref does not match source document", chunk.ID, unit.ID)
+			}
+			previousSourceIndex = sourceIndex
+			canonicalUnits = append(canonicalUnits, cloneSourceUnit(sourceUnits[unit.ID]))
+		}
+		expectedRef := source.SourceRef{
+			SourceID:    doc.ID,
+			StartUnitID: canonicalUnits[0].Ref.StartUnitID,
+			EndUnitID:   canonicalUnits[len(canonicalUnits)-1].Ref.EndUnitID,
+		}
+		if chunk.Ref != expectedRef {
+			return nil, fmt.Errorf("chunk %q ref %#v does not match unit span %#v", chunk.ID, chunk.Ref, expectedRef)
+		}
+
+		canonicalChunks = append(canonicalChunks, source.Chunk{
+			ID:        chunk.ID,
+			SourceID:  chunk.SourceID,
+			Index:     chunk.Index,
+			Ref:       expectedRef,
+			Content:   append([]byte(nil), chunk.Content...),
+			MediaType: chunk.MediaType,
+			Units:     canonicalUnits,
+			Metadata:  cloneMetadata(chunk.Metadata),
+		})
+	}
+
+	return canonicalChunks, nil
+}
+
+func cloneSourceUnit(unit source.SourceUnit) source.SourceUnit {
+	return source.SourceUnit{
+		ID:       unit.ID,
+		Kind:     unit.Kind,
+		Text:     unit.Text,
+		Ref:      unit.Ref,
+		Metadata: cloneMetadata(unit.Metadata),
+	}
+}

internal/framework/pipeline/chunker_registry.go

@@ -8,16 +8,19 @@ import (
 )
 
 type ChunkerConstructor func() (contracts.Chunker, error)
+type ChunkerBuilder func(BuildRequest) (contracts.Chunker, error)
 
 type ChunkerRegistry struct {
-	constructors map[string]ChunkerConstructor
-	specs        map[string]ModuleSpec
+	builders         map[string]ChunkerBuilder
+	optionValidators map[string]OptionValidator
+	specs            map[string]ModuleSpec
 }
 
 func NewChunkerRegistry() *ChunkerRegistry {
 	return &ChunkerRegistry{
-		constructors: make(map[string]ChunkerConstructor),
-		specs:        make(map[string]ModuleSpec),
+		builders:         make(map[string]ChunkerBuilder),
+		optionValidators: make(map[string]OptionValidator),
+		specs:            make(map[string]ModuleSpec),
 	}
 }
 
@@ -26,6 +29,15 @@ func (r *ChunkerRegistry) Register(key string, constructor ChunkerConstructor) e
 }
 
 func (r *ChunkerRegistry) RegisterWithSpec(spec ModuleSpec, constructor ChunkerConstructor) error {
+	if constructor == nil {
+		return fmt.Errorf("chunker constructor for %q must not be nil", strings.TrimSpace(spec.Key))
+	}
+	return r.RegisterBuilderWithSpec(spec, rejectUnconfiguredOptions, func(BuildRequest) (contracts.Chunker, error) {
+		return constructor()
+	})
+}
+
+func (r *ChunkerRegistry) RegisterBuilderWithSpec(spec ModuleSpec, validateOptions OptionValidator, builder ChunkerBuilder) error {
 	if r == nil {
 		return fmt.Errorf("chunker registry must not be nil")
 	}
@@ -34,25 +46,36 @@ func (r *ChunkerRegistry) RegisterWithSpec(spec ModuleSpec, constructor ChunkerC
 	if err := validateModuleSpec("chunker", StageChunk, normalizedSpec); err != nil {
 		return err
 	}
-	if constructor == nil {
-		return fmt.Errorf("chunker constructor for %q must not be nil", normalizedSpec.Key)
+	if validateOptions == nil {
+		return fmt.Errorf("chunker option validator for %q must not be nil", normalizedSpec.Key)
 	}
-	if _, ok := r.constructors[normalizedSpec.Key]; ok {
+	if builder == nil {
+		return fmt.Errorf("chunker builder for %q must not be nil", normalizedSpec.Key)
+	}
+	if _, ok := r.builders[normalizedSpec.Key]; ok {
 		return fmt.Errorf("chunker %q is already registered", normalizedSpec.Key)
 	}
 
-	if r.constructors == nil {
-		r.constructors = make(map[string]ChunkerConstructor)
+	if r.builders == nil {
+		r.builders = make(map[string]ChunkerBuilder)
+	}
+	if r.optionValidators == nil {
+		r.optionValidators = make(map[string]OptionValidator)
 	}
 	if r.specs == nil {
 		r.specs = make(map[string]ModuleSpec)
 	}
-	r.constructors[normalizedSpec.Key] = constructor
+	r.builders[normalizedSpec.Key] = builder
+	r.optionValidators[normalizedSpec.Key] = validateOptions
 	r.specs[normalizedSpec.Key] = cloneModuleSpec(normalizedSpec)
 	return nil
 }
 
 func (r *ChunkerRegistry) Build(key string) (contracts.Chunker, error) {
+	return r.BuildWithRequest(key, BuildRequest{})
+}
+
+func (r *ChunkerRegistry) BuildWithRequest(key string, request BuildRequest) (contracts.Chunker, error) {
 	if r == nil {
 		return nil, fmt.Errorf("chunker registry must not be nil")
 	}
@@ -62,12 +85,12 @@ func (r *ChunkerRegistry) Build(key string) (contracts.Chunker, error) {
 		return nil, fmt.Errorf("chunker key must not be empty")
 	}
 
-	constructor, ok := r.constructors[normalizedKey]
+	builder, ok := r.builders[normalizedKey]
 	if !ok {
 		return nil, fmt.Errorf("chunker %q is not registered", normalizedKey)
 	}
 
-	chunker, err := constructor()
+	chunker, err := builder(cloneBuildRequest(request))
 	if err != nil {
 		return nil, fmt.Errorf("build chunker %q: %w", normalizedKey, err)
 	}
@@ -81,6 +104,18 @@ func (r *ChunkerRegistry) Build(key string) (contracts.Chunker, error) {
 	return chunker, nil
 }
 
+func (r *ChunkerRegistry) ValidateOptions(key string, options map[string]any) error {
+	if r == nil {
+		return fmt.Errorf("chunker registry must not be nil")
+	}
+	normalizedKey := strings.TrimSpace(key)
+	validator, ok := r.optionValidators[normalizedKey]
+	if !ok {
+		return fmt.Errorf("chunker %q is not registered", normalizedKey)
+	}
+	return validateRegisteredOptions(validator, options)
+}
+
 func (r *ChunkerRegistry) Spec(key string) (ModuleSpec, bool) {
 	if r == nil {
 		return ModuleSpec{}, false
@@ -98,5 +133,5 @@ func (r *ChunkerRegistry) RegisteredKeys() []string {
 		return nil
 	}
 
-	return sortedRegistryKeys(r.constructors)
+	return sortedRegistryKeys(r.builders)
 }

internal/framework/pipeline/chunker_registry_test.go

@@ -330,34 +330,14 @@ func (chunker registryChunker) Key() string {
 	return chunker.key
 }
 
+func (chunker registryChunker) ReferenceSlots() []contracts.ReferenceSlot {
+	return nil
+}
+
 func (chunker registryChunker) Chunk(ctx context.Context, req contracts.ChunkRequest) (contracts.ChunkResult, error) {
 	return contracts.ChunkResult{}, nil
 }
 
-type registryMerger struct {
-	key string
-}
-
-func (merger registryMerger) Key() string {
-	return merger.key
-}
-
-func (merger registryMerger) Merge(ctx context.Context, req contracts.MergeRequest) (contracts.MergeResult, error) {
-	return contracts.MergeResult{}, nil
-}
-
-type registryNormalizer struct {
-	key string
-}
-
-func (normalizer registryNormalizer) Key() string {
-	return normalizer.key
-}
-
-func (normalizer registryNormalizer) Normalize(ctx context.Context, req contracts.NormalizeRequest) (contracts.NormalizeResult, error) {
-	return contracts.NormalizeResult{}, nil
-}
-
 type registryOutputEncoder struct {
 	key string
 }
@@ -369,15 +349,3 @@ func (encoder registryOutputEncoder) Key() string {
 func (encoder registryOutputEncoder) Encode(ctx context.Context, req contracts.OutputRequest) (contracts.OutputResult, error) {
 	return contracts.OutputResult{}, nil
 }
-
-type registryValidator struct {
-	name string
-}
-
-func (validator registryValidator) Name() string {
-	return validator.name
-}
-
-func (validator registryValidator) Validate(ctx context.Context, req contracts.ValidationRequest) (contracts.ValidationResult, error) {
-	return contracts.ValidationResult{}, nil
-}

internal/framework/pipeline/construction.go

@@ -0,0 +1,69 @@
+package pipeline
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+)
+
+// ModuleDependencies contains run-scoped collaborators shared by constructed
+// modules. Implementations retain only the dependencies they use.
+type ModuleDependencies struct {
+	LLM contracts.StructuredLLMClient
+}
+
+// BuildRequest contains the stable dependencies and configured options used to
+// construct one module or validator for a run.
+type BuildRequest struct {
+	Dependencies ModuleDependencies
+	Options      map[string]any
+}
+
+// OptionValidator validates one module binding without constructing it.
+type OptionValidator func(map[string]any) error
+
+func rejectUnconfiguredOptions(options map[string]any) error {
+	return RejectUnknownOptions(options)
+}
+
+func validateRegisteredOptions(validator OptionValidator, options map[string]any) error {
+	if validator == nil {
+		return fmt.Errorf("option validator must not be nil")
+	}
+	return validator(cloneOptions(options))
+}
+
+func cloneBuildRequest(request BuildRequest) BuildRequest {
+	return BuildRequest{
+		Dependencies: request.Dependencies,
+		Options:      cloneOptions(request.Options),
+	}
+}
+
+// RejectUnknownOptions provides the common strict-map check used by module-
+// owned option decoders. Values remain the implementation's responsibility.
+func RejectUnknownOptions(options map[string]any, allowed ...string) error {
+	known := make(map[string]struct{}, len(allowed))
+	for _, key := range allowed {
+		key = strings.TrimSpace(key)
+		if key != "" {
+			known[key] = struct{}{}
+		}
+	}
+	unknown := make([]string, 0)
+	for key := range options {
+		if _, ok := known[key]; !ok {
+			unknown = append(unknown, key)
+		}
+	}
+	if len(unknown) == 0 {
+		return nil
+	}
+	sort.Strings(unknown)
+	if len(unknown) == 1 {
+		return fmt.Errorf("unknown option %q", unknown[0])
+	}
+	return fmt.Errorf("unknown options %q", unknown)
+}

internal/framework/pipeline/debug.go

@@ -0,0 +1,728 @@
+package pipeline
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"path"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+	"unicode/utf8"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+)
+
+type DebugRecorder interface {
+	Enabled() bool
+	WriteJSON(name string, payload any) error
+	WriteBytes(name string, data []byte) error
+}
+
+type noopDebugRecorder struct{}
+
+func NoopDebugRecorder() DebugRecorder { return noopDebugRecorder{} }
+
+func (noopDebugRecorder) Enabled() bool                   { return false }
+func (noopDebugRecorder) WriteJSON(string, any) error     { return nil }
+func (noopDebugRecorder) WriteBytes(string, []byte) error { return nil }
+func debugPathComponent(value string) string {
+	value = strings.TrimSpace(value)
+	if value == "" {
+		return "_"
+	}
+	var b strings.Builder
+	for _, r := range value {
+		switch {
+		case r >= 'a' && r <= 'z':
+			b.WriteRune(r)
+		case r >= 'A' && r <= 'Z':
+			b.WriteRune(r)
+		case r >= '0' && r <= '9':
+			b.WriteRune(r)
+		case r == '-' || r == '_' || r == '.':
+			b.WriteRune(r)
+		default:
+			b.WriteString(fmt.Sprintf("~%x", r))
+		}
+	}
+	out := b.String()
+	if out == "." || out == ".." || strings.Contains(out, "..") {
+		return "_"
+	}
+	return out
+}
+
+type debugTimedEnvelope struct {
+	Stage       string                  `json:"stage,omitempty"`
+	LaneID      string                  `json:"lane_id,omitempty"`
+	ModuleKey   string                  `json:"module_key,omitempty"`
+	Attempt     int                     `json:"attempt,omitempty"`
+	StartedAt   time.Time               `json:"started_at"`
+	CompletedAt time.Time               `json:"completed_at"`
+	DurationMS  int64                   `json:"duration_ms"`
+	Payload     any                     `json:"payload,omitempty"`
+	LLMCalls    []debugLLMCallReference `json:"llm_calls,omitempty"`
+	Error       string                  `json:"error,omitempty"`
+}
+
+type debugBinaryEnvelope struct {
+	ContentBase64 string              `json:"content_base64,omitempty"`
+	ContentDigest string              `json:"content_digest,omitempty"`
+	MediaType     string              `json:"media_type,omitempty"`
+	Metadata      map[string]any      `json:"metadata,omitempty"`
+	Warnings      []contracts.Warning `json:"warnings,omitempty"`
+}
+
+type debugSourceInput struct {
+	SourceID string              `json:"source_id,omitempty"`
+	Path     string              `json:"path,omitempty"`
+	Raw      debugBinaryEnvelope `json:"raw,omitempty"`
+	Options  map[string]any      `json:"options,omitempty"`
+	Metadata map[string]any      `json:"metadata,omitempty"`
+}
+
+type debugSourceDocument struct {
+	ID       string              `json:"id"`
+	Kind     string              `json:"kind"`
+	Format   string              `json:"format,omitempty"`
+	Digest   string              `json:"digest,omitempty"`
+	Units    []source.SourceUnit `json:"units,omitempty"`
+	Metadata map[string]any      `json:"metadata,omitempty"`
+}
+
+type debugSourceChunk struct {
+	ID       string              `json:"id"`
+	SourceID string              `json:"source_id"`
+	Index    int                 `json:"index"`
+	Ref      source.SourceRef    `json:"ref"`
+	Content  debugBinaryEnvelope `json:"content"`
+	Units    []source.SourceUnit `json:"units,omitempty"`
+	Metadata map[string]any      `json:"metadata,omitempty"`
+}
+
+type debugSerializedOutput struct {
+	LaneID        string                   `json:"lane_id"`
+	NormalizerKey string                   `json:"normalizer_key"`
+	SourceID      string                   `json:"source_id,omitempty"`
+	Kind          contracts.ArtifactKind   `json:"artifact_kind,omitempty"`
+	Schema        contracts.ArtifactSchema `json:"schema"`
+	SchemaDigest  string                   `json:"schema_digest"`
+	Content       debugBinaryEnvelope      `json:"content"`
+}
+
+type debugLLMInputMaterial struct {
+	Name      string `json:"name"`
+	MediaType string `json:"media_type,omitempty"`
+	Content   string `json:"content_base64,omitempty"`
+	Digest    string `json:"digest,omitempty"`
+	OriginURI string `json:"origin_uri,omitempty"`
+	SizeBytes int64  `json:"size_bytes,omitempty"`
+}
+
+type debugStructuredCompletionRequest struct {
+	StageName     string                           `json:"stage_name"`
+	PromptID      string                           `json:"prompt_id,omitempty"`
+	PromptVersion string                           `json:"prompt_version,omitempty"`
+	ProfileID     string                           `json:"profile_id,omitempty"`
+	SessionID     string                           `json:"session_id,omitempty"`
+	Inputs        map[string]debugLLMInputMaterial `json:"inputs,omitempty"`
+	Vars          map[string]any                   `json:"vars,omitempty"`
+}
+
+type debugStructuredCompletionResponse struct {
+	Content          string `json:"content,omitempty"`
+	Provider         string `json:"provider,omitempty"`
+	Model            string `json:"model,omitempty"`
+	ProfileID        string `json:"profile_id,omitempty"`
+	PromptTokens     int    `json:"prompt_tokens,omitempty"`
+	CompletionTokens int    `json:"completion_tokens,omitempty"`
+	TotalTokens      int    `json:"total_tokens,omitempty"`
+}
+
+type debugLLMPromptArtifact struct {
+	CallID string                    `json:"call_id"`
+	Prompt *contracts.LLMDebugPrompt `json:"prompt,omitempty"`
+}
+
+type debugLLMResponseArtifact struct {
+	CallID      string                             `json:"call_id"`
+	Response    *contracts.LLMDebugResponse        `json:"response,omitempty"`
+	Fallback    *debugStructuredCompletionResponse `json:"fallback,omitempty"`
+	ContentPath string                             `json:"content_path,omitempty"`
+	Error       string                             `json:"error,omitempty"`
+}
+
+type debugLLMCallReference struct {
+	CallID              string `json:"call_id"`
+	PromptPath          string `json:"prompt_path,omitempty"`
+	ResponsePath        string `json:"response_path"`
+	ResponseContentPath string `json:"response_content_path,omitempty"`
+	PromptID            string `json:"prompt_id,omitempty"`
+	ProfileID           string `json:"profile_id,omitempty"`
+	Model               string `json:"model,omitempty"`
+	Error               bool   `json:"error,omitempty"`
+}
+
+type debugValidationCall struct {
+	ValidatorName string                     `json:"validator_name"`
+	Request       any                        `json:"request"`
+	Result        contracts.ValidationResult `json:"result,omitempty"`
+	Error         string                     `json:"error,omitempty"`
+}
+
+type debugLLMClient struct {
+	inner    contracts.StructuredLLMClient
+	recorder DebugRecorder
+	mu       sync.Mutex
+	counter  int
+}
+
+type debugLLMScope struct {
+	prefix string
+	parent *debugLLMScope
+	mu     sync.Mutex
+	calls  []debugLLMCallReference
+}
+
+type debugLLMScopeContextKey struct{}
+
+func wrapDebugLLMClient(client contracts.StructuredLLMClient, recorder DebugRecorder) contracts.StructuredLLMClient {
+	if client == nil || recorder == nil || !recorder.Enabled() {
+		return client
+	}
+	if _, ok := client.(*debugLLMClient); ok {
+		return client
+	}
+	return &debugLLMClient{inner: client, recorder: synchronizedDebugRecorder(recorder)}
+}
+
+// WithDebugLLMRecording decorates a shared LLM client so calls made by
+// construction-injected modules participate in the run's debug recording.
+func WithDebugLLMRecording(client contracts.StructuredLLMClient, recorder DebugRecorder) contracts.StructuredLLMClient {
+	return wrapDebugLLMClient(client, recorder)
+}
+
+func (client *debugLLMClient) CompleteStructured(ctx context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
+	client.mu.Lock()
+	client.counter++
+	callID := fmt.Sprintf("%04d", client.counter)
+	client.mu.Unlock()
+
+	started := time.Now().UTC()
+	response, err := client.inner.CompleteStructured(ctx, req, out)
+	completed := time.Now().UTC()
+	errorText := ""
+	if err != nil {
+		errorText = err.Error()
+	}
+
+	scopePrefix := cleanDebugPath(req.StageName)
+	if scopePrefix == "_" {
+		scopePrefix = "llm"
+	}
+	if scope := debugLLMScopeFromContext(ctx); scope != nil {
+		scopePrefix = scope.prefix
+	}
+	promptPath := ""
+	var writeErr error
+	if response.Debug != nil && response.Debug.Prompt != nil {
+		promptPath = path.Join(scopePrefix, "prompt-"+callID+".json")
+		writeErr = errors.Join(writeErr, writeDebugTimed(client.recorder, promptPath, debugTimedEnvelope{
+			Stage:       req.StageName,
+			ModuleKey:   req.StageName,
+			StartedAt:   started,
+			CompletedAt: completed,
+			DurationMS:  completed.Sub(started).Milliseconds(),
+			Payload: debugLLMPromptArtifact{
+				CallID: callID,
+				Prompt: response.Debug.Prompt,
+			},
+		}))
+	}
+	responsePath := path.Join(scopePrefix, "response-"+callID+".json")
+	responseMaterial := debugResponseMaterial(response)
+	fallbackMaterial := debugCompletionFallback(response)
+	responseContentPath, responseForArtifact, fallbackForArtifact, contentErr := writeDebugResponseContent(client.recorder, scopePrefix, callID, responseMaterial, fallbackMaterial)
+	writeErr = errors.Join(writeErr, contentErr)
+	writeErr = errors.Join(writeErr, writeDebugTimed(client.recorder, responsePath, debugTimedEnvelope{
+		Stage:       req.StageName,
+		ModuleKey:   req.StageName,
+		StartedAt:   started,
+		CompletedAt: completed,
+		DurationMS:  completed.Sub(started).Milliseconds(),
+		Payload: debugLLMResponseArtifact{
+			CallID:      callID,
+			Response:    responseForArtifact,
+			Fallback:    fallbackForArtifact,
+			ContentPath: responseContentPath,
+			Error:       errorText,
+		},
+		Error: errorText,
+	}))
+	callRef := debugLLMCallReference{
+		CallID:              callID,
+		PromptPath:          promptPath,
+		ResponsePath:        responsePath,
+		ResponseContentPath: responseContentPath,
+		PromptID:            req.PromptID,
+		ProfileID:           debugFirstNonEmptyString(response.ProfileID, req.ProfileID),
+		Model:               debugFirstNonEmptyString(response.Model, debugResponseModel(response)),
+		Error:               err != nil,
+	}
+	if scope := debugLLMScopeFromContext(ctx); scope != nil {
+		scope.record(callRef)
+	}
+	if err != nil {
+		return response, err
+	}
+	if writeErr != nil {
+		return response, fmt.Errorf("write LLM debug artifact: %w", writeErr)
+	}
+	return response, err
+}
+
+func withDebugLLMScope(ctx context.Context, prefix string) (context.Context, *debugLLMScope) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	prefix = cleanDebugPath(prefix)
+	scope := &debugLLMScope{
+		prefix: prefix,
+		parent: debugLLMScopeFromContext(ctx),
+	}
+	return context.WithValue(ctx, debugLLMScopeContextKey{}, scope), scope
+}
+
+func withIsolatedDebugLLMScope(ctx context.Context, prefix string) (context.Context, *debugLLMScope) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	prefix = cleanDebugPath(prefix)
+	scope := &debugLLMScope{prefix: prefix}
+	return context.WithValue(ctx, debugLLMScopeContextKey{}, scope), scope
+}
+
+func debugLLMScopeFromContext(ctx context.Context) *debugLLMScope {
+	if ctx == nil {
+		return nil
+	}
+	scope, _ := ctx.Value(debugLLMScopeContextKey{}).(*debugLLMScope)
+	return scope
+}
+
+func (scope *debugLLMScope) record(ref debugLLMCallReference) {
+	if scope == nil {
+		return
+	}
+	scope.mu.Lock()
+	scope.calls = append(scope.calls, ref)
+	scope.mu.Unlock()
+	if scope.parent != nil {
+		scope.parent.record(ref)
+	}
+}
+
+func (scope *debugLLMScope) references() []debugLLMCallReference {
+	if scope == nil {
+		return nil
+	}
+	scope.mu.Lock()
+	defer scope.mu.Unlock()
+	if len(scope.calls) == 0 {
+		return nil
+	}
+	out := make([]debugLLMCallReference, len(scope.calls))
+	copy(out, scope.calls)
+	return out
+}
+
+func cleanDebugPath(value string) string {
+	parts := strings.Split(path.Clean(strings.TrimSpace(value)), "/")
+	out := make([]string, 0, len(parts))
+	for _, part := range parts {
+		out = append(out, debugPathComponent(part))
+	}
+	if len(out) == 0 {
+		return "_"
+	}
+	return path.Join(out...)
+}
+
+func debugFirstNonEmptyString(values ...string) string {
+	for _, value := range values {
+		if strings.TrimSpace(value) != "" {
+			return value
+		}
+	}
+	return ""
+}
+
+func (client *debugLLMClient) LLMProfileManifests() []artifacts.LLMProfileManifest {
+	provider, ok := client.inner.(contracts.LLMProfileManifestProvider)
+	if !ok {
+		return nil
+	}
+	return provider.LLMProfileManifests()
+}
+
+func writeDebugTimed(recorder DebugRecorder, name string, envelope debugTimedEnvelope) error {
+	if recorder == nil || !recorder.Enabled() {
+		return nil
+	}
+	if envelope.CompletedAt.IsZero() {
+		envelope.CompletedAt = time.Now().UTC()
+	}
+	if envelope.StartedAt.IsZero() {
+		envelope.StartedAt = envelope.CompletedAt
+	}
+	if envelope.DurationMS == 0 {
+		envelope.DurationMS = envelope.CompletedAt.Sub(envelope.StartedAt).Milliseconds()
+	}
+	return recorder.WriteJSON(name, envelope)
+}
+
+func debugEnvelopeWithLLMCalls(envelope debugTimedEnvelope, scope *debugLLMScope) debugTimedEnvelope {
+	if scope != nil {
+		envelope.LLMCalls = scope.references()
+	}
+	return envelope
+}
+
+func writeDebugAttempt(recorder DebugRecorder, attemptPath string, envelope debugTimedEnvelope, scope *debugLLMScope) error {
+	return writeDebugTimed(recorder, attemptPath+".json", debugEnvelopeWithLLMCalls(envelope, scope))
+}
+
+func debugContentEnvelope(content []byte, mediaType string, metadata map[string]any, warnings []contracts.Warning) debugBinaryEnvelope {
+	content = redactSecretBytes(content)
+	return debugBinaryEnvelope{
+		ContentBase64: base64.StdEncoding.EncodeToString(content),
+		ContentDigest: debugContentDigest(content),
+		MediaType:     mediaType,
+		Metadata:      redactSensitiveMap(metadata),
+		Warnings:      cloneWarnings(warnings),
+	}
+}
+
+func debugSourceDocumentEnvelope(doc *source.SourceDocument) *debugSourceDocument {
+	if doc == nil {
+		return nil
+	}
+	return &debugSourceDocument{
+		ID:       doc.ID,
+		Kind:     doc.Kind,
+		Format:   doc.Format,
+		Digest:   doc.Digest,
+		Units:    cloneSourceUnits(doc.Units),
+		Metadata: redactSensitiveMap(doc.Metadata),
+	}
+}
+
+func debugSourceChunkEnvelope(chunk source.Chunk) debugSourceChunk {
+	return debugSourceChunk{
+		ID:       chunk.ID,
+		SourceID: chunk.SourceID,
+		Index:    chunk.Index,
+		Ref:      chunk.Ref,
+		Content:  debugContentEnvelope(chunk.Content, chunk.MediaType, chunk.Metadata, nil),
+		Units:    cloneSourceUnits(chunk.Units),
+		Metadata: redactSensitiveMap(chunk.Metadata),
+	}
+}
+
+func debugSourceChunkEnvelopes(chunks []source.Chunk) []debugSourceChunk {
+	if len(chunks) == 0 {
+		return nil
+	}
+	out := make([]debugSourceChunk, 0, len(chunks))
+	for _, chunk := range chunks {
+		out = append(out, debugSourceChunkEnvelope(chunk))
+	}
+	return out
+}
+
+func debugSerializedOutputEnvelope(output contracts.SerializedOutput) debugSerializedOutput {
+	schema := contracts.CloneArtifactSchema(output.Artifact.Schema)
+	digest := contracts.DigestArtifactSchema(schema)
+	schema.JSONSchema = nil
+	content := debugContentEnvelope(output.Artifact.Content, output.Artifact.MediaType, output.Artifact.Metadata, nil)
+	content.ContentDigest = debugContentDigest(output.Artifact.Content)
+	return debugSerializedOutput{
+		LaneID: output.LaneID, NormalizerKey: output.NormalizerKey, SourceID: output.SourceID,
+		Kind: output.Artifact.Kind, Schema: schema, SchemaDigest: digest,
+		Content: content,
+	}
+}
+
+func debugSerializedOutputEnvelopes(outputs []contracts.SerializedOutput) []debugSerializedOutput {
+	if len(outputs) == 0 {
+		return nil
+	}
+	out := make([]debugSerializedOutput, 0, len(outputs))
+	for _, output := range outputs {
+		out = append(out, debugSerializedOutputEnvelope(output))
+	}
+	return out
+}
+
+type debugOutputFile struct {
+	Name        string              `json:"name"`
+	ContentType string              `json:"content_type,omitempty"`
+	Content     debugBinaryEnvelope `json:"content"`
+}
+
+func debugOutputFiles(files []contracts.OutputFile) []debugOutputFile {
+	if len(files) == 0 {
+		return nil
+	}
+	out := make([]debugOutputFile, 0, len(files))
+	for _, file := range files {
+		out = append(out, debugOutputFile{
+			Name:        file.Name,
+			ContentType: file.ContentType,
+			Content:     debugContentEnvelope(file.Bytes, file.ContentType, nil, nil),
+		})
+	}
+	return out
+}
+
+func debugCompletionRequest(req contracts.StructuredCompletionRequest) debugStructuredCompletionRequest {
+	inputs := make(map[string]debugLLMInputMaterial, len(req.Inputs))
+	for key, material := range req.Inputs {
+		inputs[key] = debugLLMInputMaterial{
+			Name:      material.Name,
+			MediaType: material.MediaType,
+			Content:   base64.StdEncoding.EncodeToString(redactSecretBytes(material.Content)),
+			Digest:    material.Digest,
+			OriginURI: material.OriginURI,
+			SizeBytes: material.SizeBytes,
+		}
+	}
+	if len(inputs) == 0 {
+		inputs = nil
+	}
+	return debugStructuredCompletionRequest{
+		StageName:     req.StageName,
+		PromptID:      req.PromptID,
+		PromptVersion: req.PromptVersion,
+		ProfileID:     req.ProfileID,
+		SessionID:     req.SessionID,
+		Inputs:        inputs,
+		Vars:          redactSensitiveMap(req.Vars),
+	}
+}
+
+func debugCompletionResponse(response contracts.StructuredCompletionResponse) debugStructuredCompletionResponse {
+	return debugStructuredCompletionResponse{
+		Content:          string(response.Content),
+		Provider:         response.Provider,
+		Model:            response.Model,
+		ProfileID:        response.ProfileID,
+		PromptTokens:     response.PromptTokens,
+		CompletionTokens: response.CompletionTokens,
+		TotalTokens:      response.TotalTokens,
+	}
+}
+
+func debugCompletionFallback(response contracts.StructuredCompletionResponse) *debugStructuredCompletionResponse {
+	if response.Debug != nil && response.Debug.Response != nil {
+		return nil
+	}
+	fallback := debugCompletionResponse(response)
+	if fallback.Content == "" &&
+		fallback.Provider == "" &&
+		fallback.Model == "" &&
+		fallback.ProfileID == "" &&
+		fallback.PromptTokens == 0 &&
+		fallback.CompletionTokens == 0 &&
+		fallback.TotalTokens == 0 {
+		return nil
+	}
+	return &fallback
+}
+
+func writeDebugResponseContent(recorder DebugRecorder, scopePrefix string, callID string, response *contracts.LLMDebugResponse, fallback *debugStructuredCompletionResponse) (string, *contracts.LLMDebugResponse, *debugStructuredCompletionResponse, error) {
+	responseCopy := cloneDebugResponseWithoutContent(response)
+	fallbackCopy := cloneDebugFallbackWithoutContent(fallback)
+	content := ""
+	if response != nil {
+		content = response.Content
+	}
+	if content == "" && fallback != nil {
+		content = fallback.Content
+	}
+	if content == "" {
+		return "", responseCopy, fallbackCopy, nil
+	}
+
+	contentPath, data := debugResponseContentFile(scopePrefix, callID, content)
+	if recorder == nil || !recorder.Enabled() {
+		return contentPath, responseCopy, fallbackCopy, nil
+	}
+	if err := recorder.WriteBytes(contentPath, data); err != nil {
+		return contentPath, responseCopy, fallbackCopy, err
+	}
+	return contentPath, responseCopy, fallbackCopy, nil
+}
+
+func cloneDebugResponseWithoutContent(response *contracts.LLMDebugResponse) *contracts.LLMDebugResponse {
+	if response == nil {
+		return nil
+	}
+	clone := *response
+	clone.Content = ""
+	return &clone
+}
+
+func cloneDebugFallbackWithoutContent(fallback *debugStructuredCompletionResponse) *debugStructuredCompletionResponse {
+	if fallback == nil {
+		return nil
+	}
+	clone := *fallback
+	clone.Content = ""
+	return &clone
+}
+
+func debugResponseContentFile(scopePrefix string, callID string, content string) (string, []byte) {
+	raw := []byte(content)
+	if json.Valid(raw) {
+		var formatted bytes.Buffer
+		if err := json.Indent(&formatted, raw, "", "  "); err == nil {
+			formatted.WriteByte('\n')
+			return path.Join(scopePrefix, "response-content-"+callID+".json"), formatted.Bytes()
+		}
+	}
+	return path.Join(scopePrefix, "response-content-"+callID+".txt"), raw
+}
+
+func debugResponseMaterial(response contracts.StructuredCompletionResponse) *contracts.LLMDebugResponse {
+	if response.Debug == nil {
+		return nil
+	}
+	return response.Debug.Response
+}
+
+func debugResponseModel(response contracts.StructuredCompletionResponse) string {
+	if response.Debug == nil || response.Debug.Response == nil {
+		return ""
+	}
+	return response.Debug.Response.ModelName
+}
+
+func debugValidationResultEnvelope(result contracts.ValidationResult) contracts.ValidationResult {
+	result.Message = string(redactSecretBytes([]byte(result.Message)))
+	result.DiagnosticArtifactPath = string(redactSecretBytes([]byte(result.DiagnosticArtifactPath)))
+	for i := range result.Warnings {
+		result.Warnings[i].Message = string(redactSecretBytes([]byte(result.Warnings[i].Message)))
+	}
+	return result
+}
+
+func debugWarningEnvelopes(warnings []contracts.Warning) []contracts.Warning {
+	out := cloneWarnings(warnings)
+	for i := range out {
+		out[i].Message = string(redactSecretBytes([]byte(out[i].Message)))
+	}
+	return out
+}
+
+func debugRejectedOutputEnvelope(rejected contracts.RejectedOutput) contracts.RejectedOutput {
+	rejected.Message = string(redactSecretBytes([]byte(rejected.Message)))
+	rejected.DiagnosticArtifactPath = string(redactSecretBytes([]byte(rejected.DiagnosticArtifactPath)))
+	return rejected
+}
+
+func debugRejectedOutputPtr(rejected *contracts.RejectedOutput) any {
+	if rejected == nil {
+		return nil
+	}
+	out := debugRejectedOutputEnvelope(*rejected)
+	return out
+}
+
+func debugRejectedOutputEnvelopes(rejected []contracts.RejectedOutput) []contracts.RejectedOutput {
+	if len(rejected) == 0 {
+		return nil
+	}
+	out := make([]contracts.RejectedOutput, 0, len(rejected))
+	for _, item := range rejected {
+		out = append(out, debugRejectedOutputEnvelope(item))
+	}
+	return out
+}
+
+func debugContentDigest(content []byte) string {
+	sum := sha256.Sum256(content)
+	return "sha256:" + hex.EncodeToString(sum[:])
+}
+
+var secretPatterns = []*regexp.Regexp{
+	regexp.MustCompile(`(?i)bearer\s+[a-z0-9._~+/=-]{8,}`),
+	regexp.MustCompile(`(?i)sk-[a-z0-9_-]{8,}`),
+}
+
+func redactSecretBytes(content []byte) []byte {
+	if len(content) == 0 || !utf8.Valid(content) {
+		return append([]byte(nil), content...)
+	}
+	text := string(content)
+	for _, pattern := range secretPatterns {
+		text = pattern.ReplaceAllString(text, "[REDACTED]")
+	}
+	return []byte(text)
+}
+
+func redactSensitiveMap(values map[string]any) map[string]any {
+	if len(values) == 0 {
+		return nil
+	}
+	out := make(map[string]any, len(values))
+	for key, value := range values {
+		if sensitiveKey(key) {
+			out[key] = "[REDACTED]"
+			continue
+		}
+		out[key] = redactSensitiveValue(value)
+	}
+	return out
+}
+
+func redactSensitiveValue(value any) any {
+	switch typed := value.(type) {
+	case string:
+		return string(redactSecretBytes([]byte(typed)))
+	case map[string]any:
+		return redactSensitiveMap(typed)
+	case map[string]string:
+		out := make(map[string]string, len(typed))
+		for key, value := range typed {
+			if sensitiveKey(key) {
+				out[key] = "[REDACTED]"
+			} else {
+				out[key] = string(redactSecretBytes([]byte(value)))
+			}
+		}
+		return out
+	default:
+		return value
+	}
+}
+
+func sensitiveKey(key string) bool {
+	key = strings.ToLower(key)
+	return strings.Contains(key, "api_key") ||
+		strings.Contains(key, "apikey") ||
+		strings.Contains(key, "authorization") ||
+		strings.Contains(key, "bearer") ||
+		strings.Contains(key, "password") ||
+		strings.Contains(key, "secret") ||
+		strings.Contains(key, "token")
+}

internal/framework/pipeline/debug_test.go

@@ -0,0 +1,51 @@
+package pipeline
+
+import (
+	"encoding/json"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+)
+
+func TestDebugSourceDocumentPreservesUnitReferences(t *testing.T) {
+	doc := validSourceDocument()
+	envelope := debugSourceDocumentEnvelope(doc)
+	encoded, err := json.Marshal(envelope)
+	if err != nil {
+		t.Fatalf("Marshal(debug source document) error = %v, want nil", err)
+	}
+
+	var decoded debugSourceDocument
+	if err := json.Unmarshal(encoded, &decoded); err != nil {
+		t.Fatalf("Unmarshal(debug source document) error = %v, want nil", err)
+	}
+	if got, want := decoded.Units[0].Ref, (source.SourceRef{SourceID: "source-1", StartUnitID: 1, EndUnitID: 1}); got != want {
+		t.Fatalf("debug source unit ref = %#v, want %#v", got, want)
+	}
+
+	envelope.Units[0].Ref.SourceID = "mutated"
+	if got := doc.Units[0].Ref.SourceID; got != "source-1" {
+		t.Fatalf("source document ref = %q after debug mutation, want source-1", got)
+	}
+}
+
+func TestDebugSourceChunkPreservesReference(t *testing.T) {
+	doc := validSourceDocument()
+	chunk := source.Chunk{
+		ID: "chunk-1", SourceID: doc.ID, Index: 0,
+		Ref:     source.SourceRef{SourceID: doc.ID, StartUnitID: 1, EndUnitID: 1},
+		Content: []byte("chunk content"), MediaType: "text/plain", Units: doc.Units[:1],
+	}
+	envelope := debugSourceChunkEnvelope(chunk)
+	encoded, err := json.Marshal(envelope)
+	if err != nil {
+		t.Fatalf("Marshal(debug source chunk) error = %v, want nil", err)
+	}
+	var decoded debugSourceChunk
+	if err := json.Unmarshal(encoded, &decoded); err != nil {
+		t.Fatalf("Unmarshal(debug source chunk) error = %v, want nil", err)
+	}
+	if decoded.Ref != chunk.Ref {
+		t.Fatalf("debug chunk ref = %#v, want %#v", decoded.Ref, chunk.Ref)
+	}
+}

internal/framework/pipeline/default_modules_test.go

@@ -2,16 +2,17 @@ package pipeline_test
 
 import (
 	"context"
+	"encoding/json"
 	"testing"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/chunk/generic"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/merge/appendorder"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/normalize/noop"
-	jsonoutput "gitea.maximumdirect.net/eric/notarius/internal/modules/output/json"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/chunk/units"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/merge/appendorder"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/normalize/noop"
+	jsonoutput "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/output/json"
 )
 
 func TestPipelineConfigResolvesWithProductionDefaultsRegistered(t *testing.T) {
@@ -34,8 +35,8 @@ func TestPipelineConfigResolvesWithProductionDefaultsRegistered(t *testing.T) {
 	}
 
 	pipeline := resolved.ResolvedPipeline
-	if pipeline.Chunk.Module != generic.Key {
-		t.Fatalf("Chunk.Module = %q, want %q", pipeline.Chunk.Module, generic.Key)
+	if pipeline.Chunk.Module != units.Key {
+		t.Fatalf("Chunk.Module = %q, want %q", pipeline.Chunk.Module, units.Key)
 	}
 	if pipeline.Output.Module != jsonoutput.Key {
 		t.Fatalf("Output.Module = %q, want %q", pipeline.Output.Module, jsonoutput.Key)
@@ -68,36 +69,48 @@ func defaultModuleCatalog(t *testing.T) pipeline.ModuleCatalog {
 	}); err != nil {
 		t.Fatalf("register input: %v", err)
 	}
-	if err := generic.Register(chunkers); err != nil {
+	if err := units.Register(chunkers); err != nil {
 		t.Fatalf("register generic chunker: %v", err)
 	}
-	if err := extractors.RegisterWithSpec(pipeline.ModuleSpec{
-		Key:      "extract",
-		Stage:    pipeline.StageExtract,
-		Requires: []string{"chunks"},
-		Provides: []string{"records"},
-	}, func() (contracts.Extractor, error) {
+	if err := pipeline.RegisterExtractor[defaultArtifact](extractors, pipeline.ModuleSpec{
+		Key:          "extract",
+		Stage:        pipeline.StageExtract,
+		ArtifactKind: defaultArtifactKind,
+		Requires:     []string{"chunks"},
+		Provides:     []string{"records"},
+	}, func() (contracts.Extractor[defaultArtifact], error) {
 		return defaultExtractor{}, nil
 	}); err != nil {
 		t.Fatalf("register extractor: %v", err)
 	}
-	if err := appendorder.Register(mergers); err != nil {
+	if err := appendorder.RegisterTyped(mergers, defaultArtifactKind, func(values []defaultArtifact) (defaultArtifact, error) {
+		if len(values) == 0 {
+			return defaultArtifact{}, nil
+		}
+		return values[0], nil
+	}); err != nil {
 		t.Fatalf("register appendorder merger: %v", err)
 	}
-	if err := noop.Register(normalizers); err != nil {
+	if err := noop.RegisterTyped[defaultArtifact](normalizers, defaultArtifactKind); err != nil {
 		t.Fatalf("register noop normalizer: %v", err)
 	}
 	if err := jsonoutput.Register(outputs); err != nil {
 		t.Fatalf("register json output: %v", err)
 	}
 
+	codecs := pipeline.NewArtifactCodecRegistry()
+	if err := pipeline.RegisterArtifactCodec(codecs, defaultArtifactCodec{}); err != nil {
+		t.Fatalf("register artifact codec: %v", err)
+	}
 	return pipeline.ModuleCatalog{
-		Inputs:      inputs,
-		Chunkers:    chunkers,
-		Extractors:  extractors,
-		Mergers:     mergers,
-		Normalizers: normalizers,
-		Outputs:     outputs,
+		Inputs:          inputs,
+		Chunkers:        chunkers,
+		ArtifactCodecs:  codecs,
+		Extractors:      extractors,
+		Mergers:         mergers,
+		Normalizers:     normalizers,
+		ValidatorChains: pipeline.NewValidatorChainRegistry(),
+		Outputs:         outputs,
 	}
 }
 
@@ -113,12 +126,27 @@ type defaultExtractor struct{}
 
 func (defaultExtractor) Key() string { return "extract" }
 
-func (defaultExtractor) ArtifactType() string { return "record" }
+func (defaultExtractor) ReferenceSlots() []contracts.ReferenceSlot { return nil }
 
-func (defaultExtractor) SchemaVersion() string { return "v1" }
-
-func (defaultExtractor) Validators() []contracts.Validator { return nil }
-
-func (defaultExtractor) Extract(ctx context.Context, req contracts.ExtractionRequest) (contracts.ExtractionResult, error) {
-	return contracts.ExtractionResult{}, nil
+func (defaultExtractor) Extract(ctx context.Context, req contracts.TypedExtractionRequest) (contracts.TypedExtractionResult[defaultArtifact], error) {
+	return contracts.TypedExtractionResult[defaultArtifact]{}, nil
+}
+
+const defaultArtifactKind contracts.ArtifactKind = "test/default"
+
+type defaultArtifact struct {
+	Value string `json:"value"`
+}
+type defaultArtifactCodec struct{}
+
+func (defaultArtifactCodec) Kind() contracts.ArtifactKind { return defaultArtifactKind }
+func (defaultArtifactCodec) Schema() contracts.ArtifactSchema {
+	return contracts.ArtifactSchema{ID: "urn:notarius:test:default", Name: "default", Version: "1", JSONSchema: []byte(`{"type":"object"}`)}
+}
+func (defaultArtifactCodec) MediaType() string                            { return "application/json" }
+func (defaultArtifactCodec) Encode(value defaultArtifact) ([]byte, error) { return json.Marshal(value) }
+func (defaultArtifactCodec) Decode(content []byte) (defaultArtifact, error) {
+	var value defaultArtifact
+	err := json.Unmarshal(content, &value)
+	return value, err
 }

internal/framework/pipeline/extractor_registry.go

@@ -1,102 +1,108 @@
 package pipeline
 
 import (
+	"context"
 	"fmt"
+	"reflect"
 	"strings"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 )
 
-type ExtractorConstructor func() (contracts.Extractor, error)
-
 type ExtractorRegistry struct {
-	constructors map[string]ExtractorConstructor
+	typedEntries map[string]typedExtractorEntry
 	specs        map[string]ModuleSpec
 }
 
+type typedExtractorEntry struct {
+	spec            ModuleSpec
+	valueType       reflect.Type
+	validateOptions OptionValidator
+	builder         func(BuildRequest) (any, error)
+	extract         typedExtractOperation
+}
+
 func NewExtractorRegistry() *ExtractorRegistry {
-	return &ExtractorRegistry{
-		constructors: make(map[string]ExtractorConstructor),
-		specs:        make(map[string]ModuleSpec),
+	return &ExtractorRegistry{typedEntries: map[string]typedExtractorEntry{}, specs: map[string]ModuleSpec{}}
+}
+
+func RegisterExtractor[T any](registry *ExtractorRegistry, spec ModuleSpec, constructor func() (contracts.Extractor[T], error)) error {
+	if constructor == nil {
+		return fmt.Errorf("extractor constructor for %q must not be nil", strings.TrimSpace(spec.Key))
 	}
+	return RegisterExtractorBuilder(registry, spec, rejectUnconfiguredOptions, func(BuildRequest) (contracts.Extractor[T], error) { return constructor() })
 }
 
-func (r *ExtractorRegistry) Register(key string, constructor ExtractorConstructor) error {
-	return r.RegisterWithSpec(defaultModuleSpec(key, StageExtract), constructor)
-}
-
-func (r *ExtractorRegistry) RegisterWithSpec(spec ModuleSpec, constructor ExtractorConstructor) error {
-	if r == nil {
+func RegisterExtractorBuilder[T any](registry *ExtractorRegistry, spec ModuleSpec, validateOptions OptionValidator, builder func(BuildRequest) (contracts.Extractor[T], error)) error {
+	if registry == nil {
 		return fmt.Errorf("extractor registry must not be nil")
 	}
-
-	normalizedSpec := normalizeModuleSpec(spec)
-	if err := validateModuleSpec("extractor", StageExtract, normalizedSpec); err != nil {
+	normalized := normalizeModuleSpec(spec)
+	if err := validateModuleSpec("extractor", StageExtract, normalized); err != nil {
 		return err
 	}
-	if constructor == nil {
-		return fmt.Errorf("extractor constructor for %q must not be nil", normalizedSpec.Key)
+	if normalized.ArtifactKind == "" {
+		return fmt.Errorf("typed extractor %q artifact kind must not be empty", normalized.Key)
 	}
-	if _, ok := r.constructors[normalizedSpec.Key]; ok {
-		return fmt.Errorf("extractor %q is already registered", normalizedSpec.Key)
+	if validateOptions == nil {
+		return fmt.Errorf("extractor option validator for %q must not be nil", normalized.Key)
 	}
-
-	if r.constructors == nil {
-		r.constructors = make(map[string]ExtractorConstructor)
+	if builder == nil {
+		return fmt.Errorf("extractor builder for %q must not be nil", normalized.Key)
 	}
-	if r.specs == nil {
-		r.specs = make(map[string]ModuleSpec)
+	if _, ok := registry.specs[normalized.Key]; ok {
+		return fmt.Errorf("extractor %q is already registered", normalized.Key)
 	}
-	r.constructors[normalizedSpec.Key] = constructor
-	r.specs[normalizedSpec.Key] = cloneModuleSpec(normalizedSpec)
+	entry := typedExtractorEntry{spec: cloneModuleSpec(normalized), valueType: reflect.TypeFor[T](), validateOptions: validateOptions, builder: func(request BuildRequest) (any, error) { return builder(cloneBuildRequest(request)) }, extract: func(ctx context.Context, implementation any, request contracts.TypedExtractionRequest) (erasedTypedResult, error) {
+		extractor, ok := implementation.(contracts.Extractor[T])
+		if !ok {
+			return erasedTypedResult{}, fmt.Errorf("extractor %q has incompatible implementation %T", normalized.Key, implementation)
+		}
+		result, err := extractor.Extract(ctx, request)
+		if err != nil {
+			return erasedTypedResult{}, err
+		}
+		return erasedTypedResult{Value: result.Value, Warnings: result.Warnings}, nil
+	}}
+	if registry.typedEntries == nil {
+		registry.typedEntries = map[string]typedExtractorEntry{}
+	}
+	if registry.specs == nil {
+		registry.specs = map[string]ModuleSpec{}
+	}
+	registry.typedEntries[normalized.Key] = entry
+	registry.specs[normalized.Key] = cloneModuleSpec(normalized)
 	return nil
 }
 
-func (r *ExtractorRegistry) Build(key string) (contracts.Extractor, error) {
+func (r *ExtractorRegistry) validateOptions(key string, options map[string]any) error {
 	if r == nil {
-		return nil, fmt.Errorf("extractor registry must not be nil")
+		return fmt.Errorf("extractor registry must not be nil")
 	}
-
-	normalizedKey := strings.TrimSpace(key)
-	if normalizedKey == "" {
-		return nil, fmt.Errorf("extractor key must not be empty")
-	}
-
-	constructor, ok := r.constructors[normalizedKey]
+	normalized := strings.TrimSpace(key)
+	entry, ok := r.typedEntries[normalized]
 	if !ok {
-		return nil, fmt.Errorf("extractor %q is not registered", normalizedKey)
+		return fmt.Errorf("extractor %q is not registered", normalized)
 	}
-
-	extractor, err := constructor()
-	if err != nil {
-		return nil, fmt.Errorf("build extractor %q: %w", normalizedKey, err)
-	}
-	if extractor == nil {
-		return nil, fmt.Errorf("extractor %q constructor returned nil", normalizedKey)
-	}
-	if extractor.Key() != normalizedKey {
-		return nil, fmt.Errorf("extractor %q returned key %q", normalizedKey, extractor.Key())
-	}
-
-	return extractor, nil
+	return validateRegisteredOptions(entry.validateOptions, options)
 }
-
 func (r *ExtractorRegistry) Spec(key string) (ModuleSpec, bool) {
 	if r == nil {
 		return ModuleSpec{}, false
 	}
-
 	spec, ok := r.specs[strings.TrimSpace(key)]
-	if !ok {
-		return ModuleSpec{}, false
-	}
-	return cloneModuleSpec(spec), true
+	return cloneModuleSpec(spec), ok
+}
+func (r *ExtractorRegistry) typedEntry(key string) (typedExtractorEntry, bool) {
+	if r == nil {
+		return typedExtractorEntry{}, false
+	}
+	entry, ok := r.typedEntries[strings.TrimSpace(key)]
+	return entry, ok
 }
-
 func (r *ExtractorRegistry) RegisteredKeys() []string {
 	if r == nil {
 		return nil
 	}
-
-	return sortedRegistryKeys(r.constructors)
+	return sortedRegistryKeys(r.specs)
 }

internal/framework/pipeline/extractor_registry_test.go

@@ -1,310 +0,0 @@
-package pipeline
-
-import (
-	"context"
-	"errors"
-	"reflect"
-	"strings"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-)
-
-func TestExtractorRegistryRegisterAndBuild(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	if err := registry.Register("generic-extractor", fakeExtractorConstructor("generic-extractor")); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	extractor, err := registry.Build("generic-extractor")
-	if err != nil {
-		t.Fatalf("Build() error = %v, want nil", err)
-	}
-	if extractor.Key() != "generic-extractor" {
-		t.Fatalf("extractor.Key() = %q, want generic-extractor", extractor.Key())
-	}
-}
-
-func TestExtractorRegistryRegisterAndBuildTrimKeys(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	if err := registry.Register(" generic-extractor ", fakeExtractorConstructor("generic-extractor")); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	extractor, err := registry.Build("\tgeneric-extractor\n")
-	if err != nil {
-		t.Fatalf("Build() error = %v, want nil", err)
-	}
-	if extractor.Key() != "generic-extractor" {
-		t.Fatalf("extractor.Key() = %q, want generic-extractor", extractor.Key())
-	}
-}
-
-func TestExtractorRegistryRegisterWithSpecStoresMetadata(t *testing.T) {
-	registry := NewExtractorRegistry()
-	spec := ModuleSpec{
-		Key:      " generic-extractor ",
-		Stage:    StageExtract,
-		Provides: []string{" generic-artifact ", "source-citations", "generic-artifact", ""},
-		Requires: []string{" source-document ", "source-document", ""},
-	}
-
-	if err := registry.RegisterWithSpec(spec, fakeExtractorConstructor("generic-extractor")); err != nil {
-		t.Fatalf("RegisterWithSpec() error = %v, want nil", err)
-	}
-
-	got, ok := registry.Spec("\tgeneric-extractor\n")
-	if !ok {
-		t.Fatal("Spec() ok = false, want true")
-	}
-	want := ModuleSpec{
-		Key:      "generic-extractor",
-		Stage:    StageExtract,
-		Provides: []string{"generic-artifact", "source-citations"},
-		Requires: []string{"source-document"},
-	}
-	if !reflect.DeepEqual(got, want) {
-		t.Fatalf("Spec() = %#v, want %#v", got, want)
-	}
-
-	got.Provides[0] = "changed"
-	again, ok := registry.Spec("generic-extractor")
-	if !ok {
-		t.Fatal("Spec() after caller mutation ok = false, want true")
-	}
-	if !reflect.DeepEqual(again, want) {
-		t.Fatalf("Spec() after caller mutation = %#v, want %#v", again, want)
-	}
-}
-
-func TestExtractorRegistryRegisterStoresDefaultSpec(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	if err := registry.Register(" generic-extractor ", fakeExtractorConstructor("generic-extractor")); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	got, ok := registry.Spec("generic-extractor")
-	if !ok {
-		t.Fatal("Spec() ok = false, want true")
-	}
-	want := ModuleSpec{Key: "generic-extractor", Stage: StageExtract}
-	if !reflect.DeepEqual(got, want) {
-		t.Fatalf("Spec() = %#v, want %#v", got, want)
-	}
-}
-
-func TestExtractorRegistryRegisterWithSpecRejectsWrongStage(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	err := registry.RegisterWithSpec(ModuleSpec{Key: "generic-extractor", Stage: StageInput}, fakeExtractorConstructor("generic-extractor"))
-
-	if err == nil {
-		t.Fatal("RegisterWithSpec() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "stage") {
-		t.Fatalf("RegisterWithSpec() error = %q, want stage error", err.Error())
-	}
-}
-
-func TestExtractorRegistrySpecRejectsUnknownKey(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	if _, ok := registry.Spec("missing-extractor"); ok {
-		t.Fatal("Spec() ok = true, want false")
-	}
-}
-
-func TestExtractorRegistryRegisterRejectsEmptyKey(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	err := registry.Register(" \t", fakeExtractorConstructor("generic-extractor"))
-
-	if err == nil {
-		t.Fatal("Register() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "key must not be empty") {
-		t.Fatalf("Register() error = %q, want empty key error", err.Error())
-	}
-}
-
-func TestExtractorRegistryRegisterRejectsDuplicateKey(t *testing.T) {
-	registry := NewExtractorRegistry()
-	if err := registry.Register("generic-extractor", fakeExtractorConstructor("generic-extractor")); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	err := registry.Register(" generic-extractor ", fakeExtractorConstructor("generic-extractor"))
-
-	if err == nil {
-		t.Fatal("Register() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "already registered") {
-		t.Fatalf("Register() error = %q, want duplicate key error", err.Error())
-	}
-}
-
-func TestExtractorRegistryRegisterRejectsNilConstructor(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	err := registry.Register("generic-extractor", nil)
-
-	if err == nil {
-		t.Fatal("Register() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "constructor") {
-		t.Fatalf("Register() error = %q, want constructor error", err.Error())
-	}
-}
-
-func TestExtractorRegistryBuildRejectsUnknownKey(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	_, err := registry.Build("missing-extractor")
-
-	if err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "not registered") {
-		t.Fatalf("Build() error = %q, want unknown key error", err.Error())
-	}
-}
-
-func TestExtractorRegistryBuildWrapsConstructorError(t *testing.T) {
-	registry := NewExtractorRegistry()
-	constructorErr := errors.New("constructor failed")
-	if err := registry.Register("generic-extractor", func() (contracts.Extractor, error) {
-		return nil, constructorErr
-	}); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	_, err := registry.Build("generic-extractor")
-
-	if err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if !errors.Is(err, constructorErr) {
-		t.Fatalf("Build() error = %v, want wrapped constructor error", err)
-	}
-	if !strings.Contains(err.Error(), "generic-extractor") {
-		t.Fatalf("Build() error = %q, want key context", err.Error())
-	}
-}
-
-func TestExtractorRegistryBuildRejectsNilExtractor(t *testing.T) {
-	registry := NewExtractorRegistry()
-	if err := registry.Register("generic-extractor", func() (contracts.Extractor, error) {
-		return nil, nil
-	}); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	_, err := registry.Build("generic-extractor")
-
-	if err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "returned nil") {
-		t.Fatalf("Build() error = %q, want nil extractor error", err.Error())
-	}
-}
-
-func TestExtractorRegistryBuildRejectsExtractorKeyMismatch(t *testing.T) {
-	registry := NewExtractorRegistry()
-	if err := registry.Register("generic-extractor", fakeExtractorConstructor("other-extractor")); err != nil {
-		t.Fatalf("Register() error = %v, want nil", err)
-	}
-
-	_, err := registry.Build("generic-extractor")
-
-	if err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "returned key") {
-		t.Fatalf("Build() error = %q, want key mismatch error", err.Error())
-	}
-}
-
-func TestExtractorRegistryRegisteredKeysReturnsSortedCopy(t *testing.T) {
-	registry := NewExtractorRegistry()
-	for _, key := range []string{"zeta", "alpha", "middle"} {
-		if err := registry.Register(key, fakeExtractorConstructor(key)); err != nil {
-			t.Fatalf("Register(%q) error = %v, want nil", key, err)
-		}
-	}
-
-	keys := registry.RegisteredKeys()
-
-	want := []string{"alpha", "middle", "zeta"}
-	if !reflect.DeepEqual(keys, want) {
-		t.Fatalf("RegisteredKeys() = %#v, want %#v", keys, want)
-	}
-
-	keys[0] = "changed"
-	if got := registry.RegisteredKeys(); !reflect.DeepEqual(got, want) {
-		t.Fatalf("RegisteredKeys() after caller mutation = %#v, want %#v", got, want)
-	}
-}
-
-func TestExtractorRegistryNilRegistryBehavior(t *testing.T) {
-	var registry *ExtractorRegistry
-
-	if err := registry.Register("generic-extractor", fakeExtractorConstructor("generic-extractor")); err == nil {
-		t.Fatal("Register() error = nil, want error")
-	}
-	if _, err := registry.Build("generic-extractor"); err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if _, ok := registry.Spec("generic-extractor"); ok {
-		t.Fatal("Spec() ok = true, want false")
-	}
-	if keys := registry.RegisteredKeys(); keys != nil {
-		t.Fatalf("RegisteredKeys() = %#v, want nil", keys)
-	}
-}
-
-func TestExtractorRegistryBuildRejectsEmptyKey(t *testing.T) {
-	registry := NewExtractorRegistry()
-
-	_, err := registry.Build(" \n")
-
-	if err == nil {
-		t.Fatal("Build() error = nil, want error")
-	}
-	if !strings.Contains(err.Error(), "key must not be empty") {
-		t.Fatalf("Build() error = %q, want empty key error", err.Error())
-	}
-}
-
-type registryFakeExtractor struct {
-	key string
-}
-
-func fakeExtractorConstructor(key string) ExtractorConstructor {
-	return func() (contracts.Extractor, error) {
-		return registryFakeExtractor{key: key}, nil
-	}
-}
-
-func (extractor registryFakeExtractor) Key() string {
-	return extractor.key
-}
-
-func (extractor registryFakeExtractor) ArtifactType() string {
-	return "generic-artifact"
-}
-
-func (extractor registryFakeExtractor) SchemaVersion() string {
-	return "v1"
-}
-
-func (extractor registryFakeExtractor) Validators() []contracts.Validator {
-	return nil
-}
-
-func (extractor registryFakeExtractor) Extract(ctx context.Context, req contracts.ExtractionRequest) (contracts.ExtractionResult, error) {
-	return contracts.ExtractionResult{}, nil
-}