diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
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+++ b/docs/roadmap/implementation.md
@@ -0,0 +1,586 @@
+# PromptKit v0.5 Implementation Plan
+
+## Objective
+
+Implement the target state in
+[PromptKit v0.5 Integration And LLM Profile Policy](promptkit.md). Each numbered
+stage is intended to be one implementation prompt for a GPT-5.6-Terra coding
+agent. Complete stages in order and leave the repository buildable, tested, and
+internally coherent after every stage.
+
+Follow [Architecture](../policy/architecture.md),
+[Testing Policy](../policy/testing.md), and
+[Documentation Policy](../policy/documentation.md) throughout. Preserve
+unrelated user changes. Use `apply_patch` for source and documentation edits,
+run `gofmt` on changed Go files, and add only tests that protect the behaviors
+and risks assigned to that stage.
+
+Do not implement the separate deterministic session-ID or default-concurrency
+roadmap items as part of this plan. Do not perform paid or credentialed LLM
+calls.
+
+## Background Summary
+
+Notarius currently pins PromptKit v0.3.0, calls `Prepare` and then `Run` for one
+completion, validates profiles through a synthetic prompt, has no application
+fallback profile source, and accepts LLM profiles only at individual bindings
+or through the run-wide CLI override. PromptKit v0.5.0 is source-compatible
+with the current tree; a temporary v0.5.0 module override has already passed
+`go test ./...`.
+
+The implementation must nevertheless treat the upstream optional-parameter
+change as intentional: unset `temperature`, `max_tokens`, and `top_p` remain
+unset and are omitted from compatible provider requests. Do not restore the old
+implicit `top_p: 1` default.
+
+## Stage 1: Upgrade The PromptKit Dependency
+
+### Goal
+
+Establish a clean PromptKit v0.5.0 baseline before adopting its new APIs.
+
+### Work
+
+- Update `go.mod` and `go.sum` from PromptKit v0.3.0 to v0.5.0 and run
+  `go mod tidy`.
+- Change the PromptKit built-in profile-catalog marker in
+  `internal/framework/llm/promptkit_profile_fingerprint.go` to identify
+  v0.5.0. This deliberately invalidates LLM checkpoints tied to the prior
+  catalog identity.
+- Review PromptKit-facing compile errors or test failures against the v0.4.0
+  and v0.5.0 release guides. Do not adopt prepared execution, inspection, or
+  fallback profiles in this stage.
+- Replace the existing test assertion for one exact built-in fingerprint hash
+  with durable assertions that the fingerprint is deterministic, non-empty,
+  non-secret, and changes when a semantic profile source changes. Do not add a
+  new version-constant or exact-hash change detector.
+- Update `docs/integrations/pkg-promptkit.md` to pin and link v0.5.0 and state
+  the implemented dependency-level behavior: unset optional sampling controls
+  are provider defaults. Do not document later stages as implemented.
+- Update any other canonical text that explicitly claims the dependency is
+  v0.3.0, but defer descriptions of unimplemented v0.5 APIs.
+
+### Tests And Validation
+
+- `go test ./internal/framework/llm ./internal/cli`
+- `go test ./...`
+- `go vet ./...`
+- `go build ./cmd/notarius`
+- `rg -n 'promptkit v0\.3\.0|promptkit@v0\.3\.0|PromptKit v0\.3\.0' .`
+- `git diff --check`
+
+### Completion Criteria
+
+- The repository directly pins v0.5.0 and all default offline checks pass.
+- The profile-source fingerprint identifies the new upstream catalog without a
+  brittle literal-hash test.
+- Current documentation no longer identifies v0.3.0 as the supported version.
+
+## Stage 2: Execute One Frozen Prepared Snapshot
+
+### Goal
+
+Make Notarius debug details and generation use one exact PromptKit preparation.
+
+### Work
+
+- Refactor `PromptKitClient.CompleteStructured` to call
+  `PrepareExecution`, immediately defer `Discard`, obtain a caller-owned
+  `Details` value, and execute with `RunPrepared`.
+- Preserve the existing Notarius request mapping, cancellation precedence,
+  validation classification, raw structured bytes, response decoding,
+  profile recording, usage reporting, and credential redaction.
+- Ensure every preparation, execution, validation, empty-result, and decode
+  error retains useful Notarius prompt context without exposing prepared handle
+  state or secrets.
+- Use `errors.As` to obtain `*promptkit.CapacityError` on admission rejection.
+  Preserve `contracts.ErrLLMCapacityExceeded` as the stable classification and
+  add a nonblank backend ID only to safe application-owned diagnostic context.
+  Do not expose `promptkit.CapacityError` outside the LLM adapter.
+- Update `docs/internal/llm.md` and the implemented-mechanics portion of
+  `docs/integrations/pkg-promptkit.md` to describe the single frozen execution
+  snapshot and structured capacity adaptation.
+
+### Tests And Validation
+
+- Adapt existing PromptKit client tests to the prepared-execution path.
+- Retain or add one behavioral test proving that the debug prompt details match
+  the request actually passed to generation when a backing prompt source could
+  otherwise change between independent preparations. Test the resulting
+  snapshot consistency, not a private helper call count.
+- Retain capacity tests proving `errors.Is` reaches
+  `contracts.ErrLLMCapacityExceeded`, the selected backend can appear in safe
+  diagnostic context, and provider calls are not made after rejected
+  admission.
+- Run `go test ./internal/framework/llm` and
+  `go test -race ./internal/framework/llm`.
+- Run `go test ./...` and `git diff --check`.
+
+### Completion Criteria
+
+- `CompleteStructured` no longer calls independent `Prepare` and `Run`
+  operations for one request.
+- Debug prompt material and generation result originate from the same frozen
+  PromptKit snapshot.
+- Capacity remains a provider-neutral Notarius error classification.
+
+## Stage 3: Replace Synthetic Profile Validation With Inspection
+
+### Goal
+
+Validate profiles through PromptKit's exact profile-inspection boundary and
+centralize engine profile-source construction.
+
+### Work
+
+- Introduce a small provider-adapter-owned profile inspection or validation
+  function in `internal/framework/llm`. Its public internal signature must use
+  Notarius-owned configuration and result/error types rather than returning
+  PromptKit types to the CLI.
+- Share the code that applies `profile_dir`, `profile_file`, and registered
+  backend options between the production PromptKit engine and the inspection
+  engine. Preserve the mutual-exclusion and local-backend rules.
+- Change CLI explicit-profile preflight to use `Engine.InspectProfile` through
+  that LLM boundary.
+- Remove `profileCheckPromptID`, `profileCheckPromptFS`, the `testing/fstest`
+  production dependency, and the synthetic `Prepare` request.
+- Preserve distinct, useful errors for an absent profile, invalid profile,
+  unknown backend registration, cancellation, and invalid profile source.
+- Do not require `api_key_env` to be populated during configuration validation.
+  Inspection may report credential requirements internally, but actual
+  preparation remains responsible for credential availability before a model
+  call.
+- Update current-behavior sections in `docs/internal/cli.md` and
+  `docs/internal/llm.md`. Keep field definitions in `docs/config.md`.
+
+### Tests And Validation
+
+- Replace synthetic-prompt tests with profile inspection tests covering:
+  configured local backend success; missing local backend failure; absent
+  profile; malformed profile; and an otherwise valid profile whose credential
+  environment variable is intentionally unset.
+- Prove validation performs no provider HTTP call and remains offline.
+- Run `go test ./internal/framework/llm ./internal/cli` and `go test ./...`.
+- Run `git diff --check`.
+
+### Completion Criteria
+
+- No production synthetic profile-check prompt remains.
+- Profile validation uses the same ordinary profile source and backend
+  registrations as execution.
+- Configuration validation succeeds for structurally valid profiles without
+  reading credential values.
+
+## Stage 4: Add Application Fallback Profile Asset Plumbing
+
+### Goal
+
+Allow module families to register application-owned fallback profile YAML
+without placing domain policy in generic LLM code.
+
+### Work
+
+- Extend `internal/framework/llm.AssetRegistry` with a separate fallback
+  profile source collection, registration method, flattened filesystem, and
+  safe content digest.
+- Reuse the existing asset-source path validation and flattening behavior where
+  appropriate. Reject invalid roots, unreadable assets, and duplicate flattened
+  paths. Do not parse PromptKit profile YAML in Notarius.
+- Add `promptkit.WithFallbackProfileFS` to production engine options only when
+  at least one fallback profile source is registered.
+- Supply the identical assembled fallback source to the profile-inspection
+  engine. Adjust CLI composition so pipeline-aware profile validation can use
+  the production LLM asset registry without exposing PromptKit types.
+- Extend profile-source checkpoint identity to include the exact fallback
+  profile asset digest in addition to the PromptKit catalog marker and operator
+  source. Keep the resulting fingerprint hash-only and path/content/credential
+  free.
+- Keep operator source precedence owned by PromptKit. Do not implement profile
+  merging or duplicate PromptKit source resolution in Notarius.
+- Update `docs/internal/llm.md` only for the new implemented generic asset and
+  fingerprint mechanics. No domain fallback exists until Stage 5.
+
+### Tests And Validation
+
+- Add focused AssetRegistry tests for successful flattening, invalid roots,
+  duplicate paths, and hash changes when fallback bytes change.
+- Add adapter-level tests showing that the fallback filesystem reaches both
+  execution construction and inspection construction.
+- Extend checkpoint tests to prove fallback content changes profile-source
+  identity without exposing raw YAML or paths. Use relational comparisons, not
+  a fixed hash literal.
+- Run `go test ./internal/framework/llm ./internal/cli` and `go test ./...`.
+- Run `git diff --check`.
+
+### Completion Criteria
+
+- Generic plumbing can carry application fallback profiles while remaining
+  unaware of D&D IDs or model settings.
+- Inspection, execution, and checkpoint identity use the same fallback asset
+  source.
+
+## Stage 5: Adopt The D&D `dnd-extraction` Fallback
+
+### Goal
+
+Give the D&D module family one stable embedded workload profile that operators
+can replace.
+
+### Work
+
+- Add a D&D-owned embedded PromptKit profile asset with ID `dnd-extraction`
+  under `internal/modules/dnd`. Use the exact baseline defined in
+  `promptkit.md`: OpenRouter, `openai/gpt-5.6-luna`, no explicit reasoning
+  effort, a 240-second timeout, flex service tier, and no selected temperature,
+  token limit, or `top_p`. The omitted reasoning value intentionally allows
+  OpenAI's backend to apply its `medium` default.
+- Register the profile filesystem from the D&D registrar through the generic
+  fallback profile asset boundary. Keep D&D policy out of
+  `internal/framework/llm` and the CLI composition root.
+- Change every maintained D&D LLM prompt definition—including scene chunking,
+  all D&D extractors, and NPC normalization—from the model-named default to
+  `default_profile: dnd-extraction`.
+- Add an integration-level profile-resolution test proving that:
+  - the fallback resolves when no operator source defines the ID;
+  - a valid operator profile with the same ID wins completely; and
+  - an invalid matching operator profile fails rather than falling through.
+- Test through Notarius's assembled production assets and PromptKit boundary;
+  do not duplicate every upstream source-precedence case.
+- Update the implemented profile ownership and prompt-default behavior in
+  `docs/internal/dnd.md`, `docs/internal/llm.md`, and
+  `docs/integrations/pkg-promptkit.md`. Defer the complete operator walkthrough
+  and examples to Stage 10.
+
+### Tests And Validation
+
+- Run focused D&D prompt preparation tests and the production composition
+  tests.
+- Run `go test ./internal/modules/dnd/... ./internal/framework/llm
+  ./internal/cli`.
+- Run `go test ./...`.
+- Verify `rg -n 'default_profile: gemini-2-flash' internal/modules/dnd`
+  returns no matches.
+- Run `git diff --check`.
+
+### Completion Criteria
+
+- All maintained D&D prompts use the application-owned logical profile ID.
+- The fallback works without an operator profile and remains authoritatively
+  overridable by a matching valid operator definition.
+
+## Stage 6: Introduce Module Execution-Class Metadata
+
+### Goal
+
+Make each production module's ability to use an LLM statically discoverable
+without yet changing profile inheritance.
+
+### Work
+
+- Add `ExecutionClass contracts.ExecutionClass` to `pipeline.ModuleSpec` and
+  preserve it through normalization, cloning, catalogs, registries, JSON/debug
+  views, and lookup helpers.
+- In this transitional stage only, allow an omitted execution class to
+  normalize to deterministic so existing test-only fixtures can be migrated in
+  Stage 7 without breaking the repository midway.
+- Explicitly classify every production module:
+  - D&D scene chunking, every D&D extractor, and D&D NPC normalization as
+    `llm_backed`;
+  - all other current production input, chunk, merge, normalize, and output
+    modules as `deterministic`.
+- Update production module specification tests and production catalog tests to
+  assert the semantic class alongside stage, artifact kind, and capabilities.
+- Add catalog lookup support needed by later resolution to retrieve a selected
+  module's execution class by stage and key without constructing it.
+- Do not implement pipeline-level profile inheritance or reject deterministic
+  profiles yet.
+- Update `docs/internal/modules.md` and `docs/internal/dnd.md` to identify
+  execution class as registered module metadata, while noting only implemented
+  uses.
+
+### Tests And Validation
+
+- Run module registration/spec tests across generic, Seriatim, and D&D
+  families.
+- Run `go test ./internal/framework/pipeline ./internal/modules/...`.
+- Run `go test ./...` and `git diff --check`.
+
+### Completion Criteria
+
+- Every production module has an explicit correct execution class.
+- Catalog consumers can retrieve that class without a concrete module
+  instance.
+- Test-only omitted classes remain the only temporary compatibility behavior.
+
+## Stage 7: Enforce Execution Metadata And Remove Runtime Probing
+
+### Goal
+
+Finish the execution-class contract so missing metadata cannot cause future
+profile drift.
+
+### Work
+
+- Update every framework, CLI, and integration test module specification to
+  declare an explicit execution class appropriate to the fake behavior.
+- Change module-spec validation so an empty or unsupported execution class is a
+  registration error. Remove the transitional deterministic default from
+  Stage 6.
+- Replace the chunk runner's special `ChunkExecutionClassProvider` probe with
+  specification-derived behavior. Remove the now-redundant provider interface,
+  implementation methods, and tests when they have no remaining consumer.
+- Ensure chunk producer provenance remains unchanged: it records a non-empty
+  effective binding profile for an LLM-backed chunker, while a deterministic
+  chunker records no profile. A profile selected only through the prompt
+  default remains represented by PromptKit's actual-profile manifest rather
+  than being invented as an explicit chunk binding.
+- Review helper constructors and fixtures for opportunities to set execution
+  class once without obscuring the class under test. Do not introduce an
+  elaborate test-spec framework.
+- Update internal documentation if the removal changes any described runtime
+  mechanics.
+
+### Tests And Validation
+
+- Add or retain focused registration tests for missing and invalid execution
+  classes.
+- Retain chunk-plan provenance tests for LLM-backed and deterministic
+  chunkers.
+- Run `go test ./internal/framework/pipeline ./internal/modules/...`.
+- Run `go test ./...`, `go vet ./...`, and `git diff --check`.
+
+### Completion Criteria
+
+- No registered module specification relies on an implicit execution class.
+- Pipeline metadata, not a concrete runtime type assertion, owns module
+  execution classification.
+
+## Stage 8: Resolve Programmatic Pipeline Profile Defaults
+
+### Goal
+
+Implement profile inheritance and precedence inside the pipeline resolver
+before exposing the field through YAML configuration.
+
+### Work
+
+- Add an optional trimmed `LLMProfile` field to
+  `pipeline.PipelineProfile`. Add a non-empty runtime override field to
+  `pipeline.ResolveOptions` so all precedence decisions occur in the resolver
+  rather than through pre-resolution mutation.
+- After module selection, `--only` filtering, default validator-chain
+  selection, and validator compatibility resolution, apply effective profiles
+  to every selected input, chunk, extract, merge, normalize, output, and
+  validator binding according to the precedence in `promptkit.md`.
+- Apply profiles only when the selected module or validator execution class is
+  `llm_backed`.
+- Reject a binding-specific `llm_profile` on any deterministic module or
+  validator. Do not reject or inspect an unused pipeline default when no
+  selected LLM-backed binding consumes it.
+- Leave an LLM-backed binding empty when no CLI, binding, or pipeline profile is
+  selected so PromptKit can use the prompt's `default_profile`.
+- Store the effective values on resolved bindings before digest construction.
+  Do not add a second inheritance decision to execution.
+- Ensure semantically equivalent repeated binding profiles and one inherited
+  default produce the same resolved pipeline digest. Ensure any changed
+  effective profile changes the digest.
+- Do not modify file configuration or CLI parsing in this stage.
+
+### Tests And Validation
+
+- Add pipeline package tests for the complete precedence matrix:
+  runtime override; binding-specific exception; pipeline default; prompt
+  fallback; and deterministic bindings.
+- Cover default and explicitly configured validator chains, all relevant stage
+  categories, `--only` lane selection, unused defaults, deterministic-profile
+  rejection, and semantic digest equivalence.
+- Prefer table-driven package-level tests over assertions on private traversal
+  helpers.
+- Run `go test ./internal/framework/pipeline` and `go test ./...`.
+- Run `git diff --check`.
+
+### Completion Criteria
+
+- Programmatic pipelines resolve one canonical effective profile policy.
+- Only LLM-backed resolved bindings can contain a profile.
+- Runtime override, binding, pipeline, and prompt precedence is unambiguous and
+  digest-stable.
+
+## Stage 9: Expose Pipeline Defaults Through Configuration And CLI
+
+### Goal
+
+Make the profile-default workflow available to operators while preserving
+validation and override behavior.
+
+### Work
+
+- Add optional `pipelines.<id>.llm_profile` support to the version 4 file
+  configuration model. Use presence-aware decoding so an explicitly set blank
+  value is rejected, while omission remains valid.
+- Preserve the field through file application, configuration cloning,
+  effective configuration, and programmatic profile copies without aliasing or
+  trimming drift.
+- Remove `applyLLMProfileOverride`. Pass the CLI override through the resolver's
+  runtime-override input so deterministic bindings are never populated.
+- Update effective profile-ID collection to cover every selected LLM-backed
+  module stage and LLM-backed validator, including future LLM-backed input and
+  output modules. Do not inspect deterministic or unselected profiles.
+- Ensure `run`, `config validate --pipeline`, resume/checkpoint identity, and
+  relevant dry preflight paths all use the same resolved effective profiles.
+- Preserve `--llm-profile` as the highest-precedence non-empty run-wide
+  override and preserve binding-specific profiles as exceptions when no CLI
+  override is present.
+- Do not increment the configuration version.
+- Update current configuration and CLI contracts in `docs/config.md` and
+  `docs/cli.md` in the same stage. Link to operations for the deployment
+  workflow rather than duplicating it prematurely.
+
+### Tests And Validation
+
+- Add file-config tests for omission, trimming, explicit blank rejection,
+  unknown-key behavior, cloning, and round-trip application.
+- Add effective-config and CLI contract tests for precedence, LLM-only
+  application, inherited-profile inspection failure before factory execution,
+  `--only`, and digest changes.
+- Retain offline operation and do not require credentials for
+  `config validate --pipeline`.
+- Run `go test ./internal/core/config ./internal/framework/pipeline
+  ./internal/cli`.
+- Run `go test ./...`, `go vet ./...`, and `git diff --check`.
+
+### Completion Criteria
+
+- Operators can select `dnd-extraction` once per pipeline.
+- Configuration and CLI paths share the resolver's precedence policy.
+- Unknown effective profiles fail preflight, while deterministic and unused
+  profiles do not cause spurious inspection.
+
+## Stage 10: Complete Operator Documentation, Examples, And Decision Record
+
+### Goal
+
+Make the implemented workflow understandable, copyable, and maintainable
+without duplicating canonical facts.
+
+### Work
+
+- Create an ADR using the next sequential number for the durable decision to
+  use workload-oriented pipeline defaults with operator-overridable application
+  fallback profiles. Record context, decision, alternatives, and consequences;
+  do not turn the ADR into a field reference or implementation log.
+- Complete `docs/config.md` as the canonical owner of profile-source fields,
+  `pipelines.<id>.llm_profile`, validation, and precedence.
+- Complete `docs/operations.md` with an operator workflow that distinguishes
+  Notarius embedded prompts, Notarius fallback profiles, PromptKit built-ins,
+  and deployment filesystem profiles. Include production/development/local use
+  of the same `dnd-extraction` ID, credential handling, absolute-path guidance,
+  and the fact that current relative profile paths use the process working
+  directory rather than the configuration file's directory.
+- Complete `docs/integrations/pkg-promptkit.md` with the v0.5.0 boundary,
+  prepared execution, inspection, fallback and ordinary source precedence,
+  optional provider controls, capacity adaptation, and compatibility policy.
+- Update `docs/internal/configuration.md`, `docs/internal/pipeline.md`,
+  `docs/internal/cli.md`, `docs/internal/llm.md`, `docs/internal/modules.md`, and
+  `docs/internal/dnd.md` only for their owned implementation details. Link to
+  canonical configuration, operations, and upstream format contracts rather
+  than restating them.
+- Keep exactly the existing two D&D configuration examples. Add
+  `llm_profile: dnd-extraction` to the minimal and complete pipelines and remove
+  the now-redundant model-named binding override from the complete example.
+- Add one secret-free maintained operator profile at
+  `examples/profiles/dnd-extraction.yml`. It should be a complete valid profile
+  for the same logical ID and may mirror the embedded baseline; its purpose is
+  to demonstrate file ownership and format, not claim automatic environment
+  detection. Link it from the configuration and operations documentation.
+- If the complete example selects the external profile file, use a path that
+  is valid for the documented repository-root invocation and explicitly note
+  the working-directory rule. Keep the minimal example dependent only on the
+  embedded fallback.
+- Add or extend maintained-example validation so both configuration examples
+  and the profile YAML are checked without generation or credentials.
+- Remove the now-implemented `Pipeline-Level LLM Profile Defaults` section from
+  `docs/roadmap/future.md`. Preserve the unrelated deterministic session and
+  concurrency items.
+- Do not delete `promptkit.md` or this implementation plan during the feature
+  implementation; retire them only after post-implementation review.
+
+### Tests And Validation
+
+- Run maintained example/configuration tests and relevant CLI help/parser
+  tests.
+- Run `go test ./...`.
+- Run `rg -n 'gemini-2-flash' examples docs` and review every remaining match
+  for intentional model-policy or historical context.
+- Run `rg -n 'v0\.3\.0|profileCheckPrompt|applyLLMProfileOverride' .` and resolve
+  stale production or current-documentation matches.
+- Verify all new links and `git diff --check`.
+
+### Completion Criteria
+
+- Every current fact has one canonical documentation owner.
+- Operators can distinguish and deploy all profile layers without reading Go
+  source.
+- Both maintained configurations and the maintained external profile are valid,
+  secret-free, and tested offline.
+- Implemented profile work no longer remains in `future.md`.
+
+## Stage 11: Final Verification And Quality Review
+
+### Goal
+
+Verify the complete migration as one integrated change and correct only defects
+or omissions found during that review.
+
+### Work
+
+- Review the final diff against every acceptance criterion in `promptkit.md`.
+- Confirm provider-specific PromptKit types remain inside the LLM integration
+  boundary and D&D policy remains inside the D&D module family.
+- Confirm execution and inspection receive identical ordinary, fallback, and
+  backend configuration.
+- Confirm no paths, profile YAML, endpoints, credentials, or prepared handle
+  state leak into fingerprints or ordinary diagnostics.
+- Confirm all production module specs have explicit correct execution classes
+  and every resolved deterministic binding is profile-free.
+- Confirm prompt default, pipeline default, binding override, and CLI override
+  behavior through representative assembled configurations.
+- Review tests for redundancy and remove obsolete synthetic-prompt,
+  runtime-probe, exact-hash, or duplicated upstream-behavior tests superseded by
+  stronger contract tests.
+- Perform an optional manual D&D quality comparison if credentials and an
+  evaluation transcript are deliberately supplied. Record no private input or
+  credential material, and do not make this comparison a completion gate.
+
+### Validation Commands
+
+```sh
+gofmt -w <changed-go-files>
+go test ./...
+go test -race ./internal/framework/llm ./internal/core/config ./internal/framework/pipeline ./internal/cli
+go vet ./...
+go build ./cmd/notarius
+git diff --check
+```
+
+Also run focused stale-contract searches:
+
+```sh
+rg -n 'gitea.maximumdirect.net/eric/promptkit v0\.3\.0|PromptKit v0\.3\.0' .
+rg -n 'default_profile: gemini-2-flash|profileCheckPrompt|applyLLMProfileOverride' internal docs examples
+```
+
+Review any matches rather than deleting intentional historical references
+blindly.
+
+### Completion Criteria
+
+- All automated checks pass offline and without real credentials.
+- The implemented behavior matches `promptkit.md` with no known architecture,
+  provenance, checkpoint, profile-precedence, or documentation gap.
+- Any optional live evaluation is clearly separate from correctness testing.
+
+## Open Questions
+
+None. The roadmap decisions are sufficient to implement every stage without an
+additional product or architecture choice.
diff --git a/docs/roadmap/promptkit.md b/docs/roadmap/promptkit.md
new file mode 100644
index 0000000..55ed4f6
--- /dev/null
+++ b/docs/roadmap/promptkit.md
@@ -0,0 +1,318 @@
+# PromptKit v0.5 Integration And LLM Profile Policy
+
+## Purpose
+
+This roadmap defines the target state for upgrading Notarius from PromptKit
+v0.3.0 to v0.5.0 and adopting the upstream runtime and profile facilities that
+directly improve Notarius. It also defines the application policy for stable,
+domain-oriented LLM profile names, operator overrides, pipeline inheritance,
+profile validation, provider defaults, checkpoint identity, and documentation.
+
+The ordered work needed to reach this state belongs in
+[the implementation plan](implementation.md). Current behavior remains defined
+by the canonical documentation outside `docs/roadmap/` until the corresponding
+work is implemented.
+
+## Background
+
+Notarius currently pins PromptKit v0.3.0. Its adapter prepares a request once
+for debug material and then independently runs the original request, causing
+PromptKit to prepare the same logical call a second time. The CLI validates an
+explicit profile by preparing a synthetic prompt. PromptKit profile selection
+can be repeated on individual module bindings or replaced for one invocation
+with `--llm-profile`, but a configured pipeline cannot yet declare one inherited
+profile policy.
+
+PromptKit v0.4.0 and v0.5.0 add the upstream boundaries needed to improve these
+areas:
+
+- [v0.4.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.5.0/docs/releases/v0.4.0.md)
+  adds opaque prepared executions, exact profile and prompt inspection, and a
+  typed backend-capacity error;
+- [v0.5.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.5.0/docs/releases/v0.5.0.md)
+  adds application fallback profile filesystems and stops sending unset
+  optional sampling controls as framework-selected provider values; and
+- the [v0.5.0 format contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.5.0/docs/formats.md)
+  defines the resulting profile-source and execution-setting precedence.
+
+A source-compatibility test of the current Notarius repository against
+PromptKit v0.5.0 completed successfully. The work is therefore primarily an
+intentional runtime and configuration migration rather than a repair for a
+breaking Go API change.
+
+## Goals
+
+- Pin and document PromptKit v0.5.0 as Notarius's supported upstream contract.
+- Execute the exact prepared request snapshot whose safe details are recorded
+  in Notarius debug material.
+- Validate configured PromptKit profiles through the upstream inspection API
+  without synthetic prompts, provider calls, or credential-value access.
+- Give Notarius an application-owned, operator-overridable
+  `dnd-extraction` profile fallback.
+- Let a pipeline choose one default LLM profile without repeating that ID on
+  every LLM-backed binding.
+- Apply profile inheritance and run-wide overrides only where the resolved
+  module or validator can use an LLM.
+- Preserve accurate checkpoint invalidation, effective profile provenance,
+  redaction, cancellation, concurrency, and provider-neutral module contracts.
+- Provide operators with one clear deployment pattern for production,
+  development, and local profile definitions.
+
+## Target End State
+
+### PromptKit Runtime Boundary
+
+Notarius depends on PromptKit v0.5.0 and uses its public APIs rather than
+reimplementing source or execution resolution.
+
+For each structured completion, the adapter:
+
+1. builds one PromptKit run request from the provider-neutral Notarius request;
+2. calls `PrepareExecution` once;
+3. immediately arranges an idempotent `Discard` for every unexecuted handle;
+4. obtains credential-redacted `Details` for debug and response metadata; and
+5. calls `RunPrepared` so generation uses that exact frozen snapshot.
+
+The debug prompt and successful result therefore describe the same selected
+profile, rendered messages, input bytes, session, output contract, and effective
+settings even when a filesystem-backed source changes concurrently. PromptKit
+handle types remain private to `internal/framework/llm`.
+
+PromptKit admission failures continue to match Notarius's provider-neutral
+`ErrLLMCapacityExceeded` contract. When PromptKit supplies a `CapacityError`,
+the adapter obtains the normalized backend ID through `errors.As` and may add it
+to safe application-owned diagnostics without parsing upstream error wording.
+The backend ID does not become a provider-specific module contract.
+
+### Optional Provider Controls
+
+Notarius accepts PromptKit v0.5.0's new behavior for `temperature`,
+`max_tokens`, and `top_p`: an unset setting is omitted from compatible provider
+requests and the provider chooses its own default. Notarius does not restore
+PromptKit's former implicit `top_p: 1` value globally.
+
+An operator who requires a particular value specifies it in the selected
+PromptKit profile. The application fallback described below intentionally
+leaves these controls unset. A human-reviewed D&D extraction comparison should
+be performed after the upgrade, but paid or nondeterministic model output is
+not part of the default automated test suite.
+
+### Profile Inspection
+
+Pipeline-aware configuration validation uses `Engine.InspectProfile` for every
+effective explicit profile ID. It verifies that the profile exists, parses and
+validates, resolves its backend and target, and is compatible with the engine's
+registered backends. It does not create a synthetic prompt, load prompt inputs,
+contact a provider, or require credential values to exist in the validation
+process environment.
+
+Credential availability is execution-time state. PromptKit preparation still
+enforces the selected profile's credential contract before generation. This
+keeps `notarius config validate` useful in build and deployment validation
+environments where secrets are deliberately absent.
+
+PromptKit construction for inspection and execution uses one shared internal
+profile-source and backend-option path. The CLI does not expose PromptKit public
+types across the Notarius LLM boundary merely to perform inspection.
+
+`InspectPrompt` is not adopted merely because it exists. It remains available
+for a later, separately defined module-to-prompt interface preflight if a
+concrete validation requirement justifies that additional contract.
+
+### Application And Operator Profile Sources
+
+Notarius embeds one ordinary PromptKit YAML profile with the stable ID
+`dnd-extraction`. It is an application fallback registered through
+`WithFallbackProfileFS`, is owned by the D&D module family, and initially
+preserves the current effective D&D baseline:
+
+- backend: PromptKit's built-in `openrouter` backend;
+- model: `openai/gpt-5.6-luna`;
+- reasoning effort: unset, allowing OpenAI's backend to apply its default of
+  `medium`;
+- generation timeout: 240 seconds;
+- service tier: `flex`; and
+- no application-selected `temperature`, `max_tokens`, or `top_p`.
+
+All maintained D&D LLM prompt definitions use `dnd-extraction` as their
+`default_profile`. The ID communicates workload intent rather than a provider,
+model, or environment. Changing the embedded fallback is an intentional
+Notarius execution-policy change and participates in checkpoint identity.
+
+Effective profile definitions resolve in PromptKit's order:
+
+1. programmatic in-memory profiles used by tests or explicit consumers;
+2. the operator source configured by `promptkit.profile_file` or
+   `promptkit.profile_dir`;
+3. the Notarius application fallback source; and
+4. PromptKit's embedded built-in catalog.
+
+Only an absent ID falls through to the next source. A matching profile is a
+complete definition: fields are not merged with a lower-precedence definition,
+and a malformed matching operator profile fails rather than silently selecting
+the application fallback.
+
+Production, development, and local deployments should normally provide
+different complete definitions for the same `dnd-extraction` ID. An operator
+source is optional because the application fallback keeps the maintained D&D
+workflow usable, but a deployment that needs an intentional model or backend
+policy should configure its own definition.
+
+### Domain Ownership And Asset Assembly
+
+The D&D fallback profile remains under `internal/modules/dnd` and is registered
+by the D&D registrar, consistent with ADR-0004. Generic LLM plumbing knows how
+to collect and flatten application fallback profile filesystems but contains no
+D&D model or policy knowledge.
+
+The shared asset registry detects invalid roots, unreadable sources, and
+duplicate flattened paths. PromptKit remains responsible for strict profile
+YAML parsing, duplicate profile-ID detection, source precedence, and effective
+target resolution. The same assembled fallback source is supplied to runtime
+execution and CLI profile inspection.
+
+### Explicit Module Execution Metadata
+
+Every registered input, chunk, extract, merge, normalize, and output module
+declares one required execution class: `deterministic` or `llm_backed`.
+Validator registrations continue to declare the same distinction through their
+validator specifications.
+
+The registered specification is authoritative for configuration resolution.
+Current production classifications are:
+
+- the D&D scene chunker, all D&D extractors, and the D&D NPC normalizer are
+  LLM-backed;
+- the Seriatim input adapter, generic chunker, all current mergers, all other
+  current normalizers, and the JSON output encoder are deterministic; and
+- current validators retain their declared classifications.
+
+Missing or unsupported execution metadata is a registration error. Explicitly
+assigning `llm_profile` to a deterministic module or validator is a pipeline
+resolution error. The framework does not infer execution class by inspecting
+domain package names or concrete implementation types at runtime.
+
+The module specification replaces the chunk runner's special runtime
+execution-class probe. Effective resolved bindings already express the result:
+only LLM-backed bindings may retain a non-empty profile.
+
+### Pipeline-Level Profile Default
+
+Configuration version 4 gains one optional non-empty pipeline field:
+
+```yaml
+pipelines:
+  dnd-session:
+    llm_profile: dnd-extraction
+```
+
+No configuration-version increment is required because the field is additive
+and existing files remain valid. An explicitly present blank value is invalid.
+
+For every selected LLM-backed module and validator, the effective profile uses
+this precedence:
+
+1. non-empty run-wide `--llm-profile` override;
+2. binding-specific `llm_profile`;
+3. pipeline-level `llm_profile`; and
+4. the prompt definition's `default_profile`, represented by an empty effective
+   Notarius binding profile.
+
+The run-wide override and inherited pipeline default never attach to a
+deterministic binding. Binding-specific exceptions remain available when one
+operation needs a different cost, latency, quality, backend, or reasoning
+policy.
+
+Inheritance is resolved after module and validator selection, including
+`--only` lane filtering, but before effective-pipeline validation, digest
+construction, explicit-profile inspection, checkpoint construction,
+preparation, execution, or provenance capture. Only profiles used by selected
+LLM-backed bindings are inspected. An unused pipeline default in a pipeline
+with no selected LLM-backed work does not require an otherwise unused profile
+to exist.
+
+The resolved pipeline contains effective binding profiles rather than a second
+runtime inheritance mechanism. Two pipelines that differ only by spelling the
+same effective policy once as a pipeline default and once on every LLM-backed
+binding have the same semantic resolved digest. Changing an effective profile
+changes the digest and applicable checkpoint identity.
+
+### Provenance And Checkpoints
+
+The PromptKit profile-source checkpoint fingerprint covers:
+
+- the PromptKit v0.5.0 built-in profile catalog identity;
+- exact application fallback profile asset content; and
+- exact configured operator profile YAML content, when present.
+
+The existing local-backend target fingerprint remains separate and continues
+to exclude scheduling-only concurrency limits. Fingerprints contain hashes and
+stable markers, not profile contents, filesystem paths, endpoints, credentials,
+or other secrets.
+
+Changing the PromptKit version, application fallback, operator profile, or
+effective pipeline profile makes incompatible LLM checkpoints ineligible for
+reuse. The dependency upgrade is expected to invalidate checkpoints produced
+under v0.3.0.
+
+Successful run manifests continue to record only profiles actually selected by
+PromptKit, including their effective model, backend, and reasoning metadata.
+Debug output reports the same effective execution snapshot used for generation.
+
+### Operator Documentation And Examples
+
+Canonical documentation clearly distinguishes:
+
+- Notarius prompt and schema assets embedded in the application;
+- Notarius application fallback profiles embedded in the application;
+- PromptKit's own embedded built-in profiles; and
+- operator profile files on the deployment filesystem.
+
+The configuration reference owns the pipeline field, profile-source fields,
+validation rules, and precedence. Operations owns deployment layout, working
+directory behavior, credentials, and environment-specific profile management.
+The PromptKit integration document owns the pinned upstream contract and
+source-precedence boundary. Internal documents describe asset registration,
+resolution, inspection, prepared execution, fingerprinting, and tests without
+duplicating user-facing field definitions.
+
+The maintained examples continue to include only the minimal and complete D&D
+configurations. They use the stable `dnd-extraction` policy, and one maintained
+PromptKit profile file under `examples/` demonstrates an operator override.
+Examples remain secret-free and are validated without live provider calls.
+
+## Out Of Scope
+
+- Implementing the separate deterministic prompt-session identity roadmap
+  item.
+- Changing the default `concurrency.total_llm` value; PromptKit's retained
+  OpenRouter capacity of 16 remains relevant to that separate item.
+- Adding model evaluation as a deterministic or CI correctness gate.
+- Automatically selecting production, development, or local environments.
+  Deployment configuration chooses the operator profile source.
+- Profile inheritance, partial profile merging, or cross-profile aliases.
+- Exposing PromptKit types to modules, validators, durable output contracts, or
+  public configuration structures.
+- Adopting `InspectPrompt` without a separately justified prompt-interface
+  validation contract.
+
+## Acceptance Criteria
+
+- Notarius builds and its offline test suite passes with PromptKit v0.5.0.
+- Every structured completion executes the exact snapshot used for safe debug
+  prompt details.
+- Profile preflight uses profile inspection and no synthetic prompt.
+- The embedded `dnd-extraction` fallback resolves without an operator source,
+  and a matching valid operator profile replaces it completely.
+- Every production module has explicit, correct execution metadata.
+- Pipeline, binding, CLI, and prompt-default precedence behaves as defined for
+  modules and validators, while deterministic bindings remain profile-free.
+- Effective profiles participate in pipeline digests, profile inspection,
+  checkpoint identity, debug records, and run provenance at the appropriate
+  boundaries.
+- The dependency and application fallback changes invalidate incompatible old
+  checkpoints without exposing profile or credential content.
+- Canonical documentation and maintained examples accurately describe and
+  exercise the implemented operator workflow.
+- Default tests remain deterministic, offline, credential-free, and focused on
+  Notarius-owned behavior rather than duplicating PromptKit's upstream suite.