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notarius/docs/internal/overview.md

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# 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.
## Executable And CLI
`cmd/notarius` calls the CLI package. `internal/cli` owns:
- 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.
The CLI should stay thin around framework contracts. Domain extraction behavior
belongs in modules, not in command handlers.
## 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.
## 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`: Scriptorium-backed structured-output client,
prompt/schema asset registry, scheduler, schema registry, and secret
redaction.
- `internal/framework/validate`: validator decision helpers and cardinality
enforcement.
Framework code should stay source-agnostic and domain-agnostic.
## Module Packages
Production module packages live under `internal/modules`:
- `input/seriatim`
- `chunk/generic`
- `extract/dnd/spells`
- `merge/appendorder`
- `normalize/noop`
- `output/json`
Each module package owns its contract implementation, module spec,
registration, options, focused tests, and module-specific errors.
## Fixtures And Tests
The repository uses focused package tests plus a fixture-driven CLI workflow.
- 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.
Do not use real external services in tests. Use fakes, fixtures, or local test
servers.
## Boundary Reminders
- 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.