Rewrite internal documentation for current stage and state contracts

docs/internal/README.md

@@ -1,29 +1,43 @@
 # Internal Documentation Index
 
 ## Audience
-Developers and LLM coding agents changing Narratio internals.
+Developers and coding agents changing Narratio internals.
 
 ## Scope
-Implementation-accurate contracts for workspace/state, manifests, stages, artifact resolution, adapter boundaries, and restore command behavior.
+`docs/internal/` documents implemented internal contracts: stage boundaries, manifest/state behavior, artifact resolution, restore behavior, storage boundaries, and workspace invariants.
 
-## Component Docs
-- `adapters.md`: external adapter map, runtime wiring, and boundary ownership.
-- `storage.md`: remote storage backend contracts and object-store invariants.
-- `manifest.md`: session/run manifest schemas, lifecycle transitions, and persistence semantics.
-- `artifacts.md`: built-in artifact registry, runtime artifact catalog, and source-resolution behavior.
-- `workspace.md`: local state model, manifests, run-local layout, materialization, and cleanup invariants.
-- `command-restore.md`: restore command discovery/planning/execution/reporting contract.
-- `stage-prepare.md`: input materialization and provenance capture.
-- `stage-transcribe.md`: WhisperX transcript generation.
-- `stage-merge.md`: Seriatim normalization + merge.
-- `stage-polish.md`: Audita transcript polishing.
-- `stage-normalize.md`: post-polish normalization.
-- `stage-trim.md`: bounds-driven transcript trimming.
-- `stage-analyze.md`: dependency-ordered Scriptorium artifact generation for selected configured artifacts.
-- `stage-publish.md`: publish upload and current-pointer commit contract.
+User and operator behavior belongs in:
+- `docs/cli.md`
+- `docs/config.md`
+- `docs/operations.md`
+- `docs/troubleshooting.md`
 
-## External Integration Notes
-- `../integrations/README.md`: canonical location for external integration contracts (`audita.md`, `seriatim.md`, `scriptorium.md`).
+## Pipeline Stage Set
+Canonical stage order from `internal/stage.All()`:
+1. `prepare`
+2. `transcribe`
+3. `merge`
+4. `polish`
+5. `normalize`
+6. `trim`
+7. `analyze`
+8. `publish`
+9. `notify` (placeholder)
 
-## Canonical Owner
-`docs/internal/` is the canonical home for implemented internals per `docs/policy/documentation.md`.
+`notify` is currently a placeholder stage with optional notifier call behavior; it has no persisted pipeline outputs.
+
+## Internal Component Docs
+- `adapters.md`: external adapter boundaries and default runtime wiring.
+- `artifacts.md`: canonical source IDs, runtime catalog behavior, and resolution rules.
+- `manifest.md`: session and run manifest contracts.
+- `storage.md`: object-store interface and S3 implementation behavior.
+- `workspace.md`: local session layout, run-local layout, and cleanup guardrails.
+- `command-restore.md`: restore discovery, planning, execution, and reporting.
+- `stage-prepare.md`
+- `stage-transcribe.md`
+- `stage-merge.md`
+- `stage-polish.md`
+- `stage-normalize.md`
+- `stage-trim.md`
+- `stage-analyze.md`
+- `stage-publish.md`