Move documentation for external integrations into the docs/integrations subfolder

docs/documentation/policy.md

@@ -283,6 +283,16 @@ Roadmap docs should clearly distinguish:
 
 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.
+
+Use one file per integration where useful.
+
 ## Examples Directory
 
 Projects with non-trivial configuration or workflows should include `examples/`.

docs/integrations/README.md

@@ -0,0 +1,15 @@
+# Integration Documentation Index
+
+## Audience
+Developers and LLM coding agents changing Narratio's external integration contracts.
+
+## Scope
+Implemented-only reference notes for the external systems Narratio currently integrates with.
+
+## Integration Docs
+- `audita.md`: Audita adapter invocation and validation contract.
+- `seriatim.md`: Seriatim normalize/merge/trim adapter contract.
+- `scriptorium.md`: Scriptorium run/render adapter contract.
+
+## Canonical Owner
+`docs/integrations/` is the canonical home for external integration reference notes per `docs/documentation/policy.md`.

docs/internal/README.md

@@ -20,9 +20,9 @@ Implementation-accurate contracts for workspace/state, stages, and external adap
 - `stage-trim.md`: bounds-driven transcript trimming.
 - `stage-analyze.md`: Scriptorium session recap generation.
 - `stage-archive.md`: archive upload and current-pointer publish contract.
-- `integration-audita.md`: Audita adapter invocation/validation contract.
-- `integration-seriatim.md`: Seriatim merge/normalize/trim adapter contract.
-- `integration-scriptorium.md`: Scriptorium run/render adapter contract.
+
+## External Integration Notes
+- `../integrations/README.md`: canonical location for external integration contracts (`audita.md`, `seriatim.md`, `scriptorium.md`).
 
 ## Canonical Owner
 `docs/internal/` is the canonical home for implemented internals per `docs/documentation/policy.md`.