Protect transcript refinement resume semantics

docs/internal/manifest.md

@@ -207,6 +207,13 @@ runner marks the aggregate record stale and executes it. Analyze's validator
 can still accept a partial selection when only unrelated artifact records are
 stale.
 
+The current production semantic contracts cover prepare, transcribe, merge,
+polish, normalize, trim, and render. They record resolved choices Narratio can
+observe, not operational runner tuning. External model, module, prompt,
+profile, and configuration-file contents that a tool privately loads remain
+outside the manifest contract when their configured identifier is unchanged;
+operators must force the affected stage after such a private content change.
+
 Session manifest is the authoritative stage-progress ledger across invocations.
 Run manifest is invocation-scoped audit state.