Unify invocation manifest identity

docs/internal/manifest.md

@@ -92,6 +92,12 @@ runner marks it stale and executes it.
 Session manifest is the authoritative stage-progress ledger across invocations.
 Run manifest is invocation-scoped audit state.
 
+Each invocation derives campaign, session, run, local-path, and remote-prefix
+metadata from the validated resolved configuration as one projection. A persisted
+session manifest must agree on campaign and session identity before execution;
+the current projection is refreshed for every invocation while stage progress,
+inputs, and durable artifacts remain session history.
+
 ## Invariants
 
 - stage resume/skip decisions are session-manifest driven.