Verify extraction provenance and prune semantic staging before inference

AGENTS.md

@@ -30,6 +30,12 @@ readiness without completed release gates and recorded evidence.
 - Desktop setup must work out of the box: ship the native worker, automatically
   download/verify missing Google assets, reuse cached assets, and expose progress/retry in the UI.
 - Add meaningful tests for retrieval, persistence, and filesystem lifecycle changes.
+- Persist SHA-256 of exact parser input bytes. Same-size/mtime overwrites must
+  be detected on rescans; semantic encoding and agent excerpts must reject
+  missing or stale extraction provenance. Preserve legacy lexical search.
+- Validate sources after ANN preparation, before the publication write
+  transaction. Prune obsolete staging before inference without dropping
+  compatible completed work or modifying the active generation.
 - Keep docs/ROADMAP.md current. Unexecuted platform checks remain unchecked.
 - Gitea Actions are disabled for this repository at Karl's explicit request
   (2026-10-12, repeated failure emails). Do not re-enable without his request.