diff --git a/AGENTS.md b/AGENTS.md
index b8043302..d4fe159d 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -76,3 +76,8 @@ belongs inside an existing parent:
 - The reconciliation checker (`scripts/gitea_reconciliation_check.py`) must
   stay green after any issue state change; the artifact is updated in the
   same change that moves issues.
+
+## Async continuation final flow proofs (R13/M9) — 2026-09-19
+
+PR-flow live proof marker: harmless documentation addition exercising the
+canonical single-continuation path on the PC-local forge. No code change.