diff --git a/AGENTS.md b/AGENTS.md
index 5e53ec5..ad239fa 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,4 +1,4 @@
-Follow repository instruction files that are present in this checkout; do not assume optional policy docs exist.
+Repository rule source of truth: [docs/ai/repo-rules.md](docs/ai/repo-rules.md). Follow repository instruction files that are present in this checkout; do not assume optional policy docs exist.
 
 Use explicitly configured repository policy docs only when they exist in this checkout.
 
diff --git a/CLAUDE.md b/CLAUDE.md
index 5e53ec5..ad239fa 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -1,4 +1,4 @@
-Follow repository instruction files that are present in this checkout; do not assume optional policy docs exist.
+Repository rule source of truth: [docs/ai/repo-rules.md](docs/ai/repo-rules.md). Follow repository instruction files that are present in this checkout; do not assume optional policy docs exist.
 
 Use explicitly configured repository policy docs only when they exist in this checkout.