diff --git a/AGENTS.md b/AGENTS.md
index a495bf85..0731ab1d 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -32,6 +32,9 @@ CONTRIBUTING.rst                 # how to contribute (issues, branching, PRs)
 8. **Never commit or push without being asked.**
 9. **Commit message**: follow [Documentation/Advanced/CommitMessages.rst](Documentation/Advanced/CommitMessages.rst).
    This repo has only `main` (no LTS branches), so skip `Releases:`/`Resolves:`.
+10. **Pull request**: the title is the commit's summary line and the
+    description is the commit body, trailers included, as plain wrapped text.
+    Add nothing else: no Markdown lists, no generated-by footer.
 
 ## References
 
diff --git a/CLAUDE.md b/CLAUDE.md
index 51f28f06..bdfc585f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -7,3 +7,5 @@ rules. This file exists only because Claude Code specifically looks for
 One Claude-specific detail: in the commit message trailer format described
 in AGENTS.md, use `Assisted-by: Claude <model name> <noreply@anthropic.com>`
 — the actual model name you're running as, not a guess.
+
+@AGENTS.md