Resolving W6 earlier today I added the addendum rule straight into
docs/aar/template.md — a framework file pinned byte-identical to the neckbeard
baseline, and pruefe_upstream_drift.py exists precisely to catch that. Its
docstring even cites the question that prompted it: whether agents would rewrite
AGENTS.md. So the check caught exactly the thing it was built for, and the fix is
to put the rule where project-specific rules belong.
Template restored byte-identical; the addendum practice now lives in the project
section of AGENTS.md, with a note saying why it is not in the template.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>