No AI Co-Authors. A Manifesto

A pre-commit hook and GitHub Action that strips AI attribution trailers like Co-Authored-By: Claude Opus 4.8 from commits before they land, matching on normalized display names and emails to avoid false positives on humans named Claude Shannon. The central argument is that AI tool attribution in bylines diffuses accountability without adding provenance signal. Enforces human-only authorship at the git layer, not policy.