ci: reject AI co-author trailers in commit history (#394) - #395
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Adds a
commit-hygieneworkflow that fails when any commit in a PR, or pushed tomain, carries an AI co-author trailer (Co-Authored-By: Claudeand friends). It scans trailer lines only, so commit subjects and bodies stay free text.Why: AI co-author trailers reached
mainonce (#337, merge commit path) because the previous safeguard was a manual step tied to squash merges. With this gate the check is enforced for external and own contributions alike.The gate script was verified locally against synthetic commits: fails on an AI trailer, passes clean ranges.
Closes #394