## Why
The existing git.md was thin — missing atomicity, working-state, and
trailer guidance that belong in any professional git workflow. No commit
message template existed, making the expected format implicit and
inconsistent across sessions.
## Impact
- git.md is now the canonical reference for commit hygiene rules
- commits.md provides a structured template (Why / Implementation Notes /
Impact / Git Trailers) that agents and humans can follow
- AGENTS.md cross-references commits.md so it is discoverable at session
start
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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