Commit Style — Conventional Commits (MANDATORY)

Every commit message MUST follow Conventional Commits:

<type>(<scope>): <description> (#N)

<optional body>

Closes #N

• Allowed types: feat, fix, refactor, docs, test, chore, ci, perf, style, build, revert
• Scope matches the area of the codebase: meta, manifest, catalog, ci, docs, harness — e.g. feat(catalog):, fix(meta):, chore(ci):
• Breaking changes use !: feat(manifest)!: change manifest schema version field
• Include (#N) issue reference in commit subject
• Include Closes #N in commit body
• jj fires no git hooks, so nothing checks the message at commit time — the grammar is enforced by CI (mise run check-commits <range>) and by the reviewer. Write it right the first time
• Do NOT use free-form commit messages like "update code" or "fix stuff" — they will be rejected in CI