Commit Style — Team Commit Message Conventions

Write commit messages that pass the team's commit-msg hook on the first try and read well in git log years later.

Procedure

1. Read the project's style file first: .claude/idev/commit-style.md. If it exists, its rules override everything below. If it doesn't exist, apply the defaults below (and mention that /idev:hooks install-git-hooks sets up the style file + enforcement hooks).
2. Derive the ticket ID from the branch name when the style requires one: git branch --show-current, extract the first ABC-123-shaped token. The prepare-commit-msg hook does this automatically too — don't add the prefix twice.
3. Write the message:
   • Subject: type(scope): imperative summary — conventional-commit types (feat, fix, docs, refactor, perf, test, build, ci, chore), ≤ 72 chars, no trailing period.
   • Body (for anything non-trivial): the why, not a list of what — the diff already shows what. Wrap at ~72 columns.
   • Trailers last, each on its own line (Co-Authored-By:, Refs:), per the team's policy in the style file.
4. Check before committing: if .git/hooks/commit-msg exists, the message must match its pattern (default: optional ABC-123: ticket prefix + conventional-commit subject). If the hook rejects a commit, fix the message — never bypass with --no-verify unless the user explicitly asks.

Defaults (when no style file exists)

feat(auth): add refresh-token rotation

Sessions died after 15 minutes because the access token was never
refreshed. Rotate the refresh token on each renewal per OWASP.

Refs: ABC-123

Pull request format

When creating a PR (any platform — az repos pr create on Azure DevOps, gh pr create on GitHub), unless .claude/idev/commit-style.md overrides:

• Title: same convention as the commit subject (ticket prefix + typed imperative summary). For a single-commit branch, reuse the subject.
• Description:

## What
2-4 bullets of user-visible change (not a commit list — the platform shows those).

## Why
The problem/ticket context in 1-3 sentences.

## Testing
What was actually run: build, tests, browser-test report path if UI.

## Notes for reviewer
Risky spots, decisions needing eyes, rollback hint. Omit if none.

Anti-patterns

• "fix stuff", "wip", "updates" — the hook rejects these; so should you.
• Restating the diff in the body.
• Bundling unrelated changes to share one message — split the commits.