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# Commit Message Format and Templates
> **Agent role**:
Reference this file for commit message formatting and templates.
## Commit Message Format (Normative)
### A. Subject Line (required)
```
<type>(<scope>)<!>: <summary>
```
- **type** (lowercase, Conventional Commits):
`feat|fix|refactor|perf|docs|test|build|chore|ci|revert`
- **scope**: optional module/package/area (e.g., `api`, `ui/login`, `db`)
- **!**: include when a breaking change is introduced
- **summary**: imperative mood, ≤ 72 chars, no trailing period
**Examples**
- `fix(api): handle null token in refresh path`
- `feat(ui/login)!: require OTP after 3 failed attempts`
### B. Body (optional, when it adds non-obvious value)
- One blank line after subject.
- Wrap at ~72 chars.
- Explain **what** and **why**, not line-by-line "how".
- Include brief notes like tests passing or TS/lint issues resolved
**only if material**.
**Body checklist**
- [ ] Problem/symptom being addressed
- [ ] High-level approach or rationale
- [ ] Risks, tradeoffs, or follow-ups (if any)
### C. Footer (optional)
- Issue refs: `Closes #123`, `Refs #456`
- Breaking change (alternative to `!`):
`BREAKING CHANGE: <impact + migration note>`
- Authors: `Co-authored-by: Name <email>`
- Security: `CVE-XXXX-YYYY: <short note>` (if applicable)
## Content Guidance
### Include (when relevant)
- Specific fixes/features delivered
- Symptoms/problems fixed
- Brief note that tests passed or TS/lint errors resolved
### Avoid
- Vague: *improved, enhanced, better*
- Trivialities: tiny docs, one-liners, pure lint cleanups (separate,
focused commits if needed)
- Redundancy: generic blurbs repeated across files
- Multi-purpose dumps: keep commits **narrow and focused**
- Long explanations that good inline code comments already cover
**Guiding Principle:** Let code and inline docs speak. Use commits to
highlight what isn't obvious.
## Copy-Paste Templates
### Minimal (no body)
```text
<type>(<scope>): <summary>
```
### Standard (with body & footer)
```text
<type>(<scope>)<!>: <summary>
<why-this-change?>
<what-it-does?>
<risks-or-follow-ups?>
Closes #<id>
BREAKING CHANGE: <impact + migration>
Co-authored-by: <Name> <email>
```
## Type Descriptions
### feat
New feature for the user
### fix
Bug fix for the user
### docs
Documentation only changes
### style
Changes that do not affect the meaning of the code
### refactor
Code change that neither fixes a bug nor adds a feature
### perf
Code change that improves performance
### test
Adding missing tests or correcting existing tests
### build
Changes that affect the build system or external dependencies
### ci
Changes to CI configuration files and scripts
### chore
Other changes that don't modify src or test files
---
**See also**:
- `.cursor/rules/workflow/version_control.mdc` for
core version control principles
- `.cursor/rules/workflow/version_sync.mdc` for version synchronization details
**Status**: Active commit message guidelines
**Priority**: High
**Estimated Effort**: Ongoing reference
**Dependencies**: version_control.mdc
**Stakeholders**: Development team, AI assistants
## Model Implementation Checklist
### Before Creating Commits
- [ ] **Change Review**: Review all changes to be committed
- [ ] **Scope Assessment**: Determine if changes belong in single or multiple commits
- [ ] **Message Planning**: Plan clear, descriptive commit message
- [ ] **Convention Check**: Review commit message format requirements
### During Commit Creation
- [ ] **Type Selection**: Choose appropriate commit type (feat, fix, docs, etc.)
- [ ] **Message Writing**: Write clear, concise commit message
- [ ] **Body Content**: Add detailed description if needed
- [ ] **Breaking Changes**: Document breaking changes with `!` and migration notes
### After Commit Creation
- [ ] **Message Review**: Verify commit message follows conventions
- [ ] **Change Validation**: Confirm all intended changes are included
- [ ] **Documentation**: Update any related documentation
- [ ] **Team Communication**: Communicate significant changes to team