Agent Skills: Conventional Commits

Conventional Commits

Commit git changes using the Conventional Commits v1.0.0 specification.

Commit Message Format

<type>[optional scope]: <description>

[optional body]

[optional footer(s)]

Commit Types

| Type | Description | SemVer | |------|-------------|--------| | feat | New feature | MINOR | | fix | Bug fix | PATCH | | docs | Documentation only | - | | style | Formatting, whitespace (no code change) | - | | refactor | Code restructuring (no feature/fix) | - | | perf | Performance improvement | - | | test | Adding/updating tests | - | | build | Build system or dependencies | - | | ci | CI configuration | - | | chore | Maintenance tasks | - | | revert | Reverting commits | - |

Breaking changes: Add ! after type/scope (e.g., feat!: or feat(api)!:) or include BREAKING CHANGE: footer.

Workflow

1. Analyze workspace state

   git status
   git diff --stat
   git diff --staged --stat
   

2. Review actual changes for each modified file to understand the nature of changes:

   git diff <file>        # unstaged
   git diff --staged <file>  # staged
   

3. Group changes logically

   • Separate commits (default): Each distinct change gets its own commit
   • Combined commits: Only when changes are tightly coupled and make no sense apart

   Examples of separate commits:

   • Adding a feature + updating docs → 2 commits
   • Fixing bug A + fixing bug B → 2 commits
   • Refactoring module X + adding tests → 2 commits

   Examples of combined commits:

   • Feature code + its unit tests (if tests only make sense with the feature)
   • Migration file + model changes (if they're atomic)

4. Determine commit order

   • Infrastructure/build changes first
   • Core functionality before dependent features
   • Tests can go with or after the code they test
   • Documentation typically last

   When order is ambiguous: Ask the user before proceeding.

5. Stage and commit each group

   git add <files>
   git commit -m "<type>[scope]: <description>"
   

Writing Good Commit Messages

Description (first line):

• Use imperative mood: "add feature" not "added feature"
• No period at end
• Under 72 characters
• Be specific: "fix null pointer in user auth" not "fix bug"

Scope (optional):

• Module, component, or area affected
• Examples: feat(auth):, fix(parser):, docs(readme):

Body (when needed):

• Explain what and why, not how
• Wrap at 72 characters
• Separate from description with blank line

Footer (when needed):

• BREAKING CHANGE: <description> for breaking changes
• Refs: #123 for issue references
• Reviewed-by: Name for attribution

Examples

# Simple feature
git add src/auth/oauth.py
git commit -m "feat(auth): add OAuth2 support for Google login"

# Bug fix with scope
git add lib/parser.js
git commit -m "fix(parser): handle empty arrays in JSON input"

# Docs only
git add README.md
git commit -m "docs: add installation instructions for Windows"

# Breaking change
git add api/v2/
git commit -m "feat(api)!: redesign user endpoints for v2

BREAKING CHANGE: /users endpoint now requires authentication.
Old endpoint /users/list is removed, use /users instead."

# Refactor with body
git add src/utils/
git commit -m "refactor(utils): extract date formatting to separate module

Moved date formatting logic from multiple components into
a centralized utils/dates.py module to reduce duplication
and ensure consistent formatting across the application."

Handling Ambiguity

Ask the user when:

• Multiple unrelated changes exist and commit order matters for history
• Changes span features that could be atomic or separate
• It's unclear whether changes are one logical unit or multiple

Example prompt:

I see changes to the auth module and the API routes. Should I:

1. Commit them separately (auth first, then routes)?
2. Commit them together as a single feature?
3. Different order?