commit

name	commit
description	Creates git commits with well-formatted messages. Checks for .gitmessage template in project root and follows its format, otherwise uses conventional commits. Analyzes existing commit history to match tone and style.

Git Commit Skill

This skill creates git commits with properly formatted commit messages that match the project's conventions and style.

When to Use

• When the user asks to commit changes
• When the user says "commit", "コミットして", "変更をコミット", etc.
• After completing a task when the user requests a commit

Workflow

Step 1: Check for .gitmessage Template

First, check if the project has a .gitmessage file:

cat .gitmessage 2>/dev/null || echo "NO_GITMESSAGE_FOUND"

If .gitmessage exists:

• Parse its format, prefixes, and structure
• Follow the template exactly when composing the commit message

If .gitmessage does not exist:

• Use Conventional Commits format (see below)

Step 2: Analyze Current Changes

Run these commands to understand what will be committed:

# Check untracked and modified files (never use -uall flag)
git status

# View staged and unstaged changes
git diff
git diff --cached

Step 3: Analyze Existing Commit Style

Check recent commits to match tone and style:

git log --oneline -10

Pay attention to:

• Prefix usage (feat, fix, refactor, update, etc.)
• Case style (lowercase vs sentence case)
• Message length and detail level
• Language (English vs other)

Step 4: Compose Commit Message

If .gitmessage Template Exists

Follow the template structure exactly. Common template elements include:

• Type prefix (feat, fix, docs, etc.)
• Scope in parentheses (optional)
• Subject line
• Body (optional)
• Footer with issue references (optional)

If No .gitmessage (Conventional Commits)

Use lowercase conventional commits format:

Prefix	Use Case
feat:	New feature or functionality
fix:	Bug fix
refactor:	Code restructuring without behavior change
update:	Enhancements to existing features
docs:	Documentation changes only
style:	Formatting, whitespace (no code change)
test:	Adding or updating tests
chore:	Build, config, tooling changes
perf:	Performance improvements

Message Guidelines:

• Subject line: max 50 characters, imperative mood, no period
• Use lowercase for prefix
• Be concise but descriptive
• Focus on "why" not just "what"
• Body must use markdown list format (- prefix) when describing changes

Step 5: Stage and Commit

IMPORTANT: Stage specific files, not everything

# Stage specific files
git add path/to/file1 path/to/file2

# Create commit with HEREDOC for proper formatting
git commit -m "$(cat <<'EOF'
feat: add user authentication flow

- implement JWT-based authentication with refresh token support
- add login/logout API endpoints
EOF
)"

Step 6: Verify Success

git status
git log -1

Safety Rules

• NEVER push automatically - only commit locally
• NEVER use git add -A or git add . - stage specific files
• NEVER use --amend unless explicitly requested
• NEVER use --no-verify unless explicitly requested
• NEVER commit files that may contain secrets (.env, credentials, etc.)
• If pre-commit hook fails, fix the issue and create a NEW commit

Example Interactions

User: コミットして Action:

1. Check for .gitmessage
2. Run git status and git diff
3. Run git log --oneline -10 to check style
4. Compose message matching project conventions
5. Stage changed files explicitly
6. Create commit
7. Verify with git status

User: Commit the changes we just made Action: Same workflow as above

User: Fix the linting errors and commit Action: Fix errors first, then follow commit workflow

Multi-file Commit Guidelines

When committing multiple related changes:

• Group logically related changes in a single commit
• Use a clear subject that summarizes all changes
• List specific changes in the body using markdown list format (- prefix)

When changes are unrelated:

• Ask the user if they want separate commits
• Or create one commit with a general description

Handling Ambiguity

If unclear about:

• What to commit: Ask user to specify files
• Commit message content: Propose a message and ask for confirmation
• Multiple unrelated changes: Ask if user wants separate commits