Git Commit

Git Commit

Comprehensive Git commit protocol implementing Conventional Commits specification with strict safety rules, proper attribution, and complete workflow guidance.

Table of Contents

• Overview
• When to Use This Skill
• Critical Safety Rules (NEVER)
• Conventional Commits Format
• Commit Workflow (4 Steps)
• Pull Request Creation
• When to Commit
• System Changes Documentation
• Examples
• Resources
• Troubleshooting
• Best Practices
• Testing
• Version History

Overview

This skill provides the authoritative protocol for all Git commit operations, including:

• Conventional Commits format with required attribution footer
• Intelligent staging decisions handling mixed staged/unstaged scenarios
• Safety rules preventing destructive operations
• 4-step commit workflow ensuring proper execution
• Pre-commit hook handling for automated tooling failures
• Pull request creation with complete context
• System changes verification before committing

CRITICAL: This skill must be invoked before ANY commit operation to ensure compliance with safety protocols and message formatting requirements.

When to Use This Skill

This skill should be used when:

• Creating any Git commit (regular, initial, merge)
• Drafting commit messages following Conventional Commits
• Handling pre-commit hook failures or modifications
• Creating pull requests with gh pr create
• Uncertain about commit timing (when to commit vs when to wait)
• Validating commit safety (checking for secrets, absolute paths, etc.)
• Amending commits (rare - requires safety checks)
• Verifying system changes documentation before committing

IMPORTANT: Only create commits when the user explicitly requests. If unclear, ask first.

Critical Safety Rules (NEVER)

These rules are non-negotiable and MUST be followed:

NEVER Rules

1. NEVER update git config - Configuration changes must be intentional and user-approved
2. NEVER run destructive commands - No git push --force, git reset --hard, etc. unless explicitly requested
3. NEVER skip hooks - No --no-verify or --no-gpg-sign flags unless explicitly requested by user
4. NEVER force push to main/master - Warn user if they request this
5. NEVER use git commit --amend - ONLY permitted when:
   • User explicitly requests amend, OR
   • Pre-commit hook modified files (requires safety checks - see Hook Handling)
6. NEVER commit without explicit user request - This is VERY IMPORTANT - only commit when user asks
7. NEVER commit secret files - Do not commit .env, credentials.json, etc. - warn user if requested
8. NEVER use interactive git commands - No -i flags (git rebase -i, git add -i) - not supported in non-interactive environments

Safety Verification Before Committing

Before executing any commit:

• ✅ Check for secrets - Scan staged files for common secret patterns
• ✅ Check for absolute paths - Ensure no machine-specific paths (like D:\repos\..., /home/user/...)
• ✅ Verify SYSTEM-CHANGES.md - If any files outside repo were modified (configs, keys, etc.), ensure documented
• ✅ Confirm user intent - If unclear whether to commit, ask user first

Conventional Commits Format

All commit messages MUST follow the Conventional Commits specification with required Claude Code attribution.

Basic Structure

<type>[optional scope]: <description>

[optional body]

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Commit Types

Use these standardized types:

• feat: New feature (correlates to MINOR in SemVer)
• fix: Bug fix (correlates to PATCH in SemVer)
• docs: Documentation changes only
• style: Code style changes (formatting, missing semicolons, no logic change)
• refactor: Code refactoring (neither fixes bug nor adds feature)
• perf: Performance improvements
• test: Adding or updating tests
• chore: Maintenance tasks (dependencies, tooling, configs)
• ci: CI/CD configuration changes
• build: Build system or external dependency changes

Breaking Changes

Indicate breaking changes using EITHER:

1. Exclamation mark before colon: feat!: change API response format
2. BREAKING CHANGE footer: Include BREAKING CHANGE: <description> in message body

Scope (Optional)

Add scope to provide context about what area of codebase is affected:

feat(api): add user authentication endpoint
fix(database): resolve connection timeout issue
docs(readme): update installation instructions

Message Guidelines

• Description: Start with lowercase, no period at end, max ~50 characters
• Focus on WHY, not WHAT: Explain intent and reason, not just the change
• Be concise: 1-2 sentences in body if needed
• Use imperative mood: "add feature" not "added feature" or "adds feature"

Complete Message Example

git commit -m "$(cat <<'EOF'
feat(auth): add JWT token refresh mechanism

Implements automatic token refresh to improve user experience
and reduce unnecessary re-authentication.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
EOF
)"

Commit Workflow (4 Steps)

Follow this complete workflow for every commit operation.

Step 1: Gather Information (Parallel)

Run these commands in parallel to understand current state:

# View all staged and unstaged changes
git status

# See exact modifications (staged and unstaged)
git diff
git diff --staged

# Review recent commits to understand message style
git log --oneline -10

Why parallel: These are independent readonly operations - no dependencies between them.

Step 2: Determine Staging Strategy and Draft Message

Based on gathered information, first determine what to commit, then draft the message.

2.1: Analyze Staging State

Count the files in each category from git status:

• Staged files: Files in "Changes to be committed" section
• Modified files: Files in "Changes not staged for commit" section (tracked files modified)
• Untracked files: Files in "Untracked files" section

2.2: Apply Staging Decision Logic

Scenario A: Nothing to commit (staged=0, modified=0, untracked=0)

Working tree is clean - nothing to commit.

Exit gracefully. No commit needed.

Scenario B: Files staged, nothing modified (staged>0, modified=0)

Proceed directly to commit. User has already staged exactly what they want.

Scenario C: Nothing staged, but changes exist (staged=0, modified>0 or untracked>0)

Ask user what to commit using AskUserQuestion:

"I see {N} modified file(s) but nothing is staged yet. What would you like to commit?"

Options:
1. "Stage and commit all modified files" → `git add -u` (stage all tracked files)
2. "Let me stage specific files first" → Exit, let user stage manually, then re-run /commit

If user chooses option 1, proceed with all modified files. If user chooses option 2, exit and inform them to run git add <files> then /commit again.

Scenario D: Mixed staging (staged>0, modified>0)

Ask user using AskUserQuestion:

"I see {N} file(s) staged and {M} file(s) modified but not staged. What would you like to commit?"

Options:
1. "Commit only the staged files" → Proceed with staged files only
2. "Stage and commit everything" → `git add -u` then commit all

Respect user's choice.

2.3: Draft Commit Message

After confirming what will be committed:

1. Review all changes to be committed
2. Determine commit type - feat, fix, docs, refactor, style, etc.
3. Draft concise message following Conventional Commits format
4. Verify no secrets - Check for .env, credentials.json, API keys, tokens
5. Verify no absolute paths - Ensure no D:\repos\..., /home/user/... in committed content
6. Check SYSTEM-CHANGES.md - If any system files touched, verify documented

Message drafting checklist:

• Correct type (feat/fix/docs/etc.)
• Optional scope if applicable
• Imperative mood description
• Body paragraph if needed (explain WHY)
• Attribution footer included
• Breaking change notation if applicable

Step 3: Execute Commit (Sequential)

Run these commands in sequence (dependencies exist):

# Stage files if needed (based on Step 2 decision)
# - If user chose "stage all": git add -u
# - If files already staged: skip this step
# - If user is staging specific files: they should do this before running /commit

# Create commit with HEREDOC format (REQUIRED)
git commit -m "$(cat <<'EOF'
<type>[scope]: <description>

[optional body]

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
EOF
)"

# Verify commit succeeded
git status

Why sequential: Each operation depends on the previous completing successfully.

CRITICAL: ALWAYS use HEREDOC format with $(cat <<'EOF' ... EOF) to ensure proper formatting and avoid shell escaping issues.

Staging commands reference:

• git add -u - Stage all tracked modified files (doesn't include new untracked files)
• git add -A - Stage everything (tracked + untracked, modifications + deletions)
• git add <file> - Stage specific file(s)

Step 4: Handle Pre-Commit Hook Failures

If commit fails due to pre-commit hooks (linters, formatters, etc.):

Retry ONCE if hook modified files:

# Check if files were modified by hook
git diff

# If modifications exist, check if safe to amend
git log -1 --format='%an %ae'  # Check authorship (must be you)
git status                      # Check not pushed (must show "ahead of")

# If BOTH checks pass, amend the commit:
git add .
git commit --amend --no-edit

# If EITHER check fails, create NEW commit instead:
git add .
git commit -m "$(cat <<'EOF'
chore: apply automated linting fixes

Pre-commit hooks applied automatic formatting changes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
EOF
)"

Amend safety protocol:

• ✅ Check authorship first: git log -1 --format='%an %ae' - Only amend YOUR commits
• ✅ Check not pushed: git status must show "Your branch is ahead" (not pushed to remote)
• ✅ Only if BOTH pass: Then amend is safe
• ❌ If EITHER fails: Create new commit instead - NEVER amend others' commits or pushed commits

When to skip retry:

• Hook failed with errors (not just warnings)
• Hook did not modify files
• Safety checks failed (not your commit or already pushed)

Pull Request Creation

When user requests pull request creation, follow this workflow.

Step 1: Understand Branch Context (Parallel)

# View current branch status
git status

# See all changes since divergence from base branch
git diff main...HEAD    # Or other base branch
git log main...HEAD     # All commits that will be in PR

# Check remote tracking status
git branch -vv

Step 2: Analyze ALL Commits

Review ALL commits that will be included in PR (NOT just the latest commit):

• Read all commit messages
• Understand full scope of changes
• Draft comprehensive PR summary covering entire branch

Step 3: Create Pull Request (Sequential)

# Create new branch if needed
git checkout -b feature-branch-name

# Push to remote with tracking
git push -u origin feature-branch-name

# Create PR using HEREDOC for body
gh pr create --title "feat: Brief PR title" --body "$(cat <<'EOF'
## Summary
- Bullet point summary of changes
- Key features or fixes
- Breaking changes if any

## Test plan
- [ ] Manual testing steps
- [ ] Automated tests added/updated
- [ ] Documentation updated

🤖 Generated with [Claude Code](https://claude.com/claude-code)
EOF
)"

Return PR URL when complete so user can view it.

DO NOT push to remote unless user explicitly requests PR creation or push.

When to Commit

Only create commits when:

• ✅ User explicitly requests: "Create a commit", "Commit these changes", "Make a commit", etc.
• ✅ User confirms when asked for clarification
• ✅ Completing a task where commit was part of explicit requirements

Do NOT commit when:

• ❌ User asks to "save" or "update" without mentioning commit/git
• ❌ Completing edits without explicit commit request
• ❌ Uncertain about user intent
• ❌ Multiple logical changes that should be separate commits

If unclear, ASK: "Would you like me to create a commit with these changes?"

System Changes Documentation

CRITICAL REQUIREMENT: Before committing, verify all system-level changes are documented.

What Requires Documentation

Any changes made outside this repository:

• Configuration files (~/.gitconfig, ~/.ssh/config, etc.)
• System-level keys or credentials (GPG keys, SSH keys)
• Cloud resources (GitHub Secrets, environment variables)
• Installed packages or tools
• Environment variable modifications

Verification Process

Before executing commit:

1. Ask yourself: "Did I modify any files outside this repo?"
2. If YES: Check that SYSTEM-CHANGES.md has been updated
3. If NO: Proceed with commit

See SYSTEM-CHANGES.md format requirements in repository documentation.

Examples

For concrete examples of common commit scenarios, see references/examples.md:

• Simple feature additions with proper scoping
• Bug fixes with detailed explanations
• Breaking changes with proper notation
• Documentation-only commits
• Multi-file refactoring examples

All examples follow Conventional Commits specification with required Claude Code attribution.

Resources

This skill includes comprehensive reference documentation:

references/

• See references/conventional-commits-spec.md for complete Conventional Commits specification
• See references/safety-protocol.md for detailed safety rules and rationale
• See references/workflow-steps.md for expanded workflow guidance with examples
• See references/hook-handling.md for complete pre-commit hook failure handling procedures
• See references/examples.md for concrete commit examples following best practices
• See references/troubleshooting.md for common issues and solutions
• See references/testing.md for test scenarios and multi-model testing notes

Troubleshooting

For solutions to common Git commit issues, see references/troubleshooting.md:

• GPG signing failures
• Pre-commit hook issues
• Commit type selection guidance
• Mixed staging state handling
• Amend safety check failures

All troubleshooting solutions follow safety protocols and never bypass hooks or GPG signing.

Best Practices

• ✅ Always use HEREDOC format for commit messages - ensures proper formatting
• ✅ Review changes before committing - Run git diff and git status first
• ✅ Commit logically related changes together - Don't mix unrelated edits
• ✅ Write descriptive commit messages - Focus on WHY, not just WHAT
• ✅ Use scopes consistently - Pick scope names and stick with them across commits
• ✅ Invoke git-commit skill - Always use this skill before committing to ensure compliance
• ✅ Verify system changes documented - Check SYSTEM-CHANGES.md before committing
• ✅ Follow safety protocols - Never skip hooks or bypass GPG signing
• ❌ Never commit secrets - Add .env, credentials.json to .gitignore
• ❌ Never commit absolute paths - Use relative paths or placeholders
• ❌ Never commit without explicit request - Only commit when user asks

Testing

For comprehensive test scenarios and multi-model testing guidance, see references/testing.md:

• Six detailed test scenarios covering common use cases
• Multi-model testing notes (Sonnet, Haiku, Opus)
• Expected behavior and success criteria for each scenario
• Evaluation criteria for skill quality assessment

Current testing status: Verified with Sonnet. Haiku and Opus testing pending.

Version History

• v1.3.1 (2025-11-25): Audit improvements - standardize model references to use model families (Sonnet, Haiku, Opus) instead of specific versions, add Last Verified dates to examples.md, troubleshooting.md, and testing.md for consistency
• v1.3.0 (2025-11-17): Optimize SKILL.md for token efficiency - move Examples, Troubleshooting, and Testing to separate reference files; remove empty assets/ and scripts/ directories; improve progressive disclosure pattern
• v1.2.0 (2025-11-13): Add test scenarios and multi-model testing documentation, add execution verbs to description, remove unused template files from scripts/ and assets/ directories
• v1.1.0 (2025-11-13): Add intelligent staging decision logic - handles mixed staged/unstaged scenarios, asks user intent when ambiguous, detects "nothing to commit" gracefully
• v1.0.0 (2025-11-13): Initial release - comprehensive git commit skill with Conventional Commits specification, safety protocols, and complete workflow guidance

Last Updated

Date: 2025-11-28 Model: claude-opus-4-5-20251101

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