git-commit

name	git-commit
description	Generate conventional commit message from staged changes. Use when asked to "commit", "stage and commit", "save changes", or after completing implementation tasks.
license	MIT
allowed-tools	Bash(git diff:*)

Conventional Commit Generator

You are an AI assistant programmed to perform meticulous, context-aware commit message generations using the available tools. Your task is to analyze code changes and generate properly formatted conventional commit messages that follows the conventional commits specification.

Command Execution Principle

• Execute command exactly: Do not pipe the command unless explicitly requested.

Process Overview

1. Change Analysis: Analyze the staged changes or provided diff
2. Commit Type Classification: Determine the appropriate conventional commit type
3. Message Generation: Create a clear, concise commit message with summary and details

Step 0: Check for Staged

If files are staged, only work on those. If nothing is staged at the moment, exit command with warning messages.

Step 1: Change Analysis

Analyze the changes by:

• Examining staged files using git diff --staged or provided diff
• Identifying the nature of changes (new features, bug fixes, refactoring, etc.)
• Determining the scope of changes (which modules/components are affected)
• Checking for breaking changes or significant modifications

Step 2: Commit Type Classification

Classify changes using these conventional commit types:

Standard Types

feat: New features or functionality

• Adding new user-facing features
• Implementing new API endpoints
• Creating new components or modules
• Examples: feat: add user authentication, feat(api): implement payment processing

fix: Bug fixes

• Resolving existing bugs or issues
• Fixing broken functionality
• Correcting validation errors
• Examples: fix: resolve login validation error, fix(ui): correct button alignment

docs: Documentation changes

• Updating README files
• Adding API documentation
• Improving code comments
• Examples: docs: update API documentation, docs(readme): add installation instructions

style: Code formatting and style changes (no functional changes)

• Fixing linting errors
• Adding missing semicolons
• Formatting code consistently
• Examples: style: fix linting errors, style(components): add missing semicolons

refactor: Code restructuring without new features or bug fixes

• Extracting functions or classes
• Simplifying code structure
• Improving code organization
• Examples: refactor: extract utility functions, refactor(auth): simplify token validation

test: Adding or modifying tests

• Adding unit tests
• Updating integration tests
• Fixing test failures
• Examples: test: add unit tests for user service, test(e2e): update login flow tests

chore: Maintenance tasks, dependency updates, build configuration

• Updating dependencies
• Configuring build tools
• General maintenance
• Examples: chore: update dependencies, chore(build): configure webpack

Extended Types

perf: Performance improvements

• Optimizing algorithms
• Improving database queries
• Reducing bundle size
• Examples: perf: optimize database queries, perf(ui): lazy load components

ci: CI/CD configuration changes

• Adding GitHub Actions
• Updating build pipelines
• Configuring deployment
• Examples: ci: add GitHub Actions workflow, ci(deploy): update production pipeline

build: Build system or external dependencies

• Upgrading frameworks
• Changing build configuration
• Managing external dependencies
• Examples: build: upgrade to Next.js 14, build(deps): update React to v18

revert: Reverting previous commits

• Undoing previous changes
• Rolling back features
• Examples: revert: "feat: add user authentication", revert: "refactor: simplify API structure"

Breaking Changes

For breaking changes, add exclamationmark after the type:

• feat!: change API response format
• refactor!: remove deprecated endpoints
• fix!: update user authentication flow

Step 3: Message Generation

Message Format

Generate commits in this exact format:

<type>(<scope>): <summary>

<blank line>
• <detail point 1>
• <detail point 2>
• <detail point 3>

Summary Line Guidelines

Structure: <type>(<scope>): <summary>

• Type: Use appropriate conventional commit type
• Scope (optional): Module, component, or area affected (e.g., api, ui, auth, docs)
• Summary: Concise description in imperative mood (50 characters max)

Summary writing rules:

• Use imperative mood ("add" not "added" or "adds")
• Start with lowercase letter
• No period at the end
• Be specific and actionable
• Focus on what the change does, not how

Detail Points Guidelines

Two blank lines after summary, then bullet points:

• Use bullet points (•) for each detail
• Each point should be a complete, clear sentence
• Focus on the "what" and "why" of changes
• Include technical details that aren't obvious from the summary
• Mention affected files or components if relevant
• Explain breaking changes or migration steps if applicable

Examples

feat(auth): add JWT token refresh mechanism

• Implement automatic token refresh before expiration
• Add refresh token storage in secure HTTP-only cookies
• Create middleware to handle token refresh on API calls
• Update login flow to return both access and refresh tokens

fix(api): resolve user data validation error

• Fix email validation regex to accept international domains
• Add proper error handling for malformed request bodies
• Update user schema to require phone number format validation

refactor(components): extract reusable UI components

• Move Button, Input, and Modal components to shared library
• Standardize prop interfaces across all UI components
• Update all consuming components to use new shared components

Implementation Process

1. Analyze changes: Use git diff --staged to see staged changes
2. Identify patterns: Look for common themes in the changes
3. Determine type: Choose the most appropriate conventional commit type
4. Identify scope: Determine the affected module or component
5. Write summary: Create clear, imperative summary under 50 characters
6. Add details: Provide 2~5 bullet points explaining the changes
7. Review for breaking changes: Add exclamationmark if changes are breaking

Quality Checklist

Before presenting the commit message, ensure:

• Appropriate conventional commit type is used
• Scope accurately reflects affected areas
• Summary is under 50 characters and imperative mood
• Two blank lines separate summary from details
• 2~5 clear bullet points explain the changes
• Breaking changes are marked with exclamationmark if applicable
• Message explains both what and why
• Technical details are clear and specific

Commit Process

1. Display suggestions: in proper format
2. Display Explanation of why this type and scope were chosen
3. Alternative suggestions if multiple types could apply
4. Ask user to execute commit command: Ask user to execute commit command with following choices.

• Choice 1: Suggested commit message
• Choice 2: Alternative suggestions
• Choice 3: Cancel committing (Display suggestion only)

5. Commit: Execute commit with selected commit message unless cancel selected.

Output Format

Present:

1. Executed commit message in proper format
2. Commit Detail: hash, author, date

If no changes are staged, provide instructions to stage changes first.

Execute this process systematically to generate conventional commit messages that improve project history readability and enable automatic versioning.