GLINCKER Changelog Generator
Automatically generate CHANGELOG.md from git commit history following Keep a Changelog format. Groups changes by type, links commits, and maintains semantic versioning.
What This Skill Does
- Parses git commit history
- Groups changes by type (Added, Changed, Fixed, etc.)
- Follows Keep a Changelog format
- Links to commits and PRs
- Supports conventional commits
- Updates existing CHANGELOG.md
Instructions
Phase 1: Analyze Git History
# Get commits since last release
git log v1.0.0..HEAD --pretty=format:"%H|%s|%an|%ad" --date=short
# Or all commits if no releases
git log --pretty=format:"%H|%s|%an|%ad" --date=short
Phase 2: Parse Commit Messages
Detect commit types (Conventional Commits):
feat: Add user authentication → Added
fix: Resolve login bug → Fixed
docs: Update README → Documentation
refactor: Simplify auth logic → Changed
perf: Optimize database queries → Changed
test: Add unit tests → Testing
chore: Update dependencies → Maintenance
Phase 3: Generate CHANGELOG
Format (Keep a Changelog):
# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Added
- User authentication with JWT tokens [#42](https://github.com/user/repo/pull/42)
- Password reset functionality [@johndoe](https://github.com/johndoe) [abc123](https://github.com/user/repo/commit/abc123)
- Two-factor authentication support
### Changed
- Improved error handling in API endpoints
- Updated UI components to use new design system
- Refactored database connection pooling
### Fixed
- Login button not working on mobile devices [#38](https://github.com/user/repo/issues/38)
- Memory leak in background job processor
- SQL injection vulnerability in search endpoint
### Security
- Updated dependencies with known vulnerabilities
- Implemented rate limiting on auth endpoints
- Added CSRF protection
## [1.2.0] - 2025-01-10
### Added
- Dark mode support
- Export data to CSV functionality
### Fixed
- Cache invalidation issue
- Timezone handling in date picker
## [1.1.0] - 2025-01-05
### Added
- User profile customization
- Email notifications
### Changed
- Improved performance of dashboard queries
## [1.0.0] - 2025-01-01
### Added
- Initial release
- Core functionality
- Basic user management
- API endpoints
[Unreleased]: https://github.com/user/repo/compare/v1.2.0...HEAD
[1.2.0]: https://github.com/user/repo/compare/v1.1.0...v1.2.0
[1.1.0]: https://github.com/user/repo/compare/v1.0.0...v1.1.0
[1.0.0]: https://github.com/user/repo/releases/tag/v1.0.0
Change Categories
Added
- New features
- New functionality
- New endpoints
Changed
- Changes in existing functionality
- Refactoring
- Performance improvements
- UI/UX updates
Deprecated
- Soon-to-be removed features
- Marked for removal
Removed
- Removed features
- Deleted functionality
Fixed
- Bug fixes
- Issue resolutions
- Error corrections
Security
- Security patches
- Vulnerability fixes
- Security improvements
Conventional Commits Support
Automatically categorize based on prefix:
feat: → Added
fix: → Fixed
docs: → Documentation
style: → Changed
refactor: → Changed
perf: → Changed
test: → Testing
build: → Build
ci: → CI/CD
chore: → Maintenance
revert: → Reverted
Advanced Features
Link to Issues/PRs
### Fixed
- Login bug (#42) → Links to issue
- API timeout (PR #45) → Links to PR
- Memory leak [abc123] → Links to commit
Breaking Changes
## [2.0.0] - 2025-01-15
### ⚠️ BREAKING CHANGES
- Removed support for Node.js 14
- Changed API response format for /users endpoint
- Renamed environment variable `API_KEY` to `APP_API_KEY`
### Migration Guide
1. Update Node.js to version 18 or higher
2. Update API client to handle new response format
3. Rename environment variables in .env file
Semantic Version Detection
Based on changes:
- Major (X.0.0): Breaking changes
- Minor (0.X.0): New features (backward compatible)
- Patch (0.0.X): Bug fixes only
Tool Requirements
- Bash: Execute git commands
- Write: Create/update CHANGELOG.md
- Read: Read existing CHANGELOG
Examples
Example 1: Generate from Scratch
User: "Generate CHANGELOG from git history"
Output:
# Changelog
## [Unreleased]
### Added
- 15 new features
### Fixed
- 8 bug fixes
### Changed
- 12 improvements
(Full detailed changelog)
Example 2: Update Existing
User: "Update CHANGELOG with latest commits"
Process:
- Read existing CHANGELOG.md
- Get commits since last version
- Add to [Unreleased] section
- Preserve existing entries
Example 3: Release Version
User: "Generate CHANGELOG for v2.0.0 release"
Process:
- Move [Unreleased] to [2.0.0]
- Add release date
- Create new [Unreleased] section
- Update comparison links
Best Practices
- Conventional Commits: Use consistent commit message format
- Detailed Messages: Write descriptive commit messages
- Link Issues: Reference issues/PRs in commits
- Regular Updates: Update CHANGELOG with each release
- Breaking Changes: Always document breaking changes prominently
Changelog
Version 1.0.0
- Initial release
- Conventional Commits support
- Keep a Changelog format
- Issue/PR linking
- Breaking changes detection
Author
GLINCKER Team
- Repository: claude-code-marketplace