--- name: changelog-maintenance description: Maintain comprehensive changelogs and release notes following Keep a Changelog format. Use when documenting version history, release notes, or tracking changes across versions. --- # Changelog Maintenance ## Overview Create and maintain structured changelogs that document all notable changes to your project, following industry best practices like Keep a Changelog and Semantic Versioning. ## When to Use - Version history documentation - Release notes generation - Breaking changes tracking - Migration guide creation - Deprecation notices - Security patch documentation - Feature announcements - Bug fix tracking ## CHANGELOG.md Template ```markdown # 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 - New feature or capability that has been added - Can be multiple items ### Changed - Changes in existing functionality - Updates to how features work ### Deprecated - Features that will be removed in upcoming releases - Include timeline for removal ### Removed - Features that have been removed - Previously deprecated features ### Fixed - Bug fixes - Security patches ### Security - Security vulnerabilities that have been fixed - Important security updates ## [2.1.0] - 2025-01-15 ### Added - Added OAuth2 authentication support for GitHub and Google - New dashboard widget system for customizable layouts - Bulk operations API for processing multiple records - Export to Excel functionality with custom templates - Dark mode theme support across all pages - WebSocket support for real-time notifications - GraphQL API alongside existing REST endpoints - Internationalization support for 10 new languages - Spanish, French, German, Italian, Portuguese - Japanese, Korean, Chinese (Simplified/Traditional), Arabic ### Changed - Updated user profile page with improved layout and performance - Migrated from REST to GraphQL for main API endpoints - Improved error messages with more context and suggestions - Refactored authentication system for better security - Updated dependencies to latest versions - React 18.2.0 → 19.0.0 - Node.js 16.x → 18.x (minimum required version) - PostgreSQL 13 → 14 - Changed default pagination from 20 to 50 items - Improved search algorithm for 3x faster results ### Deprecated - REST API v1 endpoints (will be removed in v3.0.0) - Use GraphQL API or REST API v2 instead - Migration guide: [docs/migration-v1-to-v2.md](docs/migration-v1-to-v2.md) - Legacy authentication tokens (remove by 2025-06-01) - Replace with JWT tokens - Old configuration format in `config.json` - Use new YAML format in `config.yaml` ### Removed - Removed deprecated `/api/users/list` endpoint - Use `/api/v2/users` instead - Removed support for Internet Explorer 11 - Minimum browser versions: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+ - Removed jQuery dependency (now pure JavaScript) - Removed old dashboard widgets (replaced with new widget system) ### Fixed - Fixed race condition in order processing causing duplicate charges - Affected versions: 2.0.0 - 2.0.5 - Issue: [#1234](https://github.com/user/repo/issues/1234) - Fixed memory leak in WebSocket connections - Fixed incorrect timezone handling in date pickers - Fixed CSV export not including all columns - Fixed CSRF vulnerability in form submissions (CVE-2025-12345) - Fixed accessibility issues in navigation menu - Now fully keyboard navigable - Screen reader friendly - Fixed mobile responsive issues on iPad Pro - Fixed SQL injection vulnerability in search (CVE-2025-12346) - **Security Impact**: High - **Affected Versions**: 2.0.0 - 2.0.9 - **Recommended Action**: Upgrade immediately ### Security - **CRITICAL**: Fixed SQL injection in user search (CVE-2025-12346) - Impact: Allows unauthorized database access - Affected: v2.0.0 to v2.0.9 - Action: Upgrade to v2.1.0 immediately - Fixed XSS vulnerability in comment rendering (CVE-2025-12347) - Updated all dependencies with known security vulnerabilities - Implemented rate limiting on all API endpoints - Added CSRF protection to all forms - Enabled Content Security Policy headers ## [2.0.5] - 2025-01-08 ### Fixed - Hotfix: Critical bug causing data loss in export functionality - Fixed authentication issues with LDAP integration - Resolved performance degradation with large datasets ### Security - Patched authentication bypass vulnerability (CVE-2025-12344) ## [2.0.0] - 2025-01-01 ### Added - Complete UI redesign with modern look and feel - New REST API v2 with better performance - User roles and permissions system - Audit logging for all administrative actions - Email templates customization - Two-factor authentication (2FA) - API rate limiting - Database backup automation ### Changed - **BREAKING**: Changed API response format from XML to JSON - All API consumers must update their integration - See migration guide: [docs/api-v1-to-v2.md](docs/api-v1-to-v2.md) - **BREAKING**: Renamed database tables for consistency - `user` → `users` - `order` → `orders` - Run migration script: `npm run migrate:v2` - **BREAKING**: Changed authentication from session-based to JWT - Existing sessions will be invalidated - Users need to log in again - Improved database query performance by 50% - Updated minimum Node.js version to 16.x ### Removed - **BREAKING**: Removed support for Node.js 12 and 14 - **BREAKING**: Removed deprecated configuration options - `USE_OLD_AUTH` - Use JWT authentication - `LEGACY_MODE` - No longer supported ### Migration Guide **From v1.x to v2.0:** 1. Update Node.js to version 16 or higher 2. Update your API integration: ```javascript // Old (v1) fetch('/api/users/list') .then(res => res.text()) .then(xml => parseXML(xml)); // New (v2) fetch('/api/v2/users') .then(res => res.json()) .then(data => console.log(data)); ``` 3. Run database migrations: ```bash npm run migrate:v2 ``` 4. Update environment variables: ```env # Remove USE_OLD_AUTH=true LEGACY_MODE=true # Add JWT_SECRET=your-secret-key JWT_EXPIRES_IN=7d ``` ## [1.5.2] - 2024-12-15 ### Fixed - Fixed pagination bug on user list page - Resolved timezone issues in reports - Fixed email notification delays ## [1.5.0] - 2024-12-01 ### Added - New reporting dashboard - Custom fields for user profiles - Webhook support for integrations ### Changed - Improved search performance - Updated UI components library ## [1.0.0] - 2024-10-01 ### Added - Initial release - User management - Basic API - Authentication and authorization - Database migrations - Unit and integration tests [Unreleased]: https://github.com/user/repo/compare/v2.1.0...HEAD [2.1.0]: https://github.com/user/repo/compare/v2.0.5...v2.1.0 [2.0.5]: https://github.com/user/repo/compare/v2.0.0...v2.0.5 [2.0.0]: https://github.com/user/repo/compare/v1.5.2...v2.0.0 [1.5.2]: https://github.com/user/repo/compare/v1.5.0...v1.5.2 [1.5.0]: https://github.com/user/repo/compare/v1.0.0...v1.5.0 [1.0.0]: https://github.com/user/repo/releases/tag/v1.0.0 ``` ## Release Notes Template ```markdown # Release Notes - Version 2.1.0 **Release Date:** January 15, 2025 **Download:** [v2.1.0](https://github.com/user/repo/releases/tag/v2.1.0) ## 🎉 Highlights - **OAuth2 Authentication**: Sign in with GitHub and Google - **GraphQL API**: New GraphQL endpoint alongside REST API - **Dark Mode**: Full dark mode support across all pages - **Real-time Notifications**: WebSocket-powered live updates - **10 New Languages**: Expanded internationalization support ## 📦 What's New ### OAuth2 Authentication You can now sign in using your GitHub or Google account. Configure OAuth in Settings > Authentication. ```javascript // Enable OAuth in your config { "auth": { "providers": ["github", "google"], "github": { "clientId": "your-client-id", "clientSecret": "your-client-secret" } } } ``` ### GraphQL API Access your data with GraphQL for more efficient queries: ```graphql query GetUser { user(id: "123") { id name email orders { id total items { product { name price } } } } } ``` **Endpoint:** `https://api.example.com/graphql` **Documentation:** [GraphQL API Docs](https://docs.example.com/graphql) ### Dark Mode Enable dark mode in Settings > Appearance or use system preferences. ![Dark Mode Screenshot](screenshots/dark-mode.png) ## 🔧 Improvements - **3x Faster Search**: Improved search algorithm - **Better Error Messages**: More helpful error messages with suggestions - **Enhanced Performance**: 50% faster page loads - **Mobile Improvements**: Better responsive design for tablets ## 🐛 Bug Fixes - Fixed race condition in order processing - Fixed memory leak in WebSocket connections - Fixed timezone handling in date pickers - Fixed accessibility issues in navigation ## 🔒 Security Updates - **CRITICAL**: Fixed SQL injection vulnerability (CVE-2025-12346) - **Impact**: High - Allows unauthorized database access - **Action**: Upgrade immediately if using v2.0.0 - v2.0.9 - Fixed XSS vulnerability in comment rendering (CVE-2025-12347) - Updated dependencies with security patches ## 📋 Breaking Changes ### Deprecated APIs (Removal in v3.0.0) The following REST API v1 endpoints are deprecated and will be removed in v3.0.0: | Old Endpoint | New Endpoint | Migration Guide | |--------------|--------------|-----------------| | `/api/users/list` | `/api/v2/users` | [Link](docs/migration.md#users) | | `/api/products/search` | `/api/v2/products?q=` | [Link](docs/migration.md#products) | **Timeline**: These endpoints will continue working until June 2025. ### Updated Dependencies - **Node.js**: Minimum version is now 18.x (was 16.x) - **React**: Upgraded to 19.0.0 - **PostgreSQL**: Minimum version is now 14 (was 13) ## 📖 Documentation - [Full Changelog](CHANGELOG.md) - [API Migration Guide](docs/api-migration.md) - [Upgrade Guide](docs/upgrade-guide.md) - [API Documentation](https://docs.example.com/api) ## 🔄 Upgrading ### From v2.0.x ```bash # Backup your database first pg_dump your_database > backup.sql # Pull latest version git pull origin main # Install dependencies npm install # Run migrations npm run migrate # Restart application npm start ``` ### From v1.x Please see the [v1 to v2 Migration Guide](docs/v1-to-v2-migration.md) for detailed upgrade instructions. ## 🙏 Contributors Thanks to all contributors who made this release possible: - @contributor1 - OAuth2 implementation - @contributor2 - GraphQL API - @contributor3 - Dark mode - @contributor4 - Performance improvements ## 📞 Support - **Issues**: [GitHub Issues](https://github.com/user/repo/issues) - **Discussions**: [GitHub Discussions](https://github.com/user/repo/discussions) - **Documentation**: [docs.example.com](https://docs.example.com) - **Email**: support@example.com ## 🔜 What's Next? Coming in v2.2.0: - Advanced analytics dashboard - Plugin system for extensibility - Mobile apps (iOS and Android) - Improved team collaboration features Stay tuned! ``` ## Semantic Versioning Guide ``` Version: MAJOR.MINOR.PATCH MAJOR version: Incompatible API changes MINOR version: Add functionality (backwards-compatible) PATCH version: Backwards-compatible bug fixes Examples: - 1.0.0 → 1.0.1: Bug fixes - 1.0.1 → 1.1.0: New features (backwards-compatible) - 1.1.0 → 2.0.0: Breaking changes ``` ## Best Practices ### ✅ DO - Follow Keep a Changelog format - Use Semantic Versioning - Document breaking changes prominently - Include migration guides - Link to relevant issues/PRs - Categorize changes (Added, Changed, Fixed, etc.) - Include security fixes in separate section - Date all releases (YYYY-MM-DD format) - Link to release tags - Document deprecations with timelines - Include upgrade instructions - Mention contributors ### ❌ DON'T - Skip documenting breaking changes - Forget to update changelog before release - Mix multiple types in one category - Use vague descriptions - Skip dates on releases - Forget semantic versioning - Hide security issues ## Resources - [Keep a Changelog](https://keepachangelog.com/) - [Semantic Versioning](https://semver.org/) - [Conventional Commits](https://www.conventionalcommits.org/) - [Release Drafter](https://github.com/release-drafter/release-drafter)