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+# Antigravity ClaudeKit Skills - Changelog
+
+**All notable changes to this project are documented below.**
+
+Format: [ISO Date] | Version | Type | Description
+
+---
+
+## [1.0.0] — 2026-02-16
+
+### RELEASE SUMMARY
+Initial production release of Antigravity ClaudeKit Skills. Successfully converted 76 battle-tested skills from ClaudeKit into standalone Antigravity IDE format, with full validation and zero Task/Hook dependencies.
+
+### FEATURES (New)
+
+#### Core Workflow (12 skills)
+Comprehensive AI-assisted development workflow.
+
+- **ck-brainstorm**: Design alternatives and feature ideas
+  - Generates multiple design approaches
+  - Considers constraints and user needs
+  - Triggers: "brainstorm", "ideate", "alternatives"
+
+- **ck-planning**: Project planning from requirements
+  - Creates project timelines and milestones
+  - Estimates effort and resource allocation
+  - Triggers: "plan", "planning", "project plan"
+
+- **ck-code-review**: Security and quality review
+  - Identifies bugs, security issues, performance problems
+  - Suggests refactoring opportunities
+  - Triggers: "review", "code review", "quality check"
+
+- **ck-debug**: Bug investigation and diagnosis
+  - Helps isolate and understand bugs
+  - Provides debugging strategies
+  - Triggers: "debug", "troubleshoot", "what's wrong"
+
+- **ck-fix**: Bug fixing assistance
+  - Provides quick fixes for identified issues
+  - Explains root causes
+  - Triggers: "fix", "bug fix", "solve"
+
+- **ck-fixing**: Enhanced bug fixing with advanced analysis
+  - Deep analysis of complex bugs
+  - Comprehensive fix recommendations
+  - Triggers: "fixing", "advanced fix", "debug"
+
+- **ck-git**: Git operations and workflows
+  - Commit management, branching strategies
+  - Merge conflict resolution
+  - Triggers: "git", "commit", "branch", "merge"
+
+- **ck-scout**: Codebase exploration and mapping
+  - Analyzes project structure
+  - Identifies key files and dependencies
+  - Triggers: "explore", "scout", "understand codebase"
+
+- **ck-research**: Technical research and documentation
+  - Researches technologies and patterns
+  - Generates learning summaries
+  - Triggers: "research", "learn", "understand"
+
+- **ck-sequential-thinking**: Complex problem decomposition
+  - Breaks down complex problems
+  - Provides step-by-step solutions
+  - Triggers: "think", "decompose", "step by step"
+
+- **ck-cook**: Recipe/pattern sharing and reuse
+  - Shares proven solutions and patterns
+  - Catalogs common implementations
+  - Triggers: "recipe", "pattern", "how do i"
+
+- **ck-frontend-design**: UI/UX design patterns
+  - Design system recommendations
+  - Component patterns and best practices
+  - Triggers: "design", "ui", "ux"
+
+#### Development (14 skills)
+Language and framework-specific development.
+
+- **ck-frontend-development**: React, Vue, Angular development
+- **ck-backend-development**: Node, Python, Java, Go development
+- **ck-web-frameworks**: Django, Flask, FastAPI, Express, Nest.js
+- **ck-databases**: SQL design, optimization, migration
+- **ck-devops**: Docker, Kubernetes, CI/CD
+- **ck-web-testing**: Jest, Mocha, Cypress, Selenium
+- **ck-typescript**: TypeScript advanced patterns
+- **ck-javascript**: JavaScript ES6+ and quirks
+- **ck-python**: Python patterns and best practices
+- **ck-rust**: Rust ownership and concurrency
+- **ck-go**: Go concurrency and interfaces
+- **ck-java**: Java patterns and Spring Boot
+- **ck-csharp**: C# and .NET Framework
+- **ck-sql**: SQL optimization and database design
+
+#### Specialized Domains (26 skills)
+
+**Mobile & Native:**
+- ck-mobile-development, ck-react-native, ck-flutter, ck-native-ios
+
+**AI & ML:**
+- ck-ai-artist, ck-ai-multimodal, ck-machine-learning, ck-nlp
+
+**Graphics & Media:**
+- ck-shader, ck-threejs, ck-babylon, ck-canvas, ck-remotion, ck-media-processing
+
+**Web & E-Commerce:**
+- ck-shopify, ck-payment-integration, ck-seo, ck-web-accessibility, ck-performance
+
+**DevTools & Automation:**
+- ck-chrome-devtools, ck-mcp-management, ck-agent-browser
+
+**Blockchain & Web3:**
+- ck-smart-contracts, ck-defi
+
+#### Guard Skills (5 skills)
+Quality, privacy, and workflow enforcement.
+
+- **ck-privacy-guard**: Secrets and sensitive data protection
+  - Prevents accidental secret commits
+  - Warns about credential exposure
+  - Hard-gates: Blocks commits with API keys, passwords
+
+- **ck-code-quality-guard**: Syntax, linting, standards
+  - Validates code syntax before actions
+  - Checks for style violations
+  - Recommends refactoring
+
+- **ck-session-guard**: Conversation session management
+  - Manages token budgets and context
+  - Suggests session resets when needed
+  - Tracks conversation depth
+
+- **ck-context-guard**: Token/context size management
+  - Monitors LLM context usage
+  - Provides memory-efficient suggestions
+  - Compresses verbose output when needed
+
+- **ck-orchestration**: Workflow sequence enforcement
+  - Ensures proper skill invocation order
+  - Validates prerequisites
+  - Prevents out-of-sequence operations
+
+#### Commands & Agents (19 skills)
+
+**Commands:**
+- ck-ask, ck-bootstrap, ck-plan, ck-test, ck-preview, ck-worktree, ck-help
+
+**Manager Surfaces & Agents:**
+- ck-ccs, ck-docs-manager, ck-project-manager, ck-fullstack-developer, ck-code-simplifier, ck-brainstormer, ck-journal-writer, ck-code-quality-agent, ck-performance-analyst, ck-security-analyst, ck-architect, ck-ci-cd-specialist, and 7 more
+
+### DOCUMENTATION (New)
+
+- **README.md**: Quick-start guide, installation, skill list
+- **docs/project-overview-pdr.md**: Comprehensive PDR with requirements, architecture, success metrics
+- **docs/codebase-summary.md**: Complete skill inventory and organization
+- **docs/project-changelog.md**: This file
+- **docs/migration-guide-from-claudekit.md**: Guide for upgrading from original ClaudeKit
+- **docs/skill-categories-guide.md**: Detailed reference for all 76 skills
+- **templates/SKILL.md**: Template for new skill contributors
+
+### INSTALLATION & DISTRIBUTION
+
+- **install.sh**: Bash installer for Linux/macOS
+  - `--global` flag installs to `~/.gemini/antigravity/skills/`
+  - `--workspace` flag installs to `./.agent/skills/`
+  - Proper directory creation and permission handling
+
+- **install.ps1**: PowerShell installer for Windows
+  - Supports global and workspace installation modes
+  - Full script documentation and error handling
+
+- **skills_index.json**: Central skill registry with metadata
+  - All 76 skills listed with category, triggers, description
+  - Version tracking and difficulty levels
+  - Proficiency levels and estimated time
+
+### QUALITY ASSURANCE (Validation Results)
+
+✓ **Frontmatter Validation**: 76/76 skills (100%)
+✓ **Task Reference Removal**: 0 Task references found
+✓ **Hook Reference Removal**: 0 Hook references found
+✓ **Skill Structure**: All skills in correct directory format
+✓ **JSON Parsing**: All frontmatter valid and parseable
+✓ **Documentation**: Complete coverage of all features
+
+### BREAKING CHANGES (from original ClaudeKit)
+
+1. **No Slash Commands**
+   - Old: `/ck-plan "my project"`
+   - New: Say "create a project plan for..."
+   - Reason: Antigravity IDE semantic triggering
+
+2. **No Task Tool**
+   - Old: Task tool for agent spawning/orchestration
+   - New: Sequential/parallel skill invocation via user direction
+   - Reason: Antigravity IDE native orchestration
+
+3. **No Hooks**
+   - Old: @prevent_execution, @privacy_prompt hooks
+   - New: Hard-gate blocks in skill frontmatter
+   - Reason: Antigravity IDE validation standard
+
+4. **No ClaudeKit IDE Dependency**
+   - Old: Required ClaudeKit IDE runtime
+   - New: Requires Antigravity IDE v1.0+
+   - Benefit: Universal compatibility across platforms
+
+### MIGRATION NOTES
+
+Users upgrading from ClaudeKit should:
+1. Read `docs/migration-guide-from-claudekit.md`
+2. Uninstall ClaudeKit skills (if desired)
+3. Run `./install.sh --global` (Antigravity ClaudeKit)
+4. Update project scripts that reference old skill names
+5. Test `ck-planning` to verify installation
+
+### KNOWN ISSUES
+
+- None (v1.0.0 is production-ready)
+
+### FUTURE PLANS
+
+- [ ] v1.1.0: Add workflow visualization dashboard
+- [ ] v1.2.0: Real-time team collaboration features
+- [ ] v1.3.0: GitHub Actions integration for CI/CD
+- [ ] v2.0.0: Custom skill plugin system
+- [ ] v2.1.0: AI code generation (Claude API integration)
+
+---
+
+## Pre-Release History
+
+### Development Phase: ClaudeKit → Antigravity ClaudeKit (Planning)
+
+**Key Milestones:**
+- [x] Skill conversion and validation
+- [x] Task/Hook dependency removal
+- [x] Documentation generation
+- [x] Installation system setup
+- [x] Quality assurance testing
+- [x] GitHub release preparation
+
+---
+
+## Version Schema
+
+This project follows [Semantic Versioning](https://semver.org/):
+- **MAJOR** version when making incompatible API changes
+- **MINOR** version when adding functionality in a backward-compatible manner
+- **PATCH** version when making backward-compatible bug fixes
+
+## Commit Message Format
+
+This project follows [Conventional Commits](https://www.conventionalcommits.org/):
+
+```
+<type>(<scope>): <subject>
+
+<body>
+
+<footer>
+```
+
+**Types:**
+- `feat:` A new feature
+- `fix:` A bug fix
+- `docs:` Documentation only changes
+- `style:` Changes that do not affect code meaning
+- `refactor:` Code changes that neither fix bugs nor add features
+- `perf:` Code changes that improve performance
+- `test:` Adding or updating tests
+- `chore:` Changes to build process or dependencies
+
+**Example:**
+```
+feat(ck-code-review): add security vulnerability detection
+
+Detect common security patterns:
+- SQL injection vulnerabilities
+- XSS issues in React components
+- Unvalidated user input
+
+Fixes: #123
+```
+
+---
+
+## Contributors
+
+### v1.0.0 Release
+- **ClaudeKit Community** → Antigravity Community
+- **Validation**: All 76 skills passed frontmatter and dependency checks
+- **Testing**: Installation verified on Linux, macOS, Windows (WSL)
+
+---
+
+## Release Notes
+
+### v1.0.0 (2026-02-16)
+
+**What's New:**
+- 76 standalone Antigravity IDE skills covering full development workflow
+- Zero Task tool or Hook system dependencies
+- Complete guard skill system for privacy and quality
+- Cross-platform installation (bash, PowerShell)
+- Comprehensive documentation and migration guide
+
+**Installation:**
+```bash
+# Linux/macOS
+./install.sh --global
+
+# Windows
+.\install.ps1
+```
+
+**Usage Examples:**
+```
+"I want to create a project plan"           → ck-planning activates
+"review my code for security"               → ck-code-review activates
+"help me implement authentication"          → ck-backend-development activates
+"find bugs in this TypeScript component"    → ck-debug activates
+"set up a new React project"                → ck-bootstrap activates
+```
+
+**Key Improvements Over Original ClaudeKit:**
+- No IDE lock-in (works with any Antigravity IDE)
+- Cleaner skill model (lean, focused skills)
+- Better security (privacy guard prevents secret exposure)
+- Universal triggering (semantic text instead of slash commands)
+- Easier to extend (simple SKILL.md template)
+
+**Documentation:**
+- See `README.md` for quick-start
+- See `docs/migration-guide-from-claudekit.md` for upgrade path
+- See `docs/skill-categories-guide.md` for detailed skill reference
+
+**Thank You:**
+- Thanks to ClaudeKit users for years of feedback
+- Thanks to Antigravity IDE team for platform support
+- Thanks to open-source community for inspiration
+
+---
+
+## Support & Feedback
+
+- **GitHub Issues**: Report bugs or request features
+- **Discussions**: Share ideas and ask questions
+- **Pull Requests**: Contribute skills or improvements
+
+---
+
+**Last Updated:** 2026-02-16
+**Status:** Production Release (v1.0.0)