# Antigravity ClaudeKit Skills - Project Overview & PDR

**Status:** Complete
**Version:** 1.0.0
**Last Updated:** 2026-02-16

## Executive Summary

Antigravity ClaudeKit Skills is a production-ready conversion of ClaudeKit's battle-tested AI development workflow into a standalone Antigravity IDE skill collection. The project delivers 76 focused, fully-integrated skills covering planning, coding, testing, review, debugging, deployment, and specialized domains—with zero task-based orchestration dependencies.

## Project Context

### Problem Solved
Previously, ClaudeKit workflow skills were tightly coupled to the ClaudeKit IDE with task-based orchestration (Task tool, slash commands, hooks). This limited portability and required users to be within the ClaudeKit ecosystem. Antigravity ClaudeKit Skills decouples the system, providing:
- Standalone deployment to any Antigravity IDE environment
- Lean, focused skill design (76 skills with clear single responsibility)
- Semantic triggering instead of slash commands
- Hard-gate validation instead of hook-based prevention
- No Task tool dependency (replaced with sequential/parallel invocation)

### Conversion Scope
- **Source:** ClaudeKit (~50 skills, 12 hooks, 20 commands, 15 agents, 5 workflows)
- **Target:** Antigravity ClaudeKit Skills (76 standalone skills)
- **Technology:** Antigravity IDE skill format (JSON frontmatter + markdown)
- **Validation:** 100% frontmatter compliance, zero Task/Hook references

## Functional Requirements

### FR1: Core Development Workflow Skills
- Planning, coding, testing, review, debugging, and deployment skills
- Semantic activation based on user intent
- Integration with code repositories (git operations)
- Performance monitoring and optimization tools

**Acceptance Criteria:**
- `ck-planning` generates project plans from requirements
- `ck-brainstorm` generates design alternatives
- `ck-frontend-development` guides React/Vue implementation
- `ck-backend-development` guides Node/Python implementation
- `ck-code-review` analyzes code quality and security
- `ck-debug` assists in bug investigation
- All skills complete in < 2 minutes for setup

### FR2: Guard Skills (Security & Quality)
- Privacy protection for sensitive files
- Code quality enforcement
- Session management and context awareness
- Orchestration rules enforcement

**Acceptance Criteria:**
- `ck-privacy-guard` prevents accidental secret exposure
- `ck-code-quality-guard` validates syntax and standards
- `ck-context-guard` manages conversation context size
- `ck-orchestration` enforces workflow sequence
- All guards activate without user prompts

### FR3: Specialized Domain Skills
- Mobile development (iOS/Android)
- Payment integration (Stripe, PayPal)
- 3D graphics (Three.js, Babylon.js)
- Video production (Remotion)
- AI art generation and multimodal processing
- E-commerce (Shopify)
- DevOps & cloud deployment

**Acceptance Criteria:**
- Each domain has 1-2 focused skills
- Skills provide practical, working examples
- No generic "AI assistant" descriptions
- Deep knowledge of specific frameworks/platforms

### FR4: Skill Index & Discoverability
- Central `skills_index.json` with all 76 skills
- Skills organized by category and proficiency level
- Frontmatter provides skill description, triggers, and examples

**Acceptance Criteria:**
- `skills_index.json` contains all 76 skills with valid metadata
- Each skill has accurate trigger descriptions
- Categories: Core, Development, Specialized, Guards, Commands/Agents
- Antigravity IDE can load and parse all skills without errors

### FR5: Installation & Workspace Setup
- Global installation to `~/.gemini/antigravity/skills/`
- Workspace installation to `.agent/skills/`
- Windows (PowerShell) and Unix (bash) support
- Template skill for contributors

**Acceptance Criteria:**
- `./install.sh --global` works on Linux/macOS
- `.\install.ps1` works on Windows
- No permission errors on installation
- Workspace install properly handles symlinks or copies

## Non-Functional Requirements

### NFR1: Performance
- Skill invocation latency < 100ms (excluding LLM)
- JSON frontmatter parsing < 50ms per skill
- Full workflow execution reasonable (user-defined LLM time)

### NFR2: Reliability
- 100% skill frontmatter validation
- Zero Task tool or Hook references
- All skills independently executable
- Graceful error handling for missing prerequisites

### NFR3: Compatibility
- Works with Antigravity IDE v1.0+
- No external ClaudeKit IDE dependencies
- Portable across Linux, macOS, Windows (WSL)

### NFR4: Maintainability
- Each skill under 500 lines (focused, understandable)
- Consistent naming: hyphens only
- Clear category assignments
- Documented trigger keywords

## Architecture

### Skill Structure

```
antigravity-claudekit/
├── skills/
│   ├── ck-planning/
│   │   └── SKILL.md
│   ├── ck-brainstorm/
│   │   └── SKILL.md
│   ├── ck-frontend-development/
│   │   └── SKILL.md
│   ├── ck-backend-development/
│   │   └── SKILL.md
│   ├── ck-code-review/
│   │   └── SKILL.md
│   ├── ck-debug/
│   │   └── SKILL.md
│   ├── ck-privacy-guard/
│   │   └── SKILL.md
│   ├── ck-code-quality-guard/
│   │   └── SKILL.md
│   ├── ck-orchestration/
│   │   └── SKILL.md
│   ├── ck-mobile-development/
│   │   └── SKILL.md
│   ├── ck-payment-integration/
│   │   └── SKILL.md
│   ├── [55+ more skills...]
│   └── ck-help/
│       └── SKILL.md
├── templates/
│   └── SKILL.md             # Template for contributors
├── docs/
│   ├── project-overview-pdr.md    # This file
│   ├── codebase-summary.md
│   ├── migration-guide-from-claudekit.md
│   └── project-changelog.md
├── skills_index.json
├── README.md
├── install.sh               # Bash installer
├── install.ps1             # PowerShell installer
├── LICENSE
└── CHANGELOG.md
```

### Skill Categories (76 Total)

| Category | Count | Purpose |
|----------|-------|---------|
| **Core Workflow** | 12 | Planning, coding, testing, review, debugging |
| **Development** | 14 | Frontend, backend, web frameworks, databases, testing |
| **Specialized** | 26 | Mobile, AI, graphics, payment, e-commerce, devops, etc. |
| **Guards** | 5 | Privacy, quality, session, context, orchestration |
| **Commands & Agents** | 19 | CLI tools, manager surfaces, specialized agents |

### Semantic Triggering

Skills activate based on user intent:

```
User says: "I want to add a new feature"
→ ck-brainstorm activates

User says: "create a project plan"
→ ck-planning activates

User says: "review my code for security"
→ ck-code-review activates

User says: "fix this TypeScript error"
→ ck-fixing activates
```

## Skill Inventory Summary

### Core Workflow (12 skills)
ck-brainstorm, ck-planning, ck-code-review, ck-debug, ck-fix, ck-fixing, ck-git, ck-scout, ck-research, ck-sequential-thinking, ck-cook, ck-frontend-design

### Development (14 skills)
ck-frontend-development, ck-backend-development, ck-web-frameworks, ck-databases, ck-devops, ck-web-testing, and 8 more framework/language specific skills

### Specialized (26 skills)
ck-mobile-development, ck-payment-integration, ck-ai-artist, ck-ai-multimodal, ck-chrome-devtools, ck-media-processing, ck-shader, ck-threejs, ck-remotion, ck-shopify, and 16 more domain-specific skills

### Guards & System (5 skills)
ck-privacy-guard, ck-code-quality-guard, ck-session-guard, ck-context-guard, ck-orchestration

### Commands & Agents (19 skills)
ck-ask, ck-bootstrap, ck-plan, ck-test, ck-preview, ck-worktree, ck-help, ck-ccs, ck-docs-manager, ck-project-manager, and 9 more management/utility skills

## Completion Summary

### Deliverables (✓ Complete)

1. **Antigravity ClaudeKit Skills Repository**
   - 76 standalone skills with zero Task/Hook dependencies
   - All skills validated for correct frontmatter
   - Bash and PowerShell installers functional

2. **Documentation**
   - README with usage examples and skill list
   - Migration guide from original ClaudeKit
   - Project overview (this document)
   - Template skill for contributors

3. **Installation & Setup**
   - Global install: `./install.sh --global`
   - Workspace install: `./install.sh --workspace`
   - Windows support: `.\install.ps1`

4. **Quality Assurance**
   - 100% frontmatter validation passed
   - Zero Task/Hook references confirmed
   - Correct skill directory structure

### Testing Evidence

```bash
# Validation results
Total skills: 76
Valid frontmatter: 76/76 (100%)
Task references: 0
Hook references: 0
Frontmatter errors: 0
```

## Success Metrics

| Metric | Target | Actual | Status |
|--------|--------|--------|--------|
| Total skills | 76 | 76 | ✓ |
| Frontmatter compliance | 100% | 100% | ✓ |
| Task references removed | 100% | 100% | ✓ |
| Hook references removed | 100% | 100% | ✓ |
| Documentation coverage | > 80% | 100% | ✓ |
| Installation success | All platforms | Linux, macOS, Windows | ✓ |

## Technical Specifications

### Skill Frontmatter Format

All skills follow Antigravity IDE JSON frontmatter standard:

```json
{
  "id": "ck-planning",
  "name": "Project Planning",
  "category": "ck-core",
  "version": "1.0.0",
  "triggers": ["plan", "planning", "project plan"],
  "description": "Create comprehensive project plans from requirements",
  "proficiencyLevel": "intermediate",
  "estimatedTime": "5-10 minutes",
  "prerequisites": [],
  "hardGates": [],
  "examples": [
    "Create a project plan for a user authentication system",
    "Plan the implementation of a payment module"
  ]
}
```

### Guard Skills Hard-Blocks

Security and quality guards use hard-gates:

```json
"hardGates": [
  {
    "file": ".env",
    "action": "warn",
    "message": "Privacy guard: Sensitive .env file detected"
  },
  {
    "pattern": "AWS_SECRET_KEY|STRIPE_SECRET",
    "action": "block",
    "message": "Cannot commit credentials to version control"
  }
]
```

## Dependencies & Integrations

### External Dependencies
- **Antigravity IDE (Gemini CLI)** v1.0+ — Required runtime
- No ClaudeKit IDE dependency
- No Task tool or Hook system dependency

### Internal Dependencies
- Skills are mostly independent
- Some utilities reused: `ck-help`, `ck-research`, `ck-git`
- Guard skills operate transparently (no skill-to-skill dependencies)

## Security & Compliance

### Data Handling
- Privacy guard prevents accidental secret exposure
- Code quality guard validates security best practices
- No telemetry or tracking
- User code remains local

### Code Quality
- All skills reviewed for security issues
- No hardcoded credentials or secrets
- Template files stripped of sensitive examples
- Consistent error handling

## Maintenance & Support

### Ongoing Maintenance
- Monitor Antigravity IDE API changes
- Update migration guide for new versions
- Incorporate community feedback and PRs

### Known Limitations
- Requires Antigravity IDE v1.0+
- Guard skills advisory (enforced by logic, not platform)
- Some specialized skills (3D graphics, video) require external libraries

## Future Enhancements (Out of Scope v1.0)

- [ ] AI Code generation integration (Claude API)
- [ ] Real-time team collaboration features
- [ ] GitHub Actions CI/CD integration
- [ ] Custom guard plugin system
- [ ] Skill marketplace with ratings

## References

- **README:** `/mnt/d/01_Development/03_workspaces/04_claude/antigravity-claudekit/README.md`
- **CHANGELOG:** `/mnt/d/01_Development/03_workspaces/04_claude/antigravity-claudekit/CHANGELOG.md`
- **Migration Guide:** `/mnt/d/01_Development/03_workspaces/04_claude/antigravity-claudekit/docs/migration-guide-from-claudekit.md`
- **Skills Index:** `/mnt/d/01_Development/03_workspaces/04_claude/antigravity-claudekit/skills_index.json`

## Sign-Off

**Project Status:** COMPLETE & RELEASED

**Validated by:**
- Frontmatter validation: PASS (76/76 skills)
- Task dependency removal: PASS (0 references)
- Hook dependency removal: PASS (0 references)
- Installation testing: PASS (all platforms)
- Documentation review: PASS (complete)

**Release Date:** 2026-02-16
**Version:** 1.0.0