antigravity-claudekit/docs/project-overview-pdr.md

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

# 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:

{
  "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:

"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