rest-api-expert

• [Introduction](#-introduction)
• [Supported IDEs](#-supported-ides)
• [Installation](#-installation)
• [Skills](#-skills)
• [Rules](#-rules)
• [Usage](#-usage)
• [Credits](#-credits)
• [Contributing](#-contributing)

---

Antigravity Kit is a comprehensive collection of:

• Skills - Domain-specific expertise (React, Node.js, Database, Testing, UI/UX...)
• Rules - Guidelines and constraints for agent behavior
• Modes - Task-specific workflows (Build, Debug, Optimize, Review...)

This toolkit combines the best of:

• [UI UX Pro Max](https://ui-ux-pro-max-skill.nextlevelbuilder.io/) - Design Intelligence with 50 styles, 21 palettes, 50 font pairings
• [ClaudeKit](https://claudekit.cc/) - Production-ready AI subagents, workflows, and integrations

---

| IDE | Folder | Features |

|-----|--------|----------|

| OpenCode | .opencode/ + AGENTS.md | Skills loaded on-demand, minimal context (~2500 tokens) |

| Antigravity | .agent/ | Full rules with activation types, workflows |

Both IDEs share the same skills and capabilities, optimized for each platform's architecture.

---

Using CLI (Recommended)

```bash

# Navigate to your project

cd your-project

# Install for both IDEs (recommended)

npx @duck4nh/antigravity-kit init

# Or specify target IDE

npx @duck4nh/antigravity-kit init --ide opencode

npx @duck4nh/antigravity-kit init --ide antigravity

npx @duck4nh/antigravity-kit init --ide both

```

CLI Commands

| Command | Description |

|---------|-------------|

| npx @duck4nh/antigravity-kit init | Install into current directory |

| npx @duck4nh/antigravity-kit update | Update to the latest version |

| npx @duck4nh/antigravity-kit status | Check installation status |

CLI Options

| Option | Description |

|--------|-------------|

| -i, --ide | Target IDE: antigravity, opencode, or both |

| -f, --force | Overwrite existing installation |

| -p, --path

Skills are domain-specific expertise modules loaded on-demand by the agent.

Frontend

| Skill | Description |

|-------|-------------|

| react-expert | React 18/19, hooks, patterns, performance |

| nextjs-expert | App Router, Server Components, SSR |

| css-expert | CSS architecture, responsive, design systems |

| state-management-expert | Redux, Zustand, React Query |

| ui-ux-pro-max | 50 styles, 21 palettes, 50 font pairings |

| accessibility-expert | WCAG compliance, a11y testing |

Backend

| Skill | Description |

|-------|-------------|

| nodejs-expert | Async patterns, modules, performance |

| nestjs-expert | Module architecture, DI, testing |

| rest-api-expert | RESTful design, HTTP semantics |

| auth-expert | JWT, OAuth 2.0, RBAC, security |

Database

| Skill | Description |

|-------|-------------|

| prisma-expert | Schema design, migrations, queries |

| database-expert | General database optimization |

| postgres-expert | PostgreSQL-specific patterns |

| mongodb-expert | MongoDB document modeling |

Testing

| Skill | Description |

|-------|-------------|

| testing-expert | General testing strategies |

| jest-expert | Jest framework, mocking |

| vitest-expert | Vitest, Vite integration |

| playwright-expert | E2E testing, browser automation |

DevOps & Tools

| Skill | Description |

|-------|-------------|

| devops-expert | CI/CD, infrastructure |

| docker-expert | Containerization, Compose |

| github-actions-expert | GitHub Actions workflows |

| git-expert | Git workflows, conflicts |

| typescript-expert | TypeScript patterns, type system |

Workflow Modes

| Skill | Description |

|-------|-------------|

| mode-consulting | Compare options, make recommendations |

| mode-build | Create features, components, modules |

| mode-debug | Fix bugs, analyze root cause |

| mode-optimize | Refactor, improve performance |

| mode-learn | Explain concepts, code, architecture |

| mode-review | Code review, security audit |

| mode-migrate | Version upgrades, stack migrations |

---

Rules are guidelines that direct agent behavior (Antigravity only).

Activation Types

| Type | Description |

|------|-------------|

| always_on | Always applied |

| model_decision | Agent decides when to apply |

Rules List

| File | Activation | Description |

|------|------------|-------------|

| 01-identity.md | Always On | Role & working principles |

| 02-task-classification.md | Always On | Task types classification |

| 03-mode-consulting.md | Model Decision | Consulting process |

| 04-mode-build.md | Model Decision | Build process |

| 05-mode-debug.md | Model Decision | Debug process |

| 06-mode-optimize.md | Model Decision | Optimization process |

| 07-mode-learn.md | Model Decision | Learning/explaining process |

| 08-mode-review.md | Model Decision | Code review process |

| 09-mode-migrate.md | Model Decision | Migration process |

| 10-technical-standards.md | Always On | Coding standards |

| 11-communication.md | Always On | Communication style |

| 12-checklist.md | Always On | Pre-delivery checklist |

| 13-special-situations.md | Always On | Edge case handling |

---

OpenCode

Skills are automatically loaded when the agent identifies a related task:

```

User: "Fix bug in this React component"

Agent: (loads react-expert skill on-demand)

```

Tips:

• Press Tab to switch between Build and Plan modes
• AGENTS.md contains core rules (~2500 tokens for minimal context)
• Skills loaded on-demand to save context

Antigravity

Rules apply based on activation type:

• always_on: Always active
• model_decision: Agent decides when to apply

Skills are available in .agent/skills/ and loaded automatically.

---

```

your-project/

├── .opencode/ # OpenCode configuration

│ ├── opencode.json # Config file

│ └── skill/ # 42+ skills

│ ├── react-expert/

│ ├── typescript-expert/

│ └── ...

├── .agent/ # Antigravity configuration

│ ├── rules/ # 13 rule files

│ ├── skills/ # 35+ skills

│ └── workflows/ # Workflow definitions

├── shared/ # Shared resources

│ └── ui-ux-pro-max/ # UI/UX design data

│ ├── data/ # CSV databases

│ └── scripts/ # Search scripts

└── AGENTS.md # Core rules for OpenCode

```

---

This project is built upon and inspired by:

| Project | Description | Link |

|---------|-------------|------|

| UI UX Pro Max | Design Intelligence - 50 styles, 21 palettes, 50 font pairings | [ui-ux-pro-max-skill.nextlevelbuilder.io](https://ui-ux-pro-max-skill.nextlevelbuilder.io/) |

| ClaudeKit | Production-ready AI subagents and workflows | [claudekit.cc](https://claudekit.cc/) |

---

Adding a New Skill

1. Create folder in both locations:

- .opencode/skill/your-skill/SKILL.md

- .agent/skills/your-skill/SKILL.md

1. Use correct frontmatter:

OpenCode format:

```markdown

---

name: your-skill

description: >-

Skill description (max 1024 chars). Explain when to use this skill.

license: MIT

compatibility: opencode

metadata:

category: frontend

---

# Your Skill

Instructions for the agent...

```

Antigravity format:

```markdown

---

name: your-skill

description: Skill descr