git clone https://github.com/luckynee/unity-prefab-parser-mcp.git
cd unity-prefab-parser-mcp
npm install && npm run build

1. init_unity_project   — scan .meta files, build GUID cache (once per project)
2. browse_unity_project — navigate folder tree to find the right subfolder
3. list_unity_assets    — list assets in that folder (filter by type or name)
4. parse_unity_file     — parse with preset: "compact" for token-efficient output

Initialize my Unity project at /path/to/MyGame, then show me all enemy prefabs.

{
  "projectPath": "/path/to/MyUnityProject",
  "force": false
}

{
  "projectPath": "/path/to/MyUnityProject",
  "subPath": "Assets/Enemies",
  "depth": 2
}

Assets/
├── Enemies/          (12 prefabs)
├── UI/               (8 prefabs, 3 assets)
│   ├── HUD/          (4 prefabs)
│   └── Menus/        (4 prefabs)
├── Levels/           (5 scenes)
└── ScriptableObjects/ (23 assets)

{
  "directory": "/path/to/MyUnityProject/Assets/Enemies",
  "type": "prefab",
  "search": "bat",
  "recursive": true,
  "limit": 50
}

{
  "filePath": "/path/to/MyUnityProject/Assets/Enemies/BatPF.prefab",
  "config": {
    "preset": "compact"
  }
}

{ "preset": "compact", "includeDefaultValues": true }

{
  "mcpServers": {
    "unity-prefab-parser": {
      "command": "node",
      "args": ["/path/to/unity-prefab-parser-mcp/dist/index.js"]
    }
  }
}

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "unity-parser": {
      "type": "local",
      "command": ["node", "/path/to/unity-prefab-parser-mcp/dist/index.js"],
      "enabled": true
    }
  }
}

# Copy all three Unity skills
cp -r /path/to/unity-prefab-parser-mcp/skills/unity-asset-workflow ~/.config/opencode/skills/
cp -r /path/to/unity-prefab-parser-mcp/skills/unity-diff-workflow ~/.config/opencode/skills/
cp -r /path/to/unity-prefab-parser-mcp/skills/unity-scene-workflow ~/.config/opencode/skills/

# Copy all Unity slash commands
cp /path/to/unity-prefab-parser-mcp/commands/*.md ~/.config/opencode/commands/

{
  "mcpServers": {
    "unity-prefab-parser": {
      "command": "node",
      "args": ["/path/to/unity-prefab-parser-mcp/dist/index.js"]
    }
  }
}

{
  "unity-prefab-parser": {
    "command": "node",
    "args": ["/path/to/unity-prefab-parser-mcp/dist/index.js"]
  }
}

prefab_name: BatPF

hierarchy: |
  BatPF (t: Player, l: Layer28)
  ├── Geometry
  └── Data

components:
  BatPF:
    Transform:
      lPos: (27.13, -6.38, 0)
    Rigidbody2D:
      mass: 3
      linearDrag: 5
      angularDrag: 6
      gravity: 0
      bodyType: 0
      sleepingMode: 1
    CircleCollider2D: {trigger: true, radius: 0.5}
  Data:
    EntityData:
      _entityName: Bat
      _walkSpeed: 1.5
      _attack: 10
      _defense: 2
      _isAlive: true

prefab_name: Buck
variant_of: Buck Base

hierarchy: |
  Buck Base  # $
  ├── AI  # $
  ├── Hitable Geometry  # $
  └── Unknown  # $

components:
  Buck Base:
    Transform:  # $
      lPos: (-42.633396, -215.17801, 0)  # $
    GameObject:  # $
      name: Buck  # $
    Seeker:  # $
      tagPenalties.array.data: 10000  # $
  AI:
    AIBrain:  # $
      states.array.size: 7  # $
      states.array.data.stateName: Exit Scene  # $
      states.array.data.transitions.array.array.data.trueState: Flee  # $
  Hitable Geometry:
    GameObject:  # $
      layer: 20  # $
  Unknown:
    AggressiveAnimalData:  # $
      _defense: 3  # $
    Animator:  # $
      ctrl: Buck Anim Controller  # $

unity-prefab-parser-mcp/
├── src/
│   ├── index.ts        # MCP server, all tool definitions
│   ├── parser.ts       # Unity YAML parsing
│   ├── resolver.ts     # Reference and value resolution
│   ├── components.ts   # Component field filters and renames
│   ├── hierarchy.ts    # GameObject tree builder
│   ├── formatter.ts    # YAML output formatter
│   ├── config.ts       # Configuration and presets
│   ├── cache.ts        # Meta file GUID cache
│   └── variant.ts      # Prefab variant detection
├── skills/
│   ├── unity-asset-workflow/
│   │   └── SKILL.md    # General workflow (init, browse, list, parse)
│   ├── unity-diff-workflow/
│   │   └── SKILL.md    # Compare prefabs, variants, scenes
│   └── unity-scene-workflow/
│       └── SKILL.md    # Navigate large scenes token-efficiently
├── commands/
│   ├── unity-init.md   # /unity-init [path]
│   ├── unity-browse.md # /unity-browse [path]
│   ├── unity-list.md   # /unity-list [path] [type] [search]
│   ├── unity-parse.md  # /unity-parse [path]
│   ├── unity-diff.md   # /unity-diff [pathA] [pathB]
│   └── unity-scene.md  # /unity-scene [path]
├── test/
│   └── parser.test.ts  # Test suite (103 tests)
├── AGENTS.md           # Auto-read by Codex and Claude Code
├── .github/
│   └── copilot-instructions.md  # Auto-read by GitHub Copilot
├── package.json
└── tsconfig.json

npm install       # install dependencies
npm run build     # compile TypeScript
npm test          # run test suite (103 tests)
npm run dev       # run with tsx (no build needed)