Skill

Unity Plugin Skill

Control Unity Editor through ~100 built-in tools. Works in both Editor and Play mode.

Safety and permissions

What this skill can change: anything the Unity Editor can — GameObjects and components, scenes, prefabs, materials, shaders, textures and ScriptableObjects, files under Assets/, installed packages, Play mode, and arbitrary C# run inside the Editor process (script.execute, plus reflection-based calls).

What runs without asking: read-only tools only — get*, list, find, script.read, debug.hierarchy, debug.screenshot, console.getLogs. Their behaviour is unchanged.

What is gated at runtime: every project-changing tool — create, delete, destroy, save, set*, component.add/remove, asset.* writes, prefab.*, material.*, texture.*, editor.refresh/recompile, Play-mode control, input simulation, test.run, script.execute — and any batch.execute that carries one of them. The gateway extension refuses these by default. A tool name it does not recognise (project-registered custom tools included) counts as project-changing unless its verb is clearly read-only: the gate fails closed, never open.

How to enable them — both steps are required:

1. The operator starts the gateway with the opt-in environment variable. It is read from the gateway process, so the model cannot set it:

   OPENCLAW_EDITOR_ALLOW_DESTRUCTIVE=1 openclaw gateway restart
   # or, scoped to this skill only:
   OPENCLAW_UNITY_ALLOW_DESTRUCTIVE=1 openclaw gateway restart
   

2. The caller passes confirm: true on each project-changing call, after the user has approved that specific change:

   unity_execute: asset.delete {path: "Assets/Old/Item.prefab"}, confirm: true
   

Missing either one is a refusal with an explanation of what was blocked and how to allow it. Nothing reaches the Editor in the meantime.

Preview first: dryRun: true reports how a call is classified and what would be sent, and sends nothing:

unity_execute: gameobject.destroy {name: "Player"}, dryRun: true
→ {risk: "project-changing", requiresConfirmation: true, wouldRun: false, executed: false}

Check the current state: openclaw unity status prints whether project-changing tools are enabled, and GET /unity/status reports the same as destructiveOperations: "enabled" | "blocked".

Scope of the gate: it lives in the gateway extension that ships with this skill (extension/index.ts), so it covers every call routed through the OpenClaw gateway — Telegram, Discord and the other channels. The Unity Editor add-on's local MCP bridge (port 27182, Mode 2 below) is a separate install from the plugin repository and is not gated by this package: keep that port on the local machine and review the plugin repository for its own controls.

Connection Modes

1. OpenClaw Gateway (Remote)

For Telegram, Discord, and other OpenClaw channels:

• Auto-connects when Unity opens
• Configure in: Window → OpenClaw Plugin → Settings

2. MCP Bridge (Local)

For Claude Code, Cursor, and local AI tools:

• Start: Window → OpenClaw Plugin → MCP Bridge → Start
• Default port: 27182
• Add to Claude Code: claude mcp add unity -- node <path>/MCP~/index.js

First-Time Setup

If unity_execute tool is not available, install the gateway extension:

# From skill directory
./scripts/install-extension.sh

# Restart gateway
openclaw gateway restart

The extension files are in extension/ directory.

What install-extension.sh Does

# 1. Copies extension files from skill to gateway
#    Source: <skill>/extension/
#    Destination: ~/.openclaw/extensions/unity/

# 2. Files installed:
#    - index.ts     # Extension entry point (HTTP handlers, tools)
#    - package.json # Extension metadata

# After installation, restart gateway to load the extension.

🔐 Security: Model Invocation Setting

When publishing to ClawHub, disableModelInvocation controls who may start the skill:

Recommendation: true

Reason: this skill can execute arbitrary C# inside the Editor (script.execute) and call Editor APIs by reflection. That is the whole point of it, and it is also why it should never start on its own inference. As of v1.7.0 this skill ships with disableModelInvocation: true — it runs only on explicit user request, and every project-changing call is gated on top of that (see Safety and permissions).

The full capability disclosure — arbitrary code execution, destructive operations, network surface — is in Security & Privacy Disclosure at the end of this document. Read it before enabling the skill.

Quick Reference

Core Tools

Common Workflows

1. Scene Inspection

unity_execute: debug.hierarchy {depth: 2}
unity_execute: scene.getActive

2. Find & Modify Objects

unity_execute: gameobject.find {name: "Player"}
unity_execute: component.get {name: "Player", componentType: "Transform"}
unity_execute: transform.setPosition {name: "Player", x: 0, y: 5, z: 0}

3. UI Testing

unity_execute: input.clickUI {name: "PlayButton"}
unity_execute: input.type {text: "TestUser", elementName: "UsernameInput"}
unity_execute: debug.screenshot

4. Play Mode Control

unity_execute: editor.play              # Enter Play mode
unity_execute: editor.stop              # Exit Play mode
unity_execute: editor.getState          # Check current state
unity_execute: editor.pause             # Pause
unity_execute: editor.unpause           # Resume

5. Material Creation

unity_execute: material.create {name: "RedMetal", color: "#FF0000", metallic: 0.8}
unity_execute: material.assign {gameObjectName: "Player", materialPath: "Assets/Materials/RedMetal.mat"}
unity_execute: material.modify {path: "Assets/Materials/RedMetal.mat", metallic: 1.0, emission: "#FF4444"}

6. Prefab Workflow

unity_execute: prefab.create {gameObjectName: "Player", path: "Assets/Prefabs/Player.prefab"}
unity_execute: prefab.instantiate {prefabPath: "Assets/Prefabs/Player.prefab", x: 0, y: 1, z: 0}
unity_execute: prefab.open {path: "Assets/Prefabs/Player.prefab"}
unity_execute: prefab.save
unity_execute: prefab.close

7. Asset Management

unity_execute: asset.find {query: "Player", type: "Prefab"}
unity_execute: asset.copy {sourcePath: "Assets/Prefabs/Player.prefab", destPath: "Assets/Backup/Player.prefab"}
unity_execute: asset.move {sourcePath: "Assets/Old/Item.prefab", destPath: "Assets/New/Item.prefab"}

8. Package Management

unity_execute: package.list
unity_execute: package.search {query: "TextMeshPro"}
unity_execute: package.add {packageName: "com.unity.textmeshpro"}
unity_execute: package.add {gitUrl: "https://github.com/example/package.git"}

9. Test Running

unity_execute: test.list {testMode: "EditMode"}
unity_execute: test.run {testMode: "EditMode", filter: "PlayerTests"}
unity_execute: test.getResults

10. Script Execution (Enhanced)

script.execute is project-changing: it needs the operator opt-in and confirm: true on every call (see Safety and permissions).

# Debug logging
unity_execute: script.execute {code: "Debug.Log('Hello')"}, confirm: true

# Time manipulation
unity_execute: script.execute {code: "Time.timeScale = 0.5"}

# PlayerPrefs
unity_execute: script.execute {code: "PlayerPrefs.SetInt('score', 100)"}

# Reflection-based method calls
unity_execute: script.execute {code: "MyClass.MyMethod()"}
unity_execute: script.execute {code: "MyClass.MyStaticMethod('param1', 123)"}

Tool Categories (~100 tools)

Console (3 tools)

• console.getLogs - Get logs with optional type filter (Log/Warning/Error)
• console.getErrors - Get error/exception logs (with optional warnings)
• console.clear - Clear captured logs

Scene (7 tools)

• scene.list - List scenes in build settings
• scene.getActive - Get active scene info
• scene.getData - Get full hierarchy data
• scene.load - Load scene by name (Play mode)
• scene.open - Open scene in Editor mode
• scene.save - Save active scene (Editor mode)
• scene.saveAll - Save all open scenes (Editor mode)

GameObject (8 tools)

• gameobject.find - Find by name, tag, or component
• gameobject.getAll - Get all GameObjects with filtering
• gameobject.create - Create object or primitive (Cube, Sphere, etc.)
• gameobject.destroy - Destroy object
• gameobject.delete - Delete object (alias for destroy)
• gameobject.getData - Get detailed data
• gameobject.setActive - Enable/disable
• gameobject.setParent - Change hierarchy

Transform (6 tools)

• transform.getPosition - Get world position {x, y, z}
• transform.getRotation - Get Euler rotation {x, y, z}
• transform.getScale - Get local scale {x, y, z}
• transform.setPosition - Set world position {x, y, z}
• transform.setRotation - Set Euler rotation
• transform.setScale - Set local scale

Component (5 tools)

• component.add - Add component by type name
• component.remove - Remove component
• component.get - Get component data/properties
• component.set - Set field/property value
• component.list - List available component types

Script (3 tools)

• script.execute - Execute code: Debug.Log, Time, PlayerPrefs, reflection calls
• script.read - Read script file
• script.list - List project scripts

Application (4 tools)

• app.getState - Get play mode, FPS, time
• app.play - Enter/exit Play mode
• app.pause - Toggle pause
• app.stop - Stop Play mode

Debug (3 tools)

• debug.log - Write to console
• debug.screenshot - Capture screenshot
• debug.hierarchy - Text hierarchy view

Editor (9 tools)

• editor.refresh - Refresh AssetDatabase (triggers recompile)
• editor.recompile - Request script recompilation
• editor.domainReload - Force domain reload
• editor.focusWindow - Focus window (game/scene/console/hierarchy/project/inspector)
• editor.listWindows - List open windows
• editor.getState - Get editor state
• editor.play - Enter Play mode
• editor.stop - Exit Play mode
• editor.pause / editor.unpause - Pause control

Input Simulation (10 tools)

• input.keyPress - Press and release key
• input.keyDown / input.keyUp - Hold/release key
• input.type - Type text into field
• input.mouseMove - Move cursor
• input.mouseClick - Click at position
• input.mouseDrag - Drag operation
• input.mouseScroll - Scroll wheel
• input.getMousePosition - Get cursor position
• input.clickUI - Click UI element by name

Material (5 tools) - NEW in v1.5.0

• material.create - Create material with shader, color, metallic, smoothness
• material.assign - Assign material to GameObject
• material.modify - Modify material properties (color, metallic, emission)
• material.getInfo - Get detailed material info with all shader properties
• material.list - List materials in project with filtering

Prefab (5 tools) - NEW in v1.5.0

• prefab.create - Create prefab from scene GameObject
• prefab.instantiate - Instantiate prefab in scene with position
• prefab.open - Open prefab for editing
• prefab.close - Close prefab editing mode
• prefab.save - Save currently edited prefab

Asset (7 tools) - NEW in v1.5.0

• asset.find - Search assets by query, type, folder
• asset.copy - Copy asset to new path
• asset.move - Move/rename asset
• asset.delete - Delete asset (with trash option)
• asset.refresh - Refresh AssetDatabase
• asset.import - Import/reimport specific asset
• asset.getPath - Get asset path by name

Package Manager (4 tools) - NEW in v1.5.0

• package.add - Install package by name or git URL
• package.remove - Remove installed package
• package.list - List installed packages
• package.search - Search Unity package registry

Test Runner (3 tools) - NEW in v1.5.0

• test.run - Run EditMode/PlayMode tests with filtering
• test.list - List available tests
• test.getResults - Get last test run results

Batch Execution (1 tool) - NEW in v1.6.0

• batch.execute - Execute multiple tools in one call (10-100x performance)
  • commands: Array of {tool, params} objects
  • stopOnError: Stop on first error (default: false)

Session (1 tool) - NEW in v1.6.0

• session.getInfo - Get session info (project, processId, machineName, sessionId)

ScriptableObject (6 tools) - NEW in v1.6.0

• scriptableobject.create - Create new ScriptableObject asset
• scriptableobject.load - Load and inspect ScriptableObject fields
• scriptableobject.save - Save ScriptableObject changes
• scriptableobject.getField - Get specific field value
• scriptableobject.setField - Set field value with auto-save
• scriptableobject.list - List ScriptableObjects in project

Shader (3 tools) - NEW in v1.6.0

• shader.list - List shaders in project
• shader.getInfo - Get shader properties and info
• shader.getKeywords - Get shader keywords

Texture (5 tools) - NEW in v1.6.0

• texture.create - Create new texture with color fill
• texture.getInfo - Get texture info (size, format, import settings)
• texture.setPixels - Fill region with color
• texture.resize - Resize texture via import settings
• texture.list - List textures in project

Custom Tools API - v1.6.0

Register project-specific tools:

OpenClawCustomTools.Register(
    "mygame.getScore",
    "Get current score",
    (args) => new { success = true, score = GameManager.Score }
);

MCP Resources - v1.6.0

Access Unity data via MCP resource URIs:

Tips

Screenshot Modes

• Play mode: ScreenCapture - includes all UI overlays
• Editor mode: Camera.main.Render() - no overlay UI
• Use {method: "camera"} for camera-only capture

Finding Objects

gameobject.find {name: "Player"}           # By exact name
gameobject.find {tag: "Enemy"}             # By tag
gameobject.find {componentType: "Camera"}  # By component
gameobject.getAll {activeOnly: true}       # All active objects

Script Recompilation

Unity may not auto-recompile after code changes. Use:

editor.refresh    # Full asset refresh + recompile

Play Mode Transitions

• Plugin survives Play mode transitions via SessionState
• If connection lost, wait for auto-reconnect or use Window → OpenClaw Plugin → Settings → Connect

MCP Bridge Usage

For Claude Code / Cursor integration:

1. Start: Window → OpenClaw Plugin → MCP Bridge → Start
2. Register: claude mcp add unity -- node /path/to/MCP~/index.js
3. Verify: curl http://127.0.0.1:27182/status

Input Simulation Limitation

Keyboard/mouse simulation works for UI interactions but NOT for Input.GetKey(). For gameplay testing:

• Use transform.setPosition to move objects directly
• Or migrate to Unity's new Input System

Troubleshooting

Security & Privacy Disclosure

This skill drives a live Unity Editor — treat it like giving a collaborator editor access. Full disclosure of capabilities:

• Arbitrary code execution (by design): script.execute compiles and runs C# inside the Unity process, and several tools use reflection to reach editor internals. This is the core of editor automation — it also means the skill can do anything the editor can. Only use in trusted, version-controlled projects. Ask the user to review C# snippets before running code they didn't write.
• Destructive operations are gated at runtime (v1.7.0+): deleting GameObjects/assets, saving scenes/projects, installing packages, simulating keyboard/mouse input and running script.execute are refused by the gateway extension unless it was started with OPENCLAW_EDITOR_ALLOW_DESTRUCTIVE=1 and the call carries confirm: true. Confirm the change with the user before setting it — see Safety and permissions.
• Package installation: Git-based package installs import external, unvetted code into the project. Verify the source URL with the user first.
• Metadata: the connection handshake includes machine name and process ID (used to route messages to the right editor instance). No other host information is collected or transmitted.
• Network surface: MCP bridge listens on localhost port 27182. Keep it bound to localhost; do not expose the port beyond the local machine or a trusted network.
• Trigger scope: routine-sounding requests ("clean up the scene", "save everything", "just try it") map to state-changing editor operations — confirm once before the first state-changing call in a session.
• Safety defaults: disableModelInvocation: true is set — the model cannot auto-invoke this skill; it runs only on explicit user request. Project-changing tools default to refused, and dryRun: true previews any call without sending it. Keep project backups / source control current before automation sessions.

Links

• Skill Repository: https://github.com/TomLeeLive/openclaw-unity-skill
• Plugin Repository: https://github.com/TomLeeLive/openclaw-unity-plugin
• OpenClaw Docs: https://docs.openclaw.ai
• MCP Setup Guide: See Plugin Repository → Documentation~/SETUP_GUIDE.md

License

Apache-2.0 — See LICENSE.md