The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Unity MCP
AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into…
Install
npm install -g unity-mcp-cliInstall command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →✨ AI Game Developer — Unity SKILLS, MCP
Unity MCP is an AI-powered game development assistant for Editor & Runtime. Connect Claude, Cursor, & Windsurf to Unity via MCP. Automate workflows, generate code, and enable AI within your games.
Unlike other tools, this plugin works inside your compiled game, allowing for real-time AI debugging and player-AI interaction.
💬 Join our Discord Server - Ask questions, showcase your work, and connect with other developers!
- ✔️ AI agents - Use the best agents from Anthropic, OpenAI, Microsoft, or any other provider with no vendor lock-in
- ✔️ Tools - A wide range of default MCP Tools for operating in Unity Editor
- ✔️ Skills - Generate skills for AI based on operating system, Unity version, plugins in the project
- ✔️ Code and Tests - Develop game mechanics and test them with AI agents
- ✔️ Runtime (in-game) - Use LLMs directly inside your compiled game for dynamic NPC behavior or debugging
- ✔️ Debug support - Let AI debug and fix the problems in a project
- ✔️ Natural conversation - Chat with AI like you would with a human
- ✔️ Flexible deployment - Works locally (stdio) and remotely (http) via configuration
- ✔️ Extensible - Create custom Tools in your project code
https://github.com/user-attachments/assets/228baf4d-4f00-4dce-939d-fb985ebdd8dd
OR use cli
# 1. Install unity-mcp-cli
npm install -g unity-mcp-cli
# 2. Install "AI Game Developer" in Unity project
unity-mcp-cli install-plugin ./MyUnityProject
# 3. Sign in to ai-game.dev (opens your browser — OAuth device flow)
unity-mcp-cli login
# 4. Open Unity project (auto-connects and generates skills)
unity-mcp-cli open ./MyUnityProject
Quick Start
Get up and running in three steps:
Install plugin — download the
.unitypackageinstaller or runopenupm add com.ivanmurzak.unity.mcpAlternative:
npx unity-mcp-cli install-plugin ./MyUnityProject— see CLI documentationPick an AI agent — Claude Code, Claude Desktop, GitHub Copilot, Cursor, or any other
Setup AI agent — open
Window/AI Game Developerin Unity and click Auto-generate skills (recommended) or Configure MCPAlternative:
npx unity-mcp-cli setup-skills claude-code ./MyUnityProject— see CLI documentation
That's it. Ask your AI "Create 3 cubes in a circle with radius 2" and watch it happen. ✨
Skills and Tools Reference
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