Naninovel MCP

🚀 Naninovel MCP Server

This is a Unity C# plugin that exposes Naninovel script authoring and playback controls via the Model Context Protocol (MCP), allowing AI assistants to write, edit, and test visual novel scripts.

✨ Features

• Independent of Play Mode - The server runs in the Editor at all times.
• NaniScript CRUD - Create, read, update, and delete script files.
• Direct Playback - Skip the title screen and jump to any script/label.
• Input Simulation - Advance dialogue and simulate key presses.
• Visual Verification - Capture screenshots for scene validation.

🚀 Quick Start

1. Open the Unity Editor.
2. The server starts automatically (or open Window > Nani MCP > Server Status).
3. Connect your MCP client to http://localhost:6274.

For Antigravity, add the following to your mcp_config.json:

{
  "mcpServers": {
    "nani-mcp": {
      "serverUrl": "http://localhost:6274"
    }
  }
}

💻 Available Tools

Script File Operations (Editor Mode)

Playback Controls (Play Mode)

Scene & State (Play Mode)

Input Simulation (Play Mode)

Unity Editor Controls

💻 Usage Examples

Writing a Script

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "write_script",
    "arguments": {
      "path": "events/new_scene.nani",
      "content": "; New Scene\n@back Classroom\n@char NaniChan\nNaniChan: Bonjour!"
    }
  }
}

Quick Play

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "quick_play",
    "arguments": {
      "script": "events/new_scene",
      "resetState": true
    }
  }
}

📚 Documentation

Open Window > Nani MCP > Server Status to configure:

• Port: WebSocket server port (default: 6274).
• Auto-start: Start the server automatically when the Editor opens.

📄 License

This project is licensed under the MIT License.