Editor-only bridge that exposes the engine’s Editor.Mcp.ToolRegistry over a local JSON-RPC HTTP server for Proton/MCP integration. It runs a loopback TcpListener, parses HTTP/1.1, handles initialize, ping, tools/list and tools/call by reflecting into the tool registry, and ships a dock, console commands, and per-user settings to start, stop, and self-test the server. There is a Linux/Wine probe via P/Invoke to detect Wine and toggle UI availability.