Loophole is an innovative Ableton Extension SDK-based MCP server that allows large language models (LLMs) like Claude to interact with and control Ableton Live. Unlike previous solutions that relied on external scripts or Max for Live, Loophole runs entirely inside Live's Extension Host, offering a unified `.ablx` installation and a robust, typed Node.js API. It features a deterministic command layer ensuring safe, testable operations, with every write wrapped to equal a single Live undo step, making AI-driven music production both powerful and reliable.