Kevin Armand Zakka developed comprehensive documentation for new CLI tools within the menloresearch/mujoco-wasm repository, focusing on mjx-testspeed and mjx-viewer for the mujoco-mjx package. He utilized RST and documentation best practices to create clear usage guidelines and practical examples, streamlining onboarding for new developers and clarifying operational workflows. His work emphasized tool discoverability, performance tuning, and debugging visibility, addressing common pain points in MJX model development. By centralizing and versioning the documentation, Kevin improved traceability and maintenance. The depth of his contribution lies in enabling more efficient collaboration and reducing friction for both new and existing contributors.