Antoine Mathie developed API key authentication for the LMStudio AI provider in the zed-industries/zed repository, focusing on secure remote node access and scalable deployments. He implemented UI components and updated state management in Rust to support API key workflows, allowing users to configure authentication directly through the interface. His work included validating the integration on a local headless LMStudio node and producing clear release notes and a demo video for the new feature. By enabling API key-based access, Antoine improved the security posture and developer experience, demonstrating depth in full stack and UI development within a short, focused project period.