Worked on backend enhancements and documentation improvements across sgl-project/mini-sglang and ping1jing2/sglang over a two-month period. Delivered a user-initiated request cancellation feature for mini-sglang, enabling users to abort long-running operations by updating message handling and scheduling logic. Refactored cancellation flow by centralizing stream management within the FrontendManager, improving resource cleanup and maintainability. Later, focused on clarifying profiling endpoint documentation for sglang, detailing output directory handling and endpoint usage to streamline developer onboarding. Utilized Python, asynchronous programming, and Markdown documentation to address user experience and developer support, with work emphasizing maintainable architecture and clear technical communication.