Wenyi Yu focused on backend reliability improvements for the Tencent/WeKnora repository, specifically addressing connection lifecycle issues in the MCP Client over SSE transport. Using Go and leveraging skills in network programming and error handling, Wenyi fixed a bug where the client’s connection state was not properly marked as closed after an SSE disconnect. The solution involved implementing robust error handling and enhanced warning logs to ensure invalid sessions were prevented and the client disconnected cleanly. This targeted fix improved overall system stability and reduced user-facing errors, demonstrating a thoughtful approach to backend maintenance and reliability within a short project period.