Worked on stabilizing Content-Type handling in the github/github-mcp-server repository, focusing on improving JSON request processing and Go SDK compatibility. Developed a middleware in Go to normalize Content-Type headers, ensuring that requests with optional charset parameters were accepted by the backend’s strict parser. Upgraded the Go SDK to enhance media type parsing, aligning with RFC 8259 and reducing unnecessary request rejections. Once the upstream fix addressed these parsing issues, the normalization middleware was removed, simplifying the codebase and lowering maintenance overhead. This work leveraged skills in API development, backend engineering, and middleware design to streamline JSON endpoint interactions.