Worked on the modelcontextprotocol/go-sdk repository to enhance the robustness of JSON-RPC 2.0 header parsing, focusing on improving client interoperability. Addressed a key compatibility issue by implementing case-insensitive parsing for the Content-Length header, ensuring reliable communication with clients that send headers in varying cases. The solution was carefully scoped to minimize risk and maintain alignment with existing protocol parsing strategies. Utilized Go for backend development and API integration, applying targeted changes that reduced header-related issues across diverse client environments. The work emphasized protocol reliability and maintainability, delivering a focused bug fix without introducing new features during the development period.