Worked on enhancing the reliability of HTTP utilities within the modelcontextprotocol/typescript-sdk repository by expanding unit test coverage for key functions such as normalizeHeaders and createFetchWithInit. Focused on validating input handling and integration with fetch requests, the approach emphasized test-driven development and code quality. By aligning new tests with issue #1374, the work enabled earlier detection of edge cases and regressions in HTTP request handling. Utilizing TypeScript and JavaScript, the developer improved maintainability and reduced the risk of regressions, supporting faster iteration for downstream consumers and increasing overall developer confidence in the SDK’s HTTP utility components.