Worked on the oven-sh/bun repository to address HTTP response header reliability, focusing on backend development with C++ and TypeScript. Delivered a targeted bug fix that prevents duplicate Transfer-Encoding headers by introducing a flag-based deduplication mechanism, aligning Bun’s HTTP stack with Node.js behavior. This approach reused and extended existing patterns for Content-Length and Date headers, ensuring consistency and improved interoperability, especially for users migrating from Node.js to Bun. The solution was validated through minimal reproducible tests and cross-environment checks, enhancing HTTP protocol compliance and reducing migration friction. No new features were added during this period, with efforts concentrated on stability.