Worked on the TanStack/router repository to improve reliability and developer experience by addressing a specific issue with FormData POST handling in server function examples. Applied TypeScript and server-side development skills to correct the data submission process, ensuring more accurate validation and robust error handling. Updated the documentation to reflect these changes, providing clearer guidance for API consumers and reducing the likelihood of runtime errors. Focused on targeted, minimal changes to maintain high code quality while enhancing the correctness of server function usage. The work emphasized careful documentation and precise bug fixing, contributing to a more dependable developer workflow and user experience.