Worked on enhancing user-agent handling in the moby/moby repository, focusing on improving reliability, security, and ASCII compatibility for backend systems. Used Go to implement robust string escaping, removed unnecessary nil-checks, and ensured graceful handling of non-string values. The approach enforced ASCII-only headers, filtered out control characters, and prevented malformed headers from affecting downstream systems or leaking into logs. These changes strengthened client-server communication and improved interoperability with other services. Demonstrated backend development expertise by prioritizing input sanitization, efficient string processing, and clear commit practices, resulting in a more secure and reliable user-agent processing pipeline within the codebase.