Sunil Mayya developed a keep-alive mechanism for WebTransport streams in the mozilla/neqo repository, focusing on enhancing connection reliability during periods of low activity. He implemented periodic PING frames using Rust to maintain active streams, updating the connection logic to invoke stream_keep_alive whenever a new stream was established. This approach proactively addressed the issue of premature stream closures due to inactivity, reducing user-facing disruptions. Sunil also created a dedicated test case to validate the new keep-alive behavior, ensuring robust protocol implementation. His work demonstrated depth in networking and protocol design, delivering a targeted feature that improved WebTransport stream stability.