In May 2025, Greg Cooke developed an experimental ALTS handshaker keepalive mechanism for the grpc/grpc-java repository, focusing on enhancing connection reliability for secure communications. He implemented a toggleable feature flag that enables keepalive parameters, allowing periodic pings on the ALTS handshaker service channel to prevent premature connection closure. This approach supports safer feature rollouts by providing explicit control over the mechanism’s activation. Working primarily in Java and leveraging network programming and gRPC expertise, Greg aligned his changes with repository standards and documentation, ensuring maintainability and facilitating future reviews. His work addressed production reliability for ALTS handshake service connections.