Developed and delivered the Container Process Group Signaling feature for the google/gvisor repository, focusing on enhancing process management within containerized environments. This work extended the runsc kill command to support PGID-based signaling, allowing signals to be sent to all processes within a specified process group. By implementing this feature in Go and leveraging system programming and container management expertise, the developer improved the reliability and scalability of container operations. The update simplified the management of complex workloads by enabling more granular control over process groups, addressing operational challenges in large-scale deployments without introducing new bugs during the development period.