Worked on enhancing reliability and observability in the SagerNet/gvisor repository, focusing on the IP forwarding path. Addressed a critical bug where a panic could occur if an endpoint was closed during IPv4 or IPv6 packet forwarding by implementing robust error handling using Go. The solution involved catching tcpip.ErrClosedForSend to ensure graceful handling of closed endpoints, which reduced incident impact and downtime. Additionally, introduced a new metric to track forwarding errors, improving visibility and facilitating faster troubleshooting. The work demonstrated strong skills in network programming, system programming, and testing, contributing to a more resilient and maintainable codebase.