Worked on enhancing the reliability of WebSocket transport in the XTLS/Xray-core repository by implementing a configurable heartbeatPeriod, enabling periodic heartbeat messages for improved connection stability and early detection of dead connections. This feature was developed using Go and required careful protocol implementation and network programming to ensure robust client and server behavior. Complementing the core changes, contributed detailed documentation to XTLS/Xray-docs-next, outlining the new heartbeatPeriod option, its usage, and default behavior to assist users in configuration management. The work emphasized cross-repository consistency, aligning technical features and documentation, and demonstrated depth in both backend development and technical writing.