Raphael Mansuy focused on enhancing the reliability of real-time streaming in the modelcontextprotocol/go-sdk repository by addressing a bug in the StreamableClientTransport component. He implemented a targeted fix in Go to filter out non-message server-sent events, such as ping, during SSE decoding, thereby preventing invalid JSON errors that could disrupt downstream services. Raphael validated the solution against a live DeepWiki MCP server and expanded test coverage to ensure resilience against mixed event streams. His work in backend and API development emphasized robust error handling and thorough testing, resulting in improved stability for production workloads relying on message-only streams.