During April 2025, Yamao focused on stabilizing the Server-Sent Events (SSE) server startup process for the firecrawl/firecrawl-mcp-server repository. Working with TypeScript, Node.js, and Express.js, Yamao addressed a critical reliability issue by implementing a missing app.listen call, ensuring the server could properly initialize in SSE mode. The solution included robust port configuration, defaulting to 3000 with support for environment overrides, and introduced startup logs to enhance observability and troubleshooting. This backend development work improved the uptime and reliability of SSE endpoints, reduced diagnosis time for startup issues, and provided a smoother real-time experience for connected clients.