During April 2025, Tomas R. focused on enhancing the reliability and clarity of the Stateless mode in the modelcontextprotocol/typescript-sdk repository. He addressed a subtle bug in the StreamableHTTPServerTransport by correcting the sessionIdGenerator behavior, ensuring that it is undefined in stateless mode and updating the TypeScript interface to match this logic. Tomas also improved the documentation to clarify correct usage, reducing the risk of misconfiguration and runtime errors for downstream clients. His work combined server-side development and TypeScript expertise, resulting in more predictable API behavior and smoother developer onboarding, though the scope was limited to a single targeted bug fix.