Greg focused on stabilizing the session resource lifecycle in the modelcontextprotocol/servers repository, addressing issues that arose when LLM agents repeatedly invoked tools using the same resource URI. He enhanced the backend logic by implementing idempotent re-registration of session resources, ensuring that duplicate 'Resource already registered' errors were prevented. Using TypeScript and SDK integration, Greg introduced a module-level URI tracking map to detect and safely replace existing registrations, removing old resources before re-registering new content. This approach improved the reliability of automated workflows and supported retry semantics, demonstrating thoughtful backend development and careful attention to operational robustness in server tooling.