During December 2025, Frederic Lefeurmou enhanced the stacklok/toolhive repository by implementing automatic token refresh for long-running MCP sessions. He introduced the refresh_token grant type to dynamic client registration requests, enabling seamless OAuth 2.0 session management and reducing manual intervention. Working primarily in Go, Frederic also improved backend reliability by adding a health-check failure callback that updates remote MCP workload status, ensuring more accurate server health reporting. His work included cleaning up the transport layer by removing unused callbacks, resulting in a more maintainable codebase. These contributions demonstrated depth in API development, OAuth integration, and backend engineering best practices.