May 2026: Delivered a targeted enhancement to OAuth scope management in modelcontextprotocol/csharp-sdk by introducing a ScopeSelectorDelegate to filter OAuth scopes during authorization. This enables more precise, policy-driven scope calculations and reduces the risk of over-scoping in downstream services. Updated ClientOAuthOptions and ClientOAuthProvider to utilize the new delegate for scope computation, ensuring consistent behavior across clients. Added unit tests to validate the new scope filtering flow and guard against regressions. The change was implemented with a concise, low-risk commit and lays the groundwork for future policy customization with minimal code changes.

April 2026 monthly summary for dotnet/yarp: Delivered a focused feature cleanup by removing redundant service discovery registration, simplifying the YARP configuration and reducing potential misconfigurations. No major bugs reported; stability maintained. Impact: easier deployments, reduced maintenance overhead, and clearer service discovery behavior. Technologies demonstrated: .NET, YARP, configuration management, and commit-driven development.

Monthly summary for 2025-11: Implemented a reliability-focused enhancement in the C# SDK by adding Persistent OAuth Access Token Caching. This change persists access tokens beyond the HTTP transport lifetime, reducing token-related failures and improving authentication reliability for client applications using modelcontextprotocol/csharp-sdk.