Worked on enhancing pull request merge diagnostics within the dotnet/arcade-services repository by developing a dedicated exception, PullRequestNotMergeableException, to capture and log detailed reasons for merge failures. Focused on improving the automated merge process, the work involved implementing targeted error handling and logging in C#, with an emphasis on API integration to support internal diagnostics. These changes increased observability and maintainability of the merge pipeline, enabling faster triage and reducing time to resolution for contributors. The approach provided more reliable feedback during CI/CD workflows, supporting smoother collaboration and reducing disruptions caused by unclear or unlogged merge errors.