During November 2024, Maria Hristova enhanced the pull request merge diagnostics for the dotnet/arcade-services repository by developing a dedicated exception, PullRequestNotMergeableException, in C#. This feature captures and logs detailed reasons when pull requests cannot be merged, improving the observability and maintainability of the automated merge pipeline. By focusing on robust error handling and targeted logging, Maria enabled faster triage and reduced time to resolution for merge failures. Her work leveraged API integration and advanced logging techniques to support more reliable CI/CD workflows, addressing a key pain point for contributors and maintainers in the repository’s automated processes.