Worked on enhancing diagnostics and observability for Azure Cosmos DB within the Azure/azure-sdk-for-go repository, focusing on backend and API development using Go. Developed diagnostic string support to provide richer error tracking and performance insights, including detailed output such as regions contacted and request metrics. Improved the formatting and maintainability of diagnostics, aligning with repository standards for trace end times and error compatibility. Expanded automated test coverage to ensure reliability and stability of the new features, supporting continuous integration workflows. Updated documentation and changelogs to reflect these changes, contributing to a more robust and developer-friendly diagnostics experience for Cosmos DB operations.