Worked on enhancing changefeed management user experience in the pingcap/ticdc repository by implementing Changefeed ID validation improvements. Focused on backend development using Go, the work introduced stricter validation logic to detect invalid characters, specifically underscores, in changefeed IDs. Actionable error messages were added to the API, providing users with clear guidance when invalid IDs are submitted and aligning with internal validation standards. This update addressed both internal requirements and user feedback, reducing potential support tickets and streamlining troubleshooting. The changes emphasized robust error handling and API development practices, laying the foundation for more reliable changefeed creation and management workflows.