Worked on the OpenListTeam/OpenList repository, focusing on backend development and cloud storage reliability. Addressed a critical issue in the file transfer workflow by fixing a bug in AWS S3 path construction using Go. The solution involved correcting the logic that previously added an unnecessary slash before the bucket name during file copy operations, which had caused errors in accessing and copying files. By ensuring proper S3 object key formatting, the update improved the stability and reliability of storage-related features. The work demonstrated attention to detail in cloud storage integration and contributed to smoother backend operations without introducing new features.