Minsoo Kim developed robust cross-platform extended attribute (xattr) support for container images, focusing on FreeBSD integration within the containers/container-libs and containers/storage repositories. Using Go and system programming techniques, Minsoo implemented FreeBSD-specific xattr wrappers and syscalls, ensuring correct get, set, and list operations during image layer unpacking. The work included careful code refactoring and harmonization of error handling across Linux, macOS, and FreeBSD, addressing platform-specific discrepancies and improving reliability. By aligning error codes and removing unreachable paths, Minsoo reduced maintenance overhead and enabled smoother cross-platform deployments, demonstrating a strong grasp of file system operations and cross-platform development challenges.