Worked on the uutils/coreutils repository to enhance the safety and reliability of the rm command, focusing on cross-device operations. Developed and integrated the --one-file-system option to ensure recursive removal skips directories on different devices, providing clear diagnostics and appropriate exit codes when device boundaries are encountered. Added the --preserve-root=all feature to prevent accidental recursive deletions across device boundaries, further strengthening safeguards. Refactored device type handling to improve cross-platform compatibility and code readability by eliminating unnecessary casts and reusing computed device information. Utilized Rust for system programming and command line utility development, emphasizing maintainability and alignment with GNU coreutils behavior.