During April 2026, this developer enhanced the du command in the uutils/coreutils repository by implementing support for multi-occurrence command-line arguments. The update allows users to specify options such as block size and format multiple times, with the most recent value taking precedence, thereby improving flexibility for scripting and automation. The work was carried out in Rust, leveraging strong command line utility development skills and a focus on robust testing. Comprehensive test coverage was added to validate correct behavior across repeated arguments and option overrides, ensuring reliability and reducing the risk of regressions while maintaining performance and compatibility standards.