During January 2026, contributed to nushell/nushell by developing a new umask command that enables users to set default file and directory permissions on Unix-like systems using intuitive string formats, simplifying permission management for newly created files. The implementation was designed to be platform-aware, ensuring the command is only available where the umask syscall is supported, thus preventing runtime issues. Additionally, addressed a documentation issue in typescript-eslint/typescript-eslint by correcting a misformatted link for the no-useless-default-assignment rule. Work involved Rust programming, Unix system command integration, and technical writing, with clear release notes prepared to communicate these updates to users.