Developed two targeted enhancements for the Automattic/harper repository, focusing on improving command-line interface workflows for TeX users. Delivered TeX processing capabilities within the CLI, enabling automated handling of TeX files and related formats to streamline document workflows. Introduced support for non-colored terminal output through a --no-color flag and NO_COLOR environment variable, addressing accessibility and usability in diverse terminal environments. Both features were implemented in Rust, with integration tests added to validate correct behavior and expand test coverage. The work was delivered through well-scoped, focused commits, laying a foundation for future CLI and TeX ecosystem improvements.