Worked on stabilizing the Mojo command line interface in the modular/modular repository, focusing on improving developer usability and reliability. Addressed a bug in the mojo debug subcommand by implementing stricter error handling, specifically rejecting unknown options that appear between the debug command and the target. This approach prevents user confusion and misconfiguration, ensuring only valid options are processed during debugging workflows. Updated the Markdown-based documentation to clearly reflect the new behavior and edge-case handling. The work leveraged skills in command line interface design, documentation, and error handling, contributing to safer and more predictable CLI usage across different development environments.