Worked on the cli/cli repository to deliver targeted user experience improvements and enhance test reliability for repository management workflows. Developed a feature that provides clearer guidance when no default repository is configured for the gh repo set-default command, offering users an informative explanation and a suggestion to view help resources. Addressed a bug by updating test expectations to match the actual error message when repository renaming involves a slash, ensuring test coverage accurately reflects CLI behavior. Utilized Shell scripting and testing methodologies, with a focus on Go-based CLI development, to improve messaging consistency, reduce user confusion, and streamline onboarding processes.