Worked on the marimo-team/marimo repository to enhance the command-line interface by standardizing the default response character in prompts from 'n' to 'N' for actions such as accepting terms and confirming user intent. This change, implemented in Python, focused on improving user experience design by making prompt defaults more visible and reducing the likelihood of incorrect submissions. The update involved careful CLI development and prompt handling to ensure consistency across the module. By refining the user flow and clarifying default actions, the work contributed to cleaner interactions and has the potential to lower support costs associated with user confusion in CLI environments.