Worked on the firebase/firebase-tools repository to enhance the Firebase CLI by improving the visibility and registration of subcommands in the help output. Focused on CLI development using TypeScript, the work involved refactoring the command loader to recursively register both parent and leaf subcommands, ensuring commands like login, target, and ext are accurately displayed for users. This approach improved maintainability and set a foundation for future extensibility. Unit testing was incorporated to validate the new loader behavior and strengthen type safety, directly addressing onboarding friction and increasing reliability for developers interacting with the CLI during command discovery and execution.