CLI Tool Development Project Structure Commander.js Setup User Feedback with Chalk & Ora Interactive Prompts with Enquirer Ink for Rich TUI Configuration Management Error Handling Package.json Setup Best Practices 1. Add shebang to entry file 2. Support both flags ( ) and options ( ) 3. Provide helpful error messages with suggestions 4. Support and flags 5. Use exit codes: 0 for success, 1 for error 6. Support piping and stdin when appropriate 7. Respect environment variable ---