CLI Development

Patterns and best practices for building command-line interfaces using Commander.js, with focus on argument parsing, user experience, and output formatting.

When to use this skill

Use this skill when:

• Creating new CLI commands or subcommands
• Adding options, arguments, or flags to commands
• Parsing and validating user input
• Formatting CLI output (spinners, colors, tables)
• Handling errors and exit codes
• Writing help text and usage documentation

Commander.js Command Patterns

Basic Command Structure