Commander

The definitive solution for building interactive Node.js command-line interfaces with automated help generation and robust argument parsing.

Commander is the industry standard for Node.js CLI development, powering massive projects like Vue CLI and Create React App. It streamlines interface creation by handling version signaling, subcommands (git-style), and complex option flags with minimal boilerplate. You define your requirements using a fluent API: .option('-p, --port <number>', 'port range', 8080) handles the parsing, validation, and help-text formatting automatically. It transforms raw process.argv strings into clean, actionable JavaScript objects, allowing you to focus on your tool's core logic rather than manual string manipulation.

https://commander.js.org/