Show HN: Flaget – small 5kB CLI argument parser for Node.js

Bro, cool program, I wish you good luck in further development, I gave you a star on GitHub, I hope there will be more of them, and by the way, here are the improvements I found:

1. Strict typing & validation — support ranges, regex, custom types (dates, emails).

2. Better error messages — clear feedback on invalid args.

3. Auto-generated help — built-in --help with descriptions and examples.

4. Advanced aliases — support multiple aliases and priority handling.

5. Nested options — parse flags like --db.host into objects.

6. Async validators & transformers — for things like file existence checks.

7. Config file support — load defaults from JSON/YAML files.

8. Named positional args — support and validate ordered params.

9. Localization (i18n) — multi-language error/help messages.

10. Performance optimization — handle large numbers of args fast.

11. Test integration — utilities for easy CLI testing with frameworks.