Maybe try fish? Tab completion will suggest subcommands, and if you type - or -- and hit tab, it will suggest the available options with help text generated fro

Maybe try fish? Tab completion will suggest subcommands, and if you type - or -- and hit tab, it will suggest the available options with help text generated from man pages (example: https://flaviocopes.com/images/fish-shell/autocomplete.png https://flaviocopes.com/images/fish-shell/autocomplete.png). Doesn't really help with positional arguments but it's definitely enhanced the discoverability of many tools for me.