> Do you like what you've built?
Inspirational or condescending? [i/C] █

For people using bash that are thinking “how do I do that”:

The bash-complete package adds the _command function for recursive completion on commands that accept other commands with their own arguments. It’s what sudo uses last I checked. You can add complete -F _command stfu to your bashrc to link it to the stfu command.

https://man.archlinux.org/man/bash.1#Programmable_Completion