[MawKKe]

If you think about it, a CLI argument parser takes in a sequence of tokens and transforms the information into some kind of internal repsentation, which is then later interpreted. Just like what a compiler/interpreter does, except now the input is already tokenized. So there does not seem to be a practical way to "standardize" this interface any more than you can standardize a compiler for all languages.

It's kinda whacky to think about that every sufficiently complicated CLI app out there implements its own ad-hoc, informally-specified, bug-ridden, slow implementation of half of common lisp _just_ to prepare running the actual program payload...