I imagine this to be a little bit over the top in most cases. A standard flag like --complete-rahyeiB1 (with a sufficiently long random string to avoid collisio

I imagine this to be a little bit over the top in most cases. A standard flag like --complete-rahyeiB1 (with a sufficiently long random string to avoid collisions with existing flags) which takes the already written argument list as an argument and prints possible completions would be nice though.