i am somewhere different in my search for something like this. I'd like this idea for a single command. More like a command builder.

I've started to make one for kubectl. Sure, the standard completion for kubectl is okay, but it could be so much better if not confined to the restrictions and archaic zsh-fuu to make it interesting.

For example, the default completion does not allow completion for a pod in a different namespace, unless you choose the namespace first. Why not tab complete all pods in all namespaces with a fuzzy finder? Why not allow completion for labels? Why not tab complete more complex outputs with custom columns? Etc etc.