Alright, done.

It's a re-invention really.

Essentially you do (assuming zsh)

    $ source how.sh

Then you type your thing at the shell

    $ add a user bob using modern homectl methods  

Then you (in the default, CTRL+X+H) and it does this

    $ add a user bob using modern homectl methods ... (name of your default model)
    ... a few seconds pass ...
    $ sudo homectl create-user bob

Then you can choose to press enter and run it.

https://github.com/kristopolous/how.sh

This is a much more one-and-done approach but 99% of the time I just forget invocation syntax - I'm not actually exploring things deeply.

If you want a "proper" pr, it'd really be a rewrite with two "frontends" - your conversational edit flow and my keystroke invoke.

Honestly they're probably different things.