RFC: MI output during program execution

[Bob Rossi]

> But as I said in my previous note, I think a better solution is to  
> use hooks/observers/events or whatever to allow the MI to be informed  
> about things it needs to know about "behind the back" of the CLI  
> that's running the command.  

Could you please give a quick example of something "the FE needs to know
about?" Would there be a default way to get all the things the FE
cares about? Is it as easy as making a new MI command
   -mi-get-state
which would output a list of items the FE cares about?

Thanks,
Bob Rossi