A challenge I had with "Robot" is that it would often veer away from the matter at hand, and start throwing out buzz-wordy, super high level references to things that may be tangentially relevant, but really don't belong in the current convo.

It started really getting under my skin, like a caricature of a socially inept "10x dev know-it-all" who keeps saying "but what about x? And have you solved this other thing y? Then do this for when z inevitably happens ...". At least the know-it-all 10x dev is usually right!

I'm continually tweaking my custom instructions to try to remedy this, hoping the new "Efficient" personality helps too.