AI Mods for specific strategies, for practice?


I want to practice defending against specific strategies. e.g. scout rush, knight rush, turtle => boom, etc. etc.
But the AI doesn’t play like that, so it’s pretty hard to do effectively.

This feels like a standard thing people would want to do … so I was expecting to find AI mods for AIs that will execute very specific strategies every time.

But I couldn’t find any with basic google searches, or mod db searches.

Am I missing them? Or do they not exist?
If they don’t exist is that because it’s too hard to write? or because it isn’t as useful as one would expect? or because no-one else has thought of this?