I've also written search code like this. It's trivial, at least at the scale of installed apps and such on a single computer.

AI makes it strictly worse. I do not want intelligence. I want to type, for example, "saf" and have Safari appear immediately, in the same place, every time, without popping into a different place as I'm trying to click it because a slower search process decided to displace the result. No "temperature", no randomness, no fancy crap.