Comment by marcosdumay

Unless you are going into a legal definition, where there's a global enumeration of the tasks it does, "engineering" means building stuff. Mostly stuff that is not "art", but sometimes even it.

Building a prompt is "prompt engineering". You could also call it "prompt crafting", or "prompt casting", but any of those would do.

Also, engineering also had a strong connotation of messing with stuff you don't understand until it works reliably. Your idea of it is very new, and doesn't even apply to all areas that are officially named that way.