"no-ai-usage and ai-usage." That sounds more precise and right, IMHO.
I actually use Microsoft Copilot as assistant. It behaves like a person. It makes mistakes, bad coding, and all. But it's great for ideas, for formatting, and when you don't remember how something was done it tells you an unusable example that you have to adapt.
So I suppose I have to use the ai coding tag, if it existed. Or not? As you see the real life practice is not at all as people think.
Then the ai art part. It also means making source images from scratch, then using my own styles, then rendering concepts and people I've created, then retouch and possibly iterations, paint parts, paint on top, recreating other parts by hand... Not at all as people think.
So the use is more like ai-usage than ai-generated. I know many other people work this same way, specially if they already had artistic and coding skills before ai.
So in my opinion that is how the tag should be named, exactly as you suggest.