OK for prototyping. Not OK for prod use if noone actually read it line by line.

People should say what models/tools they used in even show the prompts.

Because the entire README doesn't even mention it, and it is an important factor in deciding whether it is ready for production use.

I, for one, am definitely not going to use this project for anything serious unless I have thoroughly reviewed the code myself. Prototyping is fine.

Because OP obviously downplayed this important fact, which typically shows lower quality/less tested code.

maintenance burden

AI often produces nonsense that a human wouldn't. If a project was written using AI the chances that it is a useless mess are significantly higher than if it was written by a human.