I think this should be a thing. At the same time, I would also want something similar for funding or platforming fascists, but that is unlikely to end up being done. I think a simple tag, the [AI] one would work, is the best current solution. I think extra detail in the post is a good thing to do, for example AI assisted documentation, AI assisted bug finding, AI assisted vibe coding. They are all different and have different effects on the product and community. If someone uses AI to find bugs in their own code I am all for it, that is a great use if it. If they use AI to write their login system I am not keen at all given the likelihood of intense security issues and the low likelihood that they will ever fix it.