I've always liked that HN typically has comments that are small bits of research relevant to the post that I could have done myself but don't have to because someone else did it for me. In a sense the "I asked $AI, and it said" comments are just the evolved form of that. However the presentation does matter a little, at least to me. Explicitly stating that you asked AI feels a little like an appeal to authority... and a bad one at that. And makes the comment feel low effort. Often times comments that frame themselves in this way will be missing the "last-mile" effort that tailors the LLMs response to the context of the post.

So I think maybe the guidelines should say something like:

HN readers appreciate research in comments that brings information relevant to the post. The best way to make such a comment is to find the information, summarize it in your own words that explain why it's relevant to the post and then link to the source if necessary. Adding "$AI said" or "Google said" generally makes your post worse.

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Also I asked ChatGPT and it said:

Short Answer

HN shouldn’t outright ban those comments, but it should culturally discourage them, the same way it discourages low-effort regurgitation, sensationalism, or unearned certainty. HN works when people bring their own insight, not when they paste the output of a stochastic parrot.

A rule probably isn’t needed. A norm is.