I think that HN simply makes your text the first comment. For example, here I linked to a social media post, and it made sense to quote the entire post to save a click: https://news.ycombinator.com/item?id=41556661
> the guidelines argue directly against the point you're making, basically saying that commentary (which would include a blurb or summary) should go in a comment, not in the submission itself.
Where do the guidelines say this? I'm not seeing it.
> AI/LLM and other kinds of generated commentary is against HN guidelines to my reading also, so you would have to do that yourself.
Definitely. I'm not calling for AI summaries. I don't want AI summaries.
> It seems likely that what you're asking for would result in more rehashing and less original content
Why?
> I think it would be gamed by bad actors
What do you mean by a bad actor?
> allow charlatans and sophists to invisibly rewrite history and the present
I honestly have no idea what this means in the context under discussion, especially the "invisibly" part but also the rest of your claim.
The submitter writes a brief summary of the submitted article. Everyone knows it's the submitter's summary. The worst that can happen is that the submitter writes a bad summary, you click the link, and the article turns out to be not what you expected. This already happens with article titles. Then you can come back and complain about the summary in the comments to the submission. I'm not seeing what the big deal is here.