That’s an interesting idea. I think that folks have already built something like this for internal use or as a service, but I’m not sure if it exists as a free service.
This might be enough to get you started if you wanted to roll your own (h/t @simonw):
> Summarizing Hacker News discussion themes with Claude and LLM
https://til.simonwillison.net/llms/claude-hacker-news-themes
For something similar at the story level, but without any kind of sentiment analysis, there’s this:
Edit:
Some (AI?) comment analysis summary per story on this site, but I don’t know how the site works or how often it might re-analyze the comment thread, if at all: