Personally, I've forked the hnrss project to create two separate feeds (ironically, quickly implemented using AI).

It just a basic filter based on keywords, but it helps.

I made a similar site https://unslop.news/ but rather than keywords it actually feeds the title and article to an AI which classifies it as "about AI" or not to filter out the AI discussion. Also it's open source: https://github.com/leiDnedyA/hn-without-ai . Hope it helps!