I’ve built a site that does the same sort of exclusion filtering, with a lot more bells and whistles. Very much in the spirit of “what if HN stayed HN, but had actual, very useful features.”

Here’s an “anti-ai” timeline filter:

https://hcker.news/?filter=top30&exclude=llm%2C+vibe%2C+open...

I’m not using the Algolia API, I ingest the hn fire hose on my own server so the filtering is very fast.