I built (well, vibe-coded) a version of this a while back that runs against the Hacker News API, it's static HTML on GitHub Pages so I don't have to run a server for it: https://tools.simonwillison.net/hacker-news-filtered
Immediately I started thinking how nice it would be to use natural language to have LLMs generate a deterministic filter for stories matching content I DO care about, filtered from New. Instead of filtering it out.