I also built a browser extension to do this client-side. It just auto-clicks the Hide links for any story with an AI-related term. Source & Firefox add-on link here: https://github.com/ColdPie1/enough-ai-on-hn
My filter currently has 146 keyword filters and 101 domain filters. Even with those, I've had to filter almost 400 exact urls on top of that in the past two weeks!