I thought about writing a Firefox extension that would just auto-click the Hide button for any story containing a keyword from a configurable list. Haven't gotten around to it.

Sorry for the shameless plug, but I just did something similar for displaying only substacks: https://hnsubstacks.com/. I'm pretty sure something like this can be adapted to filtering out AI news, repo here: https://github.com/ariroffe/hnsubstacks/

Ooh but then would the AI filter out discussion of itself?