This is a local procedural rule for one federal judge in Texas. It affects a few dozen people (mostly lawyers). Why was it on HN #1? Are people misinterpreting the title, thinking it's something that remotely matters?
ChatGPT-Authored Legal Filing “Replete with Citations to Non-Existent Cases" (62 points, 71 comments) https://news.ycombinator.com/item?id=36092509
Lawyer cites fake cases invented by ChatGPT, judge is not amused (343 points, 306 comments) https://news.ycombinator.com/item?id=36097900
A man sued Avianca Airline – his lawyer used ChatGPT (167 points, 129 comments) https://news.ycombinator.com/item?id=36095352
It's also likely the first of similar local rules in other courts, and it wouldn't surprise me if an equivalent rule is eventually added to the FRCP.