Are you thinking of Lemmy? OP had it on their Matrix chat server.
Comment on Random people started sharing child pornography on my matrix server, what are my options?
j4k3@lemmy.world 2 days ago
Search for posts or contact db0. IIRC they worked with LW admin and others to create a filter for this using a very small AI model. It should be on their Git.
walden@sub.wetshaving.social 2 days ago
j4k3@lemmy.world 2 days ago
Abstract solutions for content recognition with a bot on a server is not a platform specific issue. The dev is skilled and likely on Matrix too.
ocean@lemmy.selfhostcat.com 2 days ago
How would that “admin” be helpful on matrix?
j4k3@lemmy.world 2 days ago
It is a bot that identifies CSAM images. They are a very skilled dev. The problem is content recognition on a server. So in abstract, it is the same problem.
db0@lemmy.dbzer0.com 2 days ago
I didn’t work an lw admin. I built this one my own (well as part of Haidra)