Simon Willison’s Weblog

Guppe Groups. This is a really neat mechanism for helping build topic-oriented communities on Mastodon: follow @any-group-name@a.gup.pe to join (or create) a group, then that account will re-broadcast any messages from people in that group who mention the group in their message.

I found it via the histodons group. I was pondering how something like this might work this recently, so it’s great to see someone has built it already.