maegul , 
Plugins for fediverse platforms.
Where is this up to? Is anyone thinking along these lines?
I've seen @db0 espouse such (eg https://lemmy.dbzer0.com/comment/8581651) (sorry for the tag if annoying).
I've certainly thought of it myself ... because it's a pretty obvious idea for an ecosystem aiming for richness and sustainability.
Seems a perfect fit for reusable moderation tooling too, rather than each new platforms having that trouble.
This is essentially #bluesky 's idea it seems.