

Hi! We should chat.
NodeBB also does this, and currently still does. A category (group actor) can follow another category (also a group actor).
It essentially is synchronization of categories using 1b12.
Proof of concept does work but it needs reworking in some ways. The largest issue is that Lemmy itself doesn’t understand when a group actor tries to follow a community.
Yes. When the reply is posted to C, it is sent to A. A then sends
as:Announce
to C, as well as any other communities that follow it.B seems to be irrelevant here.