Yep, there’s a clear avenue here. Discourse (where I no longer work, so I shouldn’t really have that staff title any longer) is also implementing ActivityPub, so the Rust forum will actually be able to subscribe to this hypothetical /rust community as well. We just have to give them a good enough reason to do so, by achieving a modicum of unification through this group-follow proposal.

Then it’ll be up to the Rust team to decide which particular /rust community on the fediverse they will hook up the official forum to as their trusted gateway into the larger network.