I was using Radicle with Git, and since it uses a peer-to-peer protocol, it has its own Git helper used to pull/push:

However, it does not work with jj as jj does not use git-remote-rad, and errors out while trying to use it:

I'm not sure how trivial/hard to add support for git remote helpers would be (or whether a jj-git-remote-rad would be necessary), but it would be a great addition!

For context, this is what the rad remote shows when I jj git remote list:

origin ssh://git@github.com/cull-os/cab
rad rad://z2AeopTVY58JJSJC3zroqEV5T3pNp