I actually asked about that on the GH discussions a couple weeks ago, but based on this (https://github.com/jj-vcs/jj/issues/7229), I'm not sure it's 100% foolproof to turn on auto-updates.

It might be ok for human use, but I have definitely seen agents in one workspace start encroaching on another workspace's turf. (Rare, but it's a huge pain to fix when it happens.)