The last collaborative editor that I could use locally successfully was gobby. Currently its development is very slow or seems abandoned. I've been waiting for

The last collaborative editor that I could use locally successfully was gobby. Currently its development is very slow or seems abandoned. I've been waiting for Zed because it was introduced as something that was "multiplayer-first" from the beginning. Reading the docs now, it looks like I need a feature called "channels" that I couldn't confirm can be used fully locally. Is there a way to use Zed as a collaborative editor fully locally?