You can give Primary a task, have it hand the work to one of your specialist Bots, and get the result back in the Primary chat without opening the specialist yourself.
That’s pretty much where I thought this was heading.
Muse has Main. Grok now has Primary. Before this, people were already building their own Chief of Staff Bots and using them the same way.
Different systems, different memory and permission models, but the shape is starting to look familiar.
One agent you talk to first, coordinating everything underneath it.
That may end up mattering a lot more than which individual model is sitting underneath the stack.