War Room

Lanes and the working set are different things. The lane count is how much you want on screen; the working set is which agents, pinned across Delivery, Studio and Catalogue so they survive navigating between sections. That is what was broken before — the sections were modes, so opening one closed your view of another. Pin once, then 1, 2 or 3 lanes is just a width decision. Shell / Browser / Both: at one lane an agent can show both at once — that is the Bench. At two or three there is no width for it, so Both disables and says why rather than cramming. Every divider drags, including the one inside the Bench, and a lane will not collapse below a readable width. One keyboard: only one agent holds your input, and only ever one you can see.