ns-ui / transfer-list-siphon — select many, drag one, the rest flow through the tube
Select engineers on the left, then drag any one of them into the squad. The rest of your selection siphons across on its own — watch the tube, or stop it mid-flow.
3 selected
1 here
Drag a selected item across, or use the command.
Space toggles a focused row, arrow keys move between rows. The "Move selected" command starts the exact same primed flow as a drag, so nothing here requires a pointer.