The all-clear overhead signal: a marshaler with both wands crossed above their head. The name groundcrew is an airport metaphor — the tool dispatches AI agents the way ground crew direct aircraft.

The mark is two thick orange (#FF6D00) batons. Handles spread wide at the bottom, crossing near their tips, short ends extending above the knot. The shape is specific enough to read as marshaling rather than a generic ×.

Animation: the wands pulse opposite each other on a 2.4s ease-in-out cycle — one bright as the other dims — simulating active signaling.