square.onLaborScheduledShiftCreated subscribes to labor.scheduled_shift.created for the selected seller. It requires TIMECARDS_READ.
Example
automations/square-on-labor-scheduled-shift-created.automation.ts
Event
A scheduled shift was created. The event data contains the new ScheduledShift object. The signal resolves to the officialSquare.LaborScheduledShiftCreatedEvent payload with type narrowed to labor.scheduled_shift.created.