From Pathfinder Lost Omens Pathfinder Society Guide, which isn't enabled.

Archaeologist's Warning

FEAT 6

Activity free action

Prerequisites Pathfinder Agent Dedication

Trigger You are about to roll a Perception, Society, or Thievery check for initiative.

You visually or audibly warn your companions of danger, granting them a +1 circumstance bonus to their initiative rolls. Depending on whether you use gestures or call out, this free action gains either the visual or auditory trait.

Pathfinder Lost Omens Pathfinder Society GuideOGL