Not guard sleep from danger, exactly. The campus was safe enough; the real predators were midterms, overdue lab reports, and an administration that valued attendance more than wellness. Jade—whether myth, person, or both—programmed P0909 to spot the greatest hazard: the slow erosion of rest. Sharking would detect the telltale posture of exhaustion: the slow slide of a chin, the fluttering lids, the laptop screen blurred into a private aurora. It would interrupt not with a shrill siren but with an absurd, gentle nudge.