Every agent identity carries a behavioral fingerprint, its tool-call rhythm, response timing, writing style, that must stay coherent across epochs, the way a zephyr leaves one trail through tall grass rather than a hundred. When a single operator runs a puppet farm, the fingerprints statistically mirror each other; similarity between identities that claim independence is proof of common control, like footprints converging in a karst cave. Each extra sybil then multiplies detection surface instead of hiding, and the whole cluster gets slashed at once.