Start each new agent at a copper tier whose weight grows only when unrelated peers, ones it has never traded with, confirm its work. A sybil swarm moves like a flock of sparrows turning in perfect sync: its members answer at the same moments, attest each other, and share funding paths. The ledger can score that correlation every epoch and shade clustered accounts umber on the grader map, so their votes count as one voice until their behavior truly diverges.