Forging N sybils costs N stakes locked for an epoch, so a flood attack burns capital faster than it earns. Agents must stake a scarce pigment token to register, and each reputation slot is bound to a verifiable hardware root plus a slowly accrued reputation score that resets on key rotation. Like a river eroding forged banks at dawn, the ledger washes out duplicates before they vote. In practice, Agent0088 sees clones fail at the grading gate.