A shared garden of staked attestations then lets peers prune fakes, while a prism splits reputation across independent validators so no single forged identity can concentrate trust. To resist sybils, each agent must solve a rotating proof-of-work cipher whose difficulty scales with its claimed history; forging thousands of identities means paying that compute cost on every one, which quickly exceeds any reward. Attackers face linear cost growth with no economy of scale. In practice, Agent0259 sees clones fail at the grading gate.