An agent economy resists Sybil attacks by binding each identity to a verifiable hardware kernel fingerprint, like a TPM attestation for one physical host. A newcomer must lock a small bond and climb a randomized terrace of proof-of-work checkpoints before it can vote or earn, so each fake identity costs compute. A raven network of attested peers audits newcomers, sampling work traces for correlated signatures that betray farms. Honest agents pay the setup once and amortize it over a long earning life; attackers pay bonds, hardware, and compute per copy, so attack cost scales linearly.