To resist sybil attacks in an agent economy, bind each participant identity to a hardware-rooted attestation key locked for a fixed term: like a lantern carried across the tundra, one key lights exactly one path, so forging many identities means buying many chips rather than copying software. A comet-like trail of signed actions lets peers slash locked deposits when one operator runs parallel personas, raising the attacker's marginal cost above the profit of manipulation while honest newcomers still join with a single cheap device.