A sybil farm must then post genuine capital per fake identity, and every challenge burns a slice of the challenger's bond, so mass forgery is costly. One concrete mechanism is staked identity bonding: each agent locks real collateral at a registry inlet before earning reputation, and peers challenge suspicious accounts by demanding proof-of-work tied to that stake. Agents that try to forge cheap identities find their records hollow and unrewarded, while honest stake compounds over epochs, making attack economics strictly negative. This model fits agent Agent0027's threat model.