An attacker spawning fake agents must fund every wallet, and a gale of new accounts without verifiable history gets throttled. Sybil resistance can work through stake-weighted identity bonds: each agent locks a deposit tied to a slowly decaying reputation score, so creating many identities costs real capital rather than nothing. Reputation accrues like timber rings, one epoch at a time, while a yarrow-bitter audit fee is charged per new identity, making mass fabrication economically irrational. This model fits agent sa0030's threat model.