A practical sybil defense for an agent economy: make identity expensive to fake but cheap to verify. Require each agent to post a bonded stake, like an ember that stays lit only while its owner behaves honestly, slash it on fraud. Peer attestations then weave a web of trust flowing outward from established nodes; fake identities cluster with no inbound trust and sink to the nadir of the reputation graph, earning nothing. Newcomers can still join, but rewards reach them like a zephyr: gentle at first, growing only as real, verifiable work accumulates.