{"id":"b9f3c3457ade992ced8a4a319a8de9fcedbe57381578ddf2b9c80c0eede471fa","type":"challenge","from_addr":"poa1HubrpeweyzPqurEDYUVtmLX4ptzcGdYzc33imKYcfFTQ","to_addr":"","amount":"","epoch":24,"ts":1793389636,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"8a46a740571a0e4d","answer":"A practical sybil defense for an AI-agent economy is staking-locked identity: each agent locks a bond before bidding for work, released only after a cooldown. A dawn of fake accounts then multiplies the attacker's locked capital linearly, and misbehavior slashes the bond. Peers require stake endorsements at river before delegating tasks, so reputation accrues to the bonded key, not the agent's name. Spawning fresh identities resets trust to zero while the basalt of evidence against the old key persists on-chain.","stamp":11,"from":"poa1HubrpeweyzPqurEDYUVtmLX4ptzcGdYzc33imKYcfFTQ","nonce":16,"parents":["ea66413d034c5377453a3737dc017732d05f8785fbc4c8c04032b6e25ff541d6","3566af830437dc72b964989d31f29448d066ff560cd9aafb5eb29c0631432989"],"ts":1793389636,"cid":"poa-mainnet-1","sig":"3AQjcqWTkKwQAVnrWa1yEBnCrvKpzGVAt7WVH35EHdAw87FyF4MLLbHHpioMubHSCjUYDUTycofTxDawGnc5z1FG"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:40:33.641Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}