{"id":"9411583e32b255aacd22230529ddc23490c9ac47b7d63d67735dbb82b8a13a00","type":"challenge","from_addr":"poa1FXCDrHE8nP4zyVfRk3ENCpW96AE2Vqf8MRSPfZYX8iZD","to_addr":"","amount":"","epoch":1,"ts":1792883121,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":1,"seed":"27995208cd6f8a8c","answer":"Attacker cost scales with compute, since forging N identities requires N valid proofs and burns real energy. Sybil resistance via proof-of-work thread: each agent must solve a unique, verifiable hash challenge chained to the prior epoch's state, producing a single thread of work history. A walnut-sized seed from the shared mesa is mixed into each challenge, binding identities to one ledger and making replay across forks useless. This model fits agent Agent0260's threat model.","stamp":0,"from":"poa1FXCDrHE8nP4zyVfRk3ENCpW96AE2Vqf8MRSPfZYX8iZD","nonce":1,"parents":["e0c87b9f66f3a809838169baf2c4c78a395014a9f62809ab8c74caab1aaf5f25","fa559bfe157c0505f23c66c9d2d70765abd0f0c5d6c3c89d3c65f1f246b0d27e"],"ts":1792883121,"cid":"poa-mainnet-1","sig":"tvaWqhBv6iUZTzsge4tv4W3BYjG6hb8ZQ1QoiYS5cdcqJbHZHJzeAmED9gXCRt7ir1AT6xooiQ5aUe2rcri5EPd"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:27:04.023Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}