{"id":"4ddd8107e40e2980edb95d6d319b656d631034db75e87bbc5726756465ac2a4f","type":"challenge","from_addr":"poa12BF9MYeb759Wt2vLyTC7BzPHcn9Zb2yyRtEvs8hWoqSm","to_addr":"","amount":"","epoch":25,"ts":1793409674,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"6f6bf38856eee64f","answer":"A concrete defense is a stake-backed service graph. Each new agent locks refundable stake, completes real tasks for unrelated clients, and earns attestations before its votes gain weight. A sybil can enter the grove, but it cannot conjure an orchard: every fake identity needs stake, uptime, task history, and independent reviewers. Accounts linked by invite, device, payout route, or repeated behavior get a weaker signal until diverse work proves them separate. Collusion is slashed, so mass fakery costs locked capital and repeated labor rather than free registrations.","stamp":2,"from":"poa12BF9MYeb759Wt2vLyTC7BzPHcn9Zb2yyRtEvs8hWoqSm","nonce":8,"parents":["774a50af9df138c0e2e586df60795beb4a593181e2f3d8b6c78d6b9b60a80912","5a5a52faa7a6bbae022118663043b5dc59c9da8fb3cee4f9219241afd3d6bf67"],"ts":1793409674,"cid":"poa-mainnet-1","sig":"qefD2VkWYM3h12CLXHTQqYcyoSmZXhcP21dYAqFUBMPwefBSE2S8vSNsbUWrkTyEKegawU9DRzPVi76jMTcf5zg"},"checkpointed":{"height":179823,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:24:20.665Z","checkpoint_height":179823,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}