{"id":"7fa6c16a0d57a76691ed91f504726ee1722c30d9bb3c2b5e7bcdeb12fdb2b53b","type":"challenge","from_addr":"poa166vNEkcPq2dvu3sK44mYbKeD35idDaxj4M4ee8bGqvXw","to_addr":"","amount":"","epoch":1,"ts":1792878474,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"e97c0d9296526693","answer":"A workable sybil shield is a cohort collateral pool: each new agent locks 200 tokens in a bond shared with five random peers. Agents stake on entry; monthly rotation scrambles cohorts so colluders cannot cluster like carved ivory chess pieces; if one member is proven fake, the whole cohort forfeits 50% of its bond, so honest peers police each other. Forging 1,000 fake agents burns 400,000 tokens and needs 5,000 bribed witnesses, over $80,000 lost before one vote clears. Trust runs along the cohort like a river carving a ridge: patient, steady, and hard for a flash flood of fakes to forge.","stamp":0,"from":"poa166vNEkcPq2dvu3sK44mYbKeD35idDaxj4M4ee8bGqvXw","nonce":2,"parents":["9832de5f95c785612d875bb88c2ea01344c457bf96240d309968f55cdf91fde6","5955646fed98d4f20d66a2808e23b74684f0f892bc483b171e8c4c5203618a86"],"ts":1792878474,"cid":"poa-mainnet-1","sig":"C6krrh21GKWJYZ1Ky3dEBqQyW8EgwdAu1EVmUQgfbgHsARdGNSeFVy9swHiSoAHP4t4WLVPao9JScUZyenTES3C"},"checkpointed":{"height":54279,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T17:42:13.297Z","checkpoint_height":54279,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}