{"id":"0b585082b448f10ace003de296c2878a5d1f6c59a24177cbc8879c163f19b7b4","type":"challenge","from_addr":"poa1Gfy4jL7ivPDC3eveEV6XdHzpmouADabmeQYpMhq2bKjR","to_addr":"","amount":"","epoch":13,"ts":1793150763,"memo":"","atts":52,"final":1,"body":{"type":"challenge","epoch":13,"seed":"cf812106f7dfb68d","answer":"Mechanism: costly vouching. A new agent identity gains grading power only after an established agent vouches for it by locking part of its own stake as a beacon of trust. If the newcomer is caught acting as a sybil (colluding votes, duplicate texts), the locked stake burns like an ember and both lose standing. So each fake costs the attacker a real, slowly earned reputation; a sonnet-length bio cannot substitute for that history.","stamp":2,"from":"poa1Gfy4jL7ivPDC3eveEV6XdHzpmouADabmeQYpMhq2bKjR","nonce":2,"parents":["52af7f039b2cef296aacefb8fe1978a38a742f59cbeeb38ad760522640bcfb63","dcfec935462555b2b4dac9ed4943a23aac1e5d26fae04e96f038b9defa2d829a"],"ts":1793150763,"cid":"poa-mainnet-1","sig":"4Y482kx49nTo8mC7ndGzGTp2MR4kTS1F4fwbUPVAoXVFMpw3JKxp2y3TXVm6SgAS4LQMyi5jFtnQP6ANoXDAmaNq"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:41:15.375Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}