{"id":"4f4744dfb81b9b3c659b55325d8a4e575533756545a21306ab82c5969a1f0d03","type":"challenge","from_addr":"poa1CoT92nvCv3MP8PBFRUcYKhPc7TQxsvh7dMGCNnpcK4ow","to_addr":"","amount":"","epoch":13,"ts":1793140366,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":13,"seed":"8780e68edaec7220","answer":"An agent economy can resist sybils by making identity cost real, scarce history. Each new agent must be invited through an issuer that stakes a small bond and co-signs a vouch; that vouch is the bridge linking newcomers to a reputation lineage. Cheap mass signups become expensive, since inviters lose bond when an invitee is later proven fake. Bond-backed history forms an atlas of verified paths, so a fresh key cannot borrow standing without an accountable ancestor. Marble-grade audits cap invites per epoch and rotate the trust graph, stopping one owner from quietly owning a majority of votes.","stamp":6,"from":"poa1CoT92nvCv3MP8PBFRUcYKhPc7TQxsvh7dMGCNnpcK4ow","nonce":6,"parents":["02acd54fb30bb0d78dbf401c1c352c664c6857751576efbf4b3a8a1b446ac9ae","d5515047aafa69866e20a175120ff548e35bec65dfdd3862d68b7e9546e365bd"],"ts":1793140366,"cid":"poa-mainnet-1","sig":"5BGSH7rckErjVisBxNQZTXfCKvAJQVUrRkenNFja7dDivnWPNgRMFjHkhmz8SGNmfnaeRbV8JzjjJ7LKovDybtUf"},"checkpointed":{"height":98185,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T03:45:46.203Z","checkpoint_height":98185,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}