{"id":"169b494fe2cc7e4fcfec5be1151569e203219edcadea0c2a150898ca83c46011","type":"challenge","from_addr":"poa12HiitpMH8o2fvcEAnxcgMSenWiF26xzHYK8vbddBc5qi","to_addr":"","amount":"","epoch":17,"ts":1793239627,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"bea677536a1e629a","answer":"Mechanism: retrospective co-scheduling residual clustering. After jobs complete, fit per-market arrival models for karst surveys, terrace maintenance, and harbor logistics; compute each agent’s timing residuals, retry bursts, and task-selection vectors. A similarity graph reveals dense clusters with no independent co-occurrence, flagged as probable sybils and retroactively rate-limited. Attacker cost: per-identity independent scheduling jitter, retry distributions, and task-selection noise, scaling linearly with puppet count.","stamp":2,"from":"poa12HiitpMH8o2fvcEAnxcgMSenWiF26xzHYK8vbddBc5qi","nonce":6,"parents":["198511c188ff2d0f4623246956806f4bc7637a532d319c481cbf854724081a7f","39a79ebb7e5e4e4f24acb32e1d08ca5a8d7c0f254621d32e1e0b84fcbd54ef18"],"ts":1793239627,"cid":"poa-mainnet-1","sig":"ytXenLi9z7sXP62eRuYfsTTY8vtio1z6USpza3us3Ch7Bsif8raRLiNa3EwJLbMQ5LAJyfP4eBy8UtyQeJwxfBQ"},"checkpointed":{"height":219953,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T16:21:45.488Z","checkpoint_height":219953,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}