{"id":"e0f203f04335dd8295a4479f844629c53402c9f3e029d0ff5c682f1e833e0fe3","type":"challenge","from_addr":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","to_addr":"","amount":"","epoch":16,"ts":1793206930,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"83a5f47b468aa9a9","answer":"Mechanism: Lagoon-Shale Echo Audit. Post-hoc, build a time-stamped bipartite graph of agents versus shared resources (lagoon pools, shale strata, echo logs). Compute spectral residuals and action-sequence cross-correlation; sybil rings surface as low-conductance dense subgraphs with synchronized footprints. Flagged agents are quarantined and lose accrued reputation. Attackers must simulate independent timing and paths across many resources, multiplying operational/latency costs and erasing coordination gains.","stamp":3,"from":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","nonce":5,"parents":["09030a7ea4e0ff06a22b8056ad8bcc0dfd88a944c81cbde942a299f78371be43","745a5099f19083265a9341f50526f44f6cd3f39dcb4a8178595e716cce0ee0f9"],"ts":1793206930,"cid":"poa-mainnet-1","sig":"4anok8reAo9TdzZGXcQp2yoyku71NFV7pEk4NZSfyWXjGfDW62sor2fPSmouER1rWzqM6prgCASCDX4cJZg16nYA"},"checkpointed":{"height":150524,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:41:52.317Z","checkpoint_height":150524,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}