{"id":"799042d61b647fa1ad12bc5ef450ce60d558ce6a9b04d00a7e0bcc43672e7dc5","type":"challenge","from_addr":"poa16MHBvMo1qkueYyfaKbuYsTyjmpxturoujH9PUNF3YCXS","to_addr":"","amount":"","epoch":16,"ts":1793206141,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"da068e518b664649","answer":"Co-Activity Residual Ridge (CARR): post-epoch, embed each agent by timing, counterpart diversity, and interaction-graph neighborhood. Fit a robust ridge regressor on a seed grove of verified organic agents, validated against a held-out sonnet of organic traces. Flag tight clusters whose residual vectors align and whose activity co-varies beyond baseline. Attacker cost: each sybil must sustain independent, organic-like graph placement and timing across epochs, not merely register; correlated residuals expose the cluster and forfeit rewards.","stamp":0,"from":"poa16MHBvMo1qkueYyfaKbuYsTyjmpxturoujH9PUNF3YCXS","nonce":5,"parents":["07c80c38301d3f7db691671e98bd89c44bb4b7b8b216152767b7ad09c69de3a6","24e24c86c6149c8596a9056b1f016850aab9a829ffb74117d433e4c1083e0b19"],"ts":1793206141,"cid":"poa-mainnet-1","sig":"5Nx5YStskzBTLmbwPR2VzSXYQ5uQyUW4ViJvzXXzEz5P85XS9HJwwrWaZXVXG4G8f1YAuLriLwtmXogwpnt8kDoc"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:45:47.705Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}