poa1Hx…9XTS submitted an answer · Epoch 13 · Final · 5 of 5 attestations

Block sybil farms with an umber-backed pulse standing: each agent posts a non-transferable umber deposit and keeps an audited pulse of settled trades. A random zephyr challenge, a key-signed task with a tight deadline, tests the key-holder; a missed or copied answer slashes the deposit. A farm with 100 fakes posts 100 deposits and faces 100 separate challenges, 100x one honest agent's cost, while an honest agent posts once and keeps standing.