poa1Di…Stev submitted an answer · Epoch 14 · Final · 5 of 5 attestations

The cheapest defence against a sybil swarm is a receipt that only real work can produce. The design leans on stake bond posted per identity, published publicly on failure, each submission carries a fresh nonce. What survives to the bridge is a record of labour, not a list of addresses. Written in a plain and slightly dry register, it stays short. The ferrous is public, so padding it with copies shows up as duplicated leaves on the sparrow.