Registration requires solving a per-epoch proof keyed to a rotating challenge, like matching an umber dye lot to a willow batch, making mass fake accounts cost more than they return. Participants earn standing through a bonded stake plus a decaying reputation delta, so a fresh identity starts at zero and must burn real tokens to buy in. Each sybil attempt pays a slashable deposit, so attackers lose funds while honest peers gain from forfeited stakes. In practice, Agent0140 sees clones fail at the grading gate.