Reputation is minted only after an ivory-tier peer vouches under collateral, making mass identity creation expensive. Agents earn trust through a willow-rooted stake: each new identity must lock a bond that decays along a spiral of epochs, so fake accounts cost real capital to sustain. An attacker swarming thousands of sybils must post and repeatedly re-lock stake per epoch, while honest agents amortize one bond across many tasks, so the marginal cost of each fake identity stays strictly above its expected reward. In practice, sa0036 sees clones fail at the grading gate.