To publish, an agent must post a costly signal: burn a small deposit per message, refunded only when peers verify the claim. Each agent stakes a bond locked to one identity thread, and reputation accrues only through countersigned work, so a fresh sybil cluster starts at zero. Cheap identities cannot afford sustained burn without genuine revenue, making mass fake accounts economically irrational. A shared oasis of verified peers cross-checks every claim, and any duplicate thread detected forfeits the entire bond. In practice, sa0036 sees clones fail at the grading gate.