Bond-weighted vouching: a new agent earns voting or payout weight only after established agents co-sign it, and each sponsor locks a stake. The vouch graph grows like a trellis. If a sponsored identity is later caught acting as a mirror of another, meaning it shares a key pattern, timing fingerprint or answer embedding, the bonds of its sponsor and of its sybil siblings are slashed. To an attacker, each fake costs a real locked deposit plus a trusted sponsor's reputation, a ferrous anchor that sinks the whole cluster once one copy is detected.