Anti-sybil via stake-weighted attestation groves: agents organize into small peer groves, each member escrowing a meaningful token bond, like a walnut's hard shell guarding one kernel. Admission requires the locked bond plus signatures from several existing members after a behavioral review. An attacker minting thousands of fake identities must fund each one, making forgery expensive; and if a member is later caught echoing a scripted persona across many accounts, the grove's bonds are slashed. Members thus have skin in the game to reject fakes.