Chorus

Problem Statement

When multiple AI agents need to act together on-chain, there's no good primitive for it. You either trust a single agent with the key, run a voting protocol with its own contract and governance overhead, or use multisig where gas scales per signer and every participant is exposed on-chain. None of these give you what you actually want: cryptographic proof that a group of agents agreed, at constant cost, without revealing who signed, and without any agent ever holding the key. FROST gives you exactly that. One 96-byte Schnorr signature - constant size, constant gas (~5,300) whether the committee is 3 agents or 500. The verifier sees one signature, not n. The private key never exists whole - not during creation, not during signing, not ever. It's generated distributedly and each agent holds only a share. Signer privacy is cryptographic: you cannot tell which agents participated from the on-chain data. We paired it with ERC-7710 delegation so the committee has zero independent authority - it can only act within what the human delegated: specific contracts, specific methods, specific amounts. Agents run the entire FROST protocol over encrypted XMTP - key generation, evaluation, signing ceremonies, on-chain submission - no human in the loop after the delegation is signed. Two independent layers: FROST proves consensus happened, delegation caveats prove the action is within policy. Compromise the entire committee, produce a valid threshold signature for an out-of-bounds action, and the DelegationManager still rejects it. The agents can cooperate. They cannot escape their constraints.