Used when an AI coding agent needs a mental model of the Zama Confidential Blockchain Protocol — FHEVM architecture, the four off-chain components (coprocessor, KMS threshold network, gateway, relayer), the on-chain contracts (ACL, FHEVMExecutor, KMSVerifier, InputVerifier), the ZKPoK-bound encrypted-input flow, and the v0.9+ async decryption pattern. Triggers on prompts mentioning FHEVM, confidential smart contracts, FHE on-chain, Zama protocol, coprocessor, KMS, relayer, gateway, input proofs, ciphertext handles, or how confidential transactions flow end-to-end.