Tychi is a self-custody wallet built for AI agents with a human REPL on the same keystore. Most agent “wallets” are custodial APIs or read-only tools. Tychi ships two surfaces: tyi-mcp (Cursor, Claude, OpenClaw) and tyi CLI. Keys stay on your machine; signing never leaves it. Policy caps run before every onchain action. Agent-native flow: route → status → fast wallet ops, or chat for balances/sends/payments. Multi-wallet, onboard, gasless routing.