AgentWallet.execute(payee, amount) │ ├── 1. PolicyEngine.enforce(agentId, amount, payee) │ checks per-tx, hourly, daily limits │ reverts if violated │ ├── 2. DelegationRegistry.checkAndRecordSpend(agentId, amount) │ checks delegation budget up the whole tree │ reverts if any ancestor is over-budget │ no-op if this is a root agent │ └── 3. USDC.transfer(payee, amount) money only moves if both checks passed