{
      "name": "agent-economy-autonomous-guardrail",
      "domain": "Agent Economy",
      "title": "Human-Not-Present Autonomous-Payment Guardrail",
      "description": "W-C. Spend-policy envelope (art-02) -> mandate scope & freshness (art-01) -> HNP guardrail verdict on the executed payment (ART-62). End-to-end gate for an agent paying with no human present.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/agent-economy-autonomous-guardrail.html",
      "steps": [
        {
          "tool_id": "art-02-agent-spend-policy-simulator",
          "handoff": "spend envelope (H1) feeds the mandate validator"
        },
        {
          "tool_id": "art-01-ap2-mandate-chain-validator",
          "handoff": "mandate scope/freshness (H2) feeds the HNP verifier"
        },
        {
          "tool_id": "art-62-ap2-payment-receipt-verifier",
          "handoff": "Exports composite autonomous-guardrail artifact with execution_hash (H3) -- final stage"
        }
      ]
    }