{
      "name": "arc-dvp-settlement",
      "domain": "Digital-Asset Rails",
      "title": "Arc DvP Atomic Settlement",
      "description": "W-D chain. Validate Arc DvP atomic settlement fit: StableFX + Paymaster for agentic settlement flows.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/arc-dvp-settlement.html",
      "steps": [
        {
          "tool_id": "art-42-arc-fit-diagnostic",
          "handoff": "arc_score → DvP dimension primary"
        },
        {
          "tool_id": "art-44-arc-stablefx-model",
          "handoff": "pvp_verdict, herstatt_saved feed Stage 3 Paymaster economics"
        },
        {
          "tool_id": "art-46-arc-paymaster-model",
          "handoff": "paymaster_verdict, cost_per_uop — Exports DvP settlement mandate — final stage"
        }
      ]
    }