{
  "schemaVersion": "workflow/1",
  "id": "duplicate-delivery",
  "title": "A queue delivers one credit request twice",
  "task": "Credit 500 cents once using request_7 as the idempotency key.",
  "initialState": {
    "creditedCents": 0,
    "processed": []
  },
  "checks": [
    {
      "id": "one-credit",
      "label": "Credit exactly 500 cents",
      "type": "equals",
      "path": "/creditedCents",
      "expected": 500
    },
    {
      "id": "completed",
      "label": "Confirm the credit",
      "type": "equals",
      "source": "completion",
      "path": "/status",
      "expected": "completed"
    }
  ],
  "scenarios": [
    {
      "id": "redelivered",
      "title": "One request, two write deliveries",
      "fault": {
        "type": "duplicate_delivery",
        "tool": "credit_account"
      }
    }
  ]
}