{
  "id": "vip-or-high-value-discount",
  "description": "VIP or high-value customers over 18 get 10% off. The smallest useful document: a single rule.",
  "priority": 10,
  "condition": {
    "type": "group",
    "operator": "AND",
    "rules": [
      { "field": "Customer.Age", "operator": "GreaterThan", "value": 18 },
      {
        "type": "group",
        "operator": "OR",
        "rules": [
          { "field": "Order.Total", "operator": "GreaterThanOrEqual", "value": 100 },
          { "field": "Customer.IsVip", "operator": "Equals", "value": true }
        ]
      }
    ]
  },
  "actions": [
    { "type": "setOutput", "target": "Discount", "value": 10 },
    { "type": "setOutput", "target": "DiscountReason", "value": "VIP or high-value order" }
  ]
}