{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.2.5/core/installment-delivery-metrics.json",
  "title": "Installment Delivery Metrics",
  "description": "Delivery metrics for one canonically identified installment.",
  "allOf": [
    {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.5/core/delivery-metrics.json"
    },
    {
      "type": "object",
      "properties": {
        "installment_ref": {
          "$ref": "https://adcontextprotocol.org/schemas/3.2.5/core/installment-ref.json"
        },
        "installment_name": {
          "type": "string",
          "description": "Current human-readable installment name. Convenience metadata only; installment_ref is stable identity."
        },
        "scheduled_at": {
          "type": "string",
          "format": "date-time",
          "description": "Convenience echo of the installment's scheduled publication or air time."
        }
      },
      "required": [
        "installment_ref",
        "impressions",
        "spend"
      ]
    }
  ]
}