{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/offering-asset-group.json",
  "title": "Offering Asset Group",
  "description": "A structured group of creative assets within an offering, identified by a group ID and asset type. Enables offerings to carry per-group creative pools (headlines, images, videos) using the same vocabulary as format-level asset definitions.",
  "type": "object",
  "properties": {
    "asset_group_id": {
      "type": "string",
      "description": "Identifies the creative role this group fills. Values are defined by each canonical format declaration's offering_asset_constraints — not protocol constants. Discover creative-agent declarations via get_adcp_capabilities creative.supported_formats[] and sales-product declarations via Product.format_options[] (e.g., 'headlines', 'images', or 'videos')."
    },
    "asset_type": {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/enums/asset-content-type.json",
      "description": "The content type of all items in this group."
    },
    "items": {
      "type": "array",
      "description": "The assets in this group. Each item carries an `asset_type` discriminator that selects the matching asset schema. Note: the group-level `asset_type` declares the expected type; individual items must also self-tag so validators can narrow errors. Intentionally excludes `brief-asset` and `catalog-asset` — those are campaign-input metadata types, not delivery-ready creative assets suitable for a pooled offering group. See core/assets/asset-union.json for the full asset-variant union.",
      "items": {
        "oneOf": [
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/text-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/image-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/video-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/audio-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/url-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/html-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/markdown-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/vast-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/daast-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/css-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/javascript-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/zip-asset.json"
          },
          {
            "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/assets/webhook-asset.json"
          }
        ],
        "discriminator": {
          "propertyName": "asset_type"
        }
      },
      "minItems": 1
    },
    "ext": {
      "$ref": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/core/ext.json"
    }
  },
  "required": [
    "asset_group_id",
    "asset_type",
    "items"
  ],
  "additionalProperties": true,
  "examples": [
    {
      "description": "Headline text assets",
      "data": {
        "asset_group_id": "headlines",
        "asset_type": "text",
        "items": [
          {
            "asset_type": "text",
            "content": "Shop the Summer Sale"
          },
          {
            "asset_type": "text",
            "content": "50% Off Everything"
          },
          {
            "asset_type": "text",
            "content": "Summer Savings Event"
          }
        ]
      }
    },
    {
      "description": "Landscape image assets",
      "data": {
        "asset_group_id": "images_landscape",
        "asset_type": "image",
        "items": [
          {
            "asset_type": "image",
            "url": "https://cdn.acme.com/hero.jpg",
            "width": 1200,
            "height": 628
          },
          {
            "asset_type": "image",
            "url": "https://cdn.acme.com/hero2.jpg",
            "width": 1200,
            "height": 628
          }
        ]
      }
    }
  ]
}