{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Grocery & CPG Product",
  "description": "Schema for grocery and consumer packaged goods (CPG) product listings.",
  "type": "object",
  "properties": {
    "product_name": {
      "type": "string",
      "description": "Name of the grocery or CPG product. Commonly found in: product page h1, product card title, og:title meta tag."
    },
    "brand": {
      "type": "string",
      "description": "Brand name of the product. Commonly found in: brand field in product details, product byline, package brand label."
    },
    "upc": {
      "type": "string",
      "description": "Universal Product Code (UPC/EAN barcode). Commonly found in: product details table, product ID field, barcode data."
    },
    "platform": {
      "type": "string",
      "description": "E-commerce platform or grocery delivery app. Commonly found in: site domain, platform branding, app name."
    },
    "store_name": {
      "type": "string",
      "description": "Physical or online store name. Commonly found in: store name header, retailer branding, sold by field."
    },
    "price": {
      "type": "number",
      "description": "Current price of the product. Commonly found in: price display, product price span, JSON-LD price field."
    },
    "unit_price": {
      "type": "number",
      "description": "Price per unit of measure (e.g., per oz, per count). Commonly found in: unit price display, per oz price label, price per unit section."
    },
    "unit_of_measure": {
      "type": "string",
      "description": "Unit of measure for unit pricing (e.g., oz, lb, count). Commonly found in: unit price label, product weight field, package size indicator."
    },
    "sale_price": {
      "type": "number",
      "description": "Sale or discounted price. Commonly found in: sale price display, discount label, was/now price display."
    },
    "availability": {
      "type": "string",
      "enum": ["in_stock", "out_of_stock", "limited", "other"],
      "description": "Current availability status. Commonly found in: availability badge, in stock indicator, add to cart button state."
    },
    "category": {
      "type": "string",
      "description": "Primary product category (e.g., Dairy, Snacks, Beverages). Commonly found in: breadcrumb navigation, category field, aisle label."
    },
    "subcategory": {
      "type": "string",
      "description": "Product subcategory. Commonly found in: breadcrumb navigation, subcategory field, aisle sub-label."
    },
    "weight_oz": {
      "type": "number",
      "description": "Product weight in ounces. Commonly found in: product size/weight field, package label, product details table."
    },
    "calories": {
      "type": "number",
      "description": "Calories per serving. Commonly found in: nutrition facts label, calories per serving display, nutritional info section."
    },
    "ingredients": {
      "type": "string",
      "description": "Ingredients list as a string. Commonly found in: ingredients section, product label ingredients, nutrition tab."
    },
    "allergens": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "List of allergens present or may contain. Commonly found in: allergen section, contains/may contain labels, product warning section."
    },
    "nutritional_info": {
      "type": "object",
      "description": "Key nutritional values per serving. Commonly found in: nutrition facts panel, nutritional information section, nutrition tab.",
      "properties": {
        "fat": {
          "type": "number",
          "description": "Total fat in grams."
        },
        "carbs": {
          "type": "number",
          "description": "Total carbohydrates in grams."
        },
        "protein": {
          "type": "number",
          "description": "Protein in grams."
        },
        "sodium": {
          "type": "number",
          "description": "Sodium in milligrams."
        },
        "sugar": {
          "type": "number",
          "description": "Total sugars in grams."
        },
        "fiber": {
          "type": "number",
          "description": "Dietary fiber in grams."
        }
      }
    },
    "certifications": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Certifications or labels (e.g., Organic, Non-GMO, Gluten-Free). Commonly found in: certification badges, product label certifications, filter tags."
    },
    "images": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "description": "URLs of product images. Commonly found in: product image gallery, image carousel, og:image meta tag."
    },
    "description": {
      "type": "string",
      "description": "Product description text. Commonly found in: product description section, about this item, product overview."
    },
    "page_title": {
      "type": "string",
      "description": "Title of the source page. Tabstack auto-fills this from page metadata when left empty."
    },
    "favicon": {
      "type": "string",
      "format": "uri",
      "description": "Favicon URL of the source page. Tabstack auto-fills this from page metadata when left empty."
    }
  },
  "required": ["product_name", "platform", "price", "availability"]
}