{
  "title": "Zestful Ingredient Structure",
  "description": "Document structure for a parsed ingredient from the Zestful API.",
  "type": "object",
  "fields": [
    {
      "name": "ingredientRaw",
      "type": "string",
      "required": true,
      "description": "Original unparsed ingredient string"
    },
    {
      "name": "ingredientParsed",
      "type": "object",
      "required": true,
      "description": "Structured parse result",
      "fields": [
        { "name": "quantity", "type": "number|null", "required": false, "description": "Numeric quantity" },
        { "name": "unit", "type": "string|null", "required": false, "description": "Measurement unit (singular)" },
        { "name": "productSizeModifier", "type": "string|null", "required": false, "description": "Size descriptor" },
        { "name": "product", "type": "string", "required": true, "description": "Purchasable item name" },
        { "name": "preparationNotes", "type": "string|null", "required": false, "description": "Preparation instructions" },
        {
          "name": "usdaInfo",
          "type": "object|null",
          "required": false,
          "description": "USDA FoodData Central match",
          "fields": [
            { "name": "fdcId", "type": "string", "required": false, "description": "USDA FDC ID" },
            { "name": "matchMethod", "type": "string", "required": false, "description": "Match method: exact, closestUnbranded, closestBranded" },
            { "name": "category", "type": "string", "required": false, "description": "USDA food category" },
            { "name": "description", "type": "string", "required": false, "description": "USDA food description" }
          ]
        }
      ]
    },
    { "name": "confidence", "type": "number", "required": true, "description": "Parse confidence (0.0–1.0)" },
    { "name": "error", "type": "string|null", "required": false, "description": "Parse error if any" }
  ]
}