{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "sku": {
      "type": "string",
      "pattern": "^SKU-[A-Z0-9]{4,12}$"
    }
  },
  "required": [
    "sku"
  ]
}