{
  "openapi": "3.0.3",
  "info": {
    "title": "Contoso synthetic inventory (local exercise only)",
    "version": "1.0.0",
    "description": "Loopback is not reachable from Foundry. For a cloud connection, deploy a separately approved authenticated service and replace the server URL; never tunnel this unauthenticated sample."
  },
  "servers": [{"url": "http://127.0.0.1:8766"}],
  "paths": {
    "/inventory/{sku}": {
      "get": {
        "operationId": "get_stock",
        "description": "Read synthetic stock and unit price. Does not mutate inventory.",
        "parameters": [{
          "name": "sku", "in": "path", "required": true,
          "schema": {"type": "string", "enum": ["NB-14", "MON-27", "KB-01"]}
        }],
        "responses": {
          "200": {
            "description": "Synthetic inventory item",
            "content": {"application/json": {"schema": {
              "type": "object",
              "required": ["sku", "name", "stock", "unit_price_krw", "lead_days", "currency", "synthetic"],
              "properties": {
                "sku": {"type": "string"}, "name": {"type": "string"},
                "stock": {"type": "integer"}, "unit_price_krw": {"type": "integer"},
                "lead_days": {"type": "integer"}, "currency": {"type": "string", "enum": ["KRW"]},
                "synthetic": {"type": "boolean"}
              }
            }}}
          },
          "404": {"description": "Unknown SKU"}
        }
      }
    }
  }
}