{
  "openapi": "3.0.3",
  "info": {
    "title": "FaceShapeLens Public Guide API",
    "version": "1.0.0",
    "description": "Read-only lookup API for face shapes, frame geometry formulas, and styling guides"
  },
  "servers": [
    {
      "url": "https://faceshapelens.com"
    }
  ],
  "paths": {
    "/api/agent/lookup": {
      "get": {
        "summary": "Look up face shape characteristics and recommendations",
        "parameters": [
          {
            "name": "shape",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "enum": [
                "oval",
                "round",
                "square",
                "diamond",
                "heart",
                "oblong"
              ]
            },
            "description": "Face shape to look up"
          }
        ],
        "responses": {
          "200": {
            "description": "Successful face shape details",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "shape": {
                      "type": "string"
                    },
                    "eyewearGuideUrl": {
                      "type": "string"
                    },
                    "hairstyleGuideUrl": {
                      "type": "string"
                    },
                    "summary": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}