### 🏗️ **Architecture Overview: Structured Summary Generation System (Vertex AI Only)**

```
+-------------------+         +-------------------+         +--------------------+
|                   |         |                   |         |                    |
|  Macy’s Systems   +-------->+   API Gateway /   +-------->+   Summarization    |
|  (Client Systems) |  JSON   |  Backend Service  |  JSON   |   Engine & Router  |
|                   | Request |                   | Payload |                    |
+-------------------+         +-------------------+         +--------------------+
                                                                 |
                                                                 |
                                                    +------------+------------+
                                                    |                         |
                                                    ▼                         ▼
                                        +----------------------------+
                                        | Vertex AI (Gemini Model)   |
                                        | via Text Generation API    |
                                        +----------------------------+
                                                    |
                                                    ▼
                                  +----------------------------------+
                                  |  Structured Summary (JSON)       |
                                  |  Final outcome, events, notes,   |
                                  |  evidence — per prompt type      |
                                  +----------------------------------+
                                                    |
                                                    ▼
                                  +-------------------------------+
                                  |   API Response Formatter      |
                                  |   (Standardized JSON Output)  |
                                  +-------------------------------+
                                                    |
                                                    ▼
                                  +-------------------------------+
                                  |     Response to Macy’s API     |
                                  +-------------------------------+
```

---

### 🧩 **Component Breakdown (Vertex AI Only)**

#### **1. Macy’s Systems (Source)**

* Initiates API requests for:

  * **Order Summaries**
  * **Notes Summaries**
  * **Product Summaries**
* Sends a `summary_type` flag in the JSON payload.

#### **2. API Gateway / Backend Service**

* Receives and validates API calls.
* Identifies `summary_type` and routes accordingly.

#### **3. Summarization Engine & Router**

* Prepares prompt templates.
* Converts input JSON into structured input for Gemini.
* Routes request to **Vertex AI Gemini** via text generation endpoint.

#### **4. Vertex AI (Gemini Model)**

* Processes inputs with a tailored, structured prompt.
* Returns markdown-like or JSON-formatted summaries with fields like:

  * `final_outcome`
  * `critical_events`
  * `key_notes`
  * `order_timeline_overview`
  * `key_evidence`

  *(Or notes/product-specific fields as needed)*

#### **5. Response Formatter**

* Parses and normalizes model output.
* Structures final JSON according to Macy’s API schema.

#### **6. API Response**

* Sends summary response back to Macy’s system.
* Ready for use in dashboards, internal tools, or automation.

---

### 🛠️ **Tech Stack Summary (Vertex AI Only)**

| Layer                 | Technology Options                          |
| --------------------- | ------------------------------------------- |
| API Gateway           | FastAPI / Express / GCP API Gateway         |
| Backend Service       | Python / Node.js                            |
| Model Invocation      | Vertex AI (Gemini) via REST or SDK          |
| Prompt Templates      | Stored as YAML/JSON, version-controlled     |
| Response Handling     | Custom formatters or transformers           |
| Deployment            | GKE / Cloud Run / App Engine                |
| Security & Monitoring | OAuth2, IAM, Cloud Logging, Error Reporting |

---

Would you like a **visual diagram** of this architecture? I can generate a clean image for you to drop into documentation or slides. can you add in fututre we can levrage to vector db for any thing you think best other keep that same just think where we can add any db types