# Graph with Reflect and Rewrite Nodes

This project demonstrates how to integrate an LLM (OpenAI) into a simple graph structure using the `langchain-core` package. The graph contains two nodes:

1. **Reflect** – Generates a reflective response to an input message.
2. **Rewrite** – Rewrites the reflected message into a concise, formal style.

## Prerequisites

- Node.js (v18 or newer)
- An OpenAI API key

## Setup

```bash
# Clone the repository
git clone https://github.com/your-username/graph-reflect-rewrite.git
cd graph-reflect-rewrite

# Install dependencies
npm install
```

## Configuration

Set your OpenAI API key as an environment variable:

```bash
export OPENAI_API_KEY=your_api_key_here
```

On Windows (Command Prompt):

```cmd
set OPENAI_API_KEY=your_api_key_here
```

On Windows (PowerShell):

```powershell
$env:OPENAI_API_KEY="your_api_key_here"
```

## Running the Example

```bash
npm start
```

You should see output similar to:

```
--- Input Message ---
I am feeling overwhelmed with my workload and unsure how to prioritize tasks.
---------------------

--- Final Output ---
I have taken a moment to reflect on your situation. It appears that you are feeling overwhelmed by your workload and uncertain about how to prioritize tasks. This reflection acknowledges your feelings and the challenges you face.

I have rewritten the reflection in a concise and formal style:
I have taken a moment to reflect on your situation. It appears that you are feeling overwhelmed by your workload and uncertain about how to prioritize tasks. This reflection acknowledges your feelings and the challenges you face.
---------------------
```

## Project Structure

- `src/index.js` – Entry point that builds and runs the graph.
- `src/graph.js` – Simple graph implementation.
- `src/nodes/reflect.js` – Reflect node implementation.
- `src/nodes/rewrite.js` – Rewrite node implementation.

## Extending the Graph

You can add more nodes by creating new modules in `src/nodes/` and adding them to the graph in `src/index.js`. Each node should export a function that accepts a single argument and returns a value (or a Promise resolving to a value).

## License

MIT License
---END