**Overview**
This project currently uses Mistral's chat completions API in `app/api/chat/route.ts`.

**Current Configuration**
- Endpoint: `https://api.mistral.ai/v1/chat/completions`
- Model: `mistral-tiny`
- API key (hardcoded in `app/api/chat/route.ts`): `lzWRBwuWxwTGkihMcR4jCicHNpFGiKmA`
- HTTP method: `POST`
- Content-Type: `application/json`

**Where It Lives**
- File: `app/api/chat/route.ts`
- Fetch call location: the `fetch('https://api.mistral.ai/v1/chat/completions', ...)` block.

**Request Shape**
The request payload is built like this:
```json
{
  "model": "mistral-tiny",
  "messages": [
    { "role": "system", "content": "..." },
    { "role": "user", "content": "..." }
  ],
  "max_tokens": 1500,
  "temperature": 0.7
}
```

**Header Shape**
```http
Content-Type: application/json
Authorization: Bearer lzWRBwuWxwTGkihMcR4jCicHNpFGiKmA
```

**Note**
The API key is currently embedded in source code. If you want, I can move it to environment variables (for example `MISTRAL_API_KEY`) and update the code to read from `process.env`.