## 🆕 Production Enhancements Added

### Rate Limiting
- **Limit**: 100 requests per minute per client
- **Strategy**: Fixed window rate limiter
- **Queue**: Up to 10 requests queued
- **Response**: HTTP 429 with retry-after information

### Prometheus Metrics
- **Endpoint**: http://localhost:6001/metrics
- **Metrics Collected**:
  - HTTP request duration and count
  - HTTP client request duration
  - Custom application metrics
- **Format**: Prometheus scraping format
- **Integration**: Works with Grafana, Prometheus, or any monitoring tool

### How to Monitor

**Option 1: Prometheus + Grafana**
```yaml
# Add to docker-compose.yml
prometheus:
  image: prom/prometheus
  ports:
    - "9090:9090"
  volumes:
    - ./prometheus.yml:/etc/prometheus/prometheus.yml
  command:
    - '--config.file=/etc/prometheus/prometheus.yml'

grafana:
  image: grafana/grafana
  ports:
    - "3001:3000"
```

**Option 2: Direct Scraping**
```bash
# View raw metrics
curl http://localhost:6001/metrics

# Example metrics you'll see:
# http_server_request_duration_seconds_bucket
# http_server_request_duration_seconds_count
# http_client_request_duration_seconds_bucket
```

### Rate Limiting Examples

```bash
# Test rate limiting
for i in {1..105}; do
  curl -X POST http://localhost:6001/api/command/executeAgent \
    -H "Content-Type: application/json" \
    -d '{"prompt":"test"}' &
done

# After 100 requests, you'll see:
# {
#   "error": "Too many requests. Please try again later.",
#   "retryAfter": 60
# }
```

### Monitoring Dashboard Metrics

**Key Metrics to Watch:**
- `http_server_request_duration_seconds` - API latency
- `http_client_request_duration_seconds` - Ollama LLM latency
- Request rate and error rate
- Active connections
- Rate limit rejections