### RandomInt / AreaBalanced

**Area-balanced** — strong predominance of small values.  
Ideal for vein radii — mostly small, rarely large.

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `type` | string | ✅ Yes | **`AreaBalanced`** |
| `min` | int | ✅ Yes | Minimum value |
| `max` | int | ✅ Yes | Maximum value |

**Example:**
```json
{
  "type": "AreaBalanced",
  "min": 2,
  "max": 48
}
// Frequent: 2-8, rare: 9-48