# Update Collection

Update collection details.

**Endpoint**: `PUT /api/collections/{id}`
**Auth**: Required
**Content-Type**: `application/json`

## Path Parameters

| Parameter | Type | Required | Description |
|-----------|------|-----------|-------------|
| id | string (UUID) | Yes | Collection UUID |

## Request Body

All fields are optional. Include only fields you want to update.

| Field | Type | Required | Description |
|--------|------|-----------|-------------|
| name | string | No | Collection name (max 255 chars) |
| description | string | No | Collection description |
| color | string | No | Hex color code (e.g., "#FF5733") |
| icon | string | No | Emoji icon (e.g., "🚀", "📖") |
| auto_assign_rules | array | No | Array of rule objects (replaces existing rules) |
| view_settings | object | No | Per-device display preferences |

### Example Request

```json
{
  "name": "Sci-Fi Favorites",
  "description": "Updated description",
  "color": "#7aa2f7",
  "icon": "🌟"
}
```

## Response (200 OK)

```json
{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "name": "Sci-Fi Favorites",
  "description": "Updated description",
  "color": "#7aa2f7",
  "icon": "🌟",
  "auto_assign_rules": [],
  "view_settings": {},
  "created_at": "2026-02-01T10:00:00Z"
}
```

## Error Responses

| Code | Description |
|------|-------------|
| 400 | Invalid request (validation failed) |
| 401 | Authentication required |
| 404 | Collection not found |
| 500 | Internal server error |

## Try It Out
