# Create composite slice

Create a new composite slice that aggregates multiple knowledge slices.

Creates a composite slice that references one or more existing knowledge slices as members. This allows querying across multiple slices as a single unit. Requires the `MANAGE_KNOWLEDGE_SLICES` capability.

#### Path Parameters

**`organization_id`** string required

The unique identifier of the organization (format: `org_*`).

#### Request Body

**`name`** string required

The name of the composite slice (1-255 characters).

**`description`** string optional

A description of the composite slice.

**`member_slice_ids`** array of strings required

List of knowledge slice IDs to include in this composite (minimum 1).

## Returns

The newly created composite slice object (HTTP 201) with `is_composite` set to `true`.

Request

```bash cURL
curl -X POST https://api.aitronos.com/v1/organizations/org_xyz789/knowledge/composites \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "All Engineering Knowledge",
    "description": "Combines backend and frontend docs",
    "member_slice_ids": ["kslice_abc123", "kslice_def456"]
  }'
```


```python Python SDK
from aitronos import Aitronos

client = Aitronos(api_key="your-api-key")

result = client.knowledge.create_composite(
    organization_id="org_xyz789",
    name="All Engineering Knowledge",
    description="Combines backend and frontend docs",
    member_slice_ids=["kslice_abc123", "kslice_def456"],
)
print(result)
```


```python Python
import requests

org_id = "org_xyz789"
url = f"https://api.aitronos.com/v1/organizations/{org_id}/knowledge/composites"
headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN",
    "Content-Type": "application/json",
}
data = {
    "name": "All Engineering Knowledge",
    "description": "Combines backend and frontend docs",
    "member_slice_ids": ["kslice_abc123", "kslice_def456"],
}

response = requests.post(url, headers=headers, json=data)
print(response.json())
```


```javascript JavaScript
const orgId = "org_xyz789";

const response = await fetch(
  `https://api.aitronos.com/v1/organizations/${orgId}/knowledge/composites`,
  {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${accessToken}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      name: "All Engineering Knowledge",
      description: "Combines backend and frontend docs",
      member_slice_ids: ["kslice_abc123", "kslice_def456"],
    }),
  }
);

const data = await response.json();
console.log(data);
```

Response

```json 201 Created
{
  "id": "kslice_comp789",
  "name": "All Engineering Knowledge",
  "description": "Combines backend and frontend docs",
  "type": "standard",
  "is_composite": true,
  "owner_type": "organization",
  "owner_id": "org_xyz789",
  "status": "active",
  "member_slice_ids": ["kslice_abc123", "kslice_def456"],
  "store_count": 0,
  "organization_id": "org_xyz789",
  "created_by": "usr_owner1",
  "created_at": "2025-06-15T10:00:00Z",
  "updated_at": "2025-06-15T10:00:00Z",
  "archived_at": null,
  "archived_by": null
}
```


```json 422 Error
{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "The request contains invalid data.",
    "system_message": "Validation error",
    "type": "client_error",
    "status": 422,
    "details": { "field": "member_slice_ids", "message": "At least one member slice ID is required" },
    "trace_id": "abc-123-def",
    "timestamp": "2025-11-02T08:21:45Z"
  }
}
```

## Related Resources

- [List Composites](/docs/api-reference/knowledge/list-composites)
- [Update Composite](/docs/api-reference/knowledge/update-composite)
- [List Slices](/docs/api-reference/knowledge/list-slices)