> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ContainerFileSource

Container files are always produced by the assistant sandbox.

## Example Usage

```typescript theme={null}
import { ContainerFileSource } from "@openrouter/sdk/models";

let value: ContainerFileSource = "assistant";
```

## Values

```typescript theme={null}
"assistant"
```