> ## 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.

# System

## Supported Types

### `str`

```python theme={null}
value: str = /* values here */
```

### `List[components.AnthropicTextBlockParam]`

```python theme={null}
value: List[components.AnthropicTextBlockParam] = /* values here */
```