# sanitize_hook_environ

> **Function** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/hooks/env/sanitize_hook_environ)

Build an inherited environment safe to pass to hook subprocesses.

Strips values whose names look like secrets. Hooks are user-authored trusted
code, but secret values should not be ambiently available.

## Signature

```python
sanitize_hook_environ(
    source: Mapping[str, str] | None = None,
) -> dict[str, str]
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `source` | `Mapping[str, str] \| None` | No | Environment to sanitize. Defaults to `os.environ`. (default: `None`) |

## Returns

`dict[str, str]`

A new environment mapping suitable for `asyncio.create_subprocess_shell`.

---

[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/e4c1ffe9ee63d7854147de490ca27495ef157a7b/libs/code/deepagents_code/hooks/env.py#L18)