> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ApplyPatchServerToolConfig - Python SDK

> ApplyPatchServerToolConfig method reference

<Warning>
  The Python SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues).
</Warning>

Configuration for the openrouter:apply\_patch server tool

## Fields

| Field    | Type                                                                                 | Required             | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | Example |
| -------- | ------------------------------------------------------------------------------------ | -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
| `engine` | [Optional\[components.ApplyPatchEngineEnum\]](../components/applypatchengineenum.md) | :heavy\_minus\_sign: | Which apply\_patch engine to use. "auto" (default) uses native passthrough when the endpoint advertises native apply\_patch support, otherwise falls back to OpenRouter's HITL validator. "native" forces native passthrough — when the endpoint does not support native, the request falls back to HITL. "openrouter" always runs the HITL validator. Native passthrough streams the diff incrementally via `apply_patch_call_operation_diff.delta` events; HITL buffers the diff for atomic delivery as a single delta. | auto    |