---
title: "ApplyPatchEngineEnum"
---

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.

## Example Usage

```python
from openrouter.components import ApplyPatchEngineEnum

# Open enum: unrecognized values are captured as UnrecognizedStr
value: ApplyPatchEngineEnum = "auto"
```


## Values

This is an open enum. Unrecognized values will not fail type checks.

- `"auto"`
- `"native"`
- `"openrouter"`