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

# Edit file fast

> Merge a large or fuzzy rewrite into a text file using a fast apply LLM.

{/* Tool: edit_file_llm */}

## Parameters

<ParamField path="target_file" type="string" required={true}>
  Absolute path of the file to edit.
</ParamField>

<ParamField path="code_edit" type="string" required={true}>
  Specify ONLY the precise lines of code that you wish to edit. Use // ... existing code ... for unchanged sections.
</ParamField>

<ParamField path="instructions" type="string" default={""}>
  Optional. A single sentence in the first person describing what you're changing (e.g. 'I am adding error handling to the fetch call'). Helps disambiguate the edit; omit it for unambiguous edits.
</ParamField>