> For the complete documentation index, see [llms.txt](https://docs.riff.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.riff.ai/reference/app-builder/code-editor.md).

# Code Editor

The Code Editor shows the full source code of your app in a two-column layout. The Riff agent writes and edits code on your behalf through chat — the Code Editor is there for the times you need to look directly at the code or make a change yourself.

## Layout

**Left panel (file tree)** — a hierarchical list of all files in your project, organised into folders (frontend files, backend files, and so on).

**Right panel (editor)** — the contents of the selected file, with syntax highlighting.

Click any file in the left panel to open it in the editor. Edit directly in the editor when needed.


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# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.riff.ai/reference/app-builder/code-editor.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.