# Trace Viewer

The [Playwright Trace Viewer](https://playwright.dev/docs/trace-viewer-intro) allows you to review the playback of your test. This can be recorded locally, or downloaded from CI when a test fails.

It is designed for web tests, so while the features like network logging and DOM inspection will not work for Appetize, you can still use it to look at the video recording of the test.

{% code title="playwright.config.ts" %}

```typescript
const config = {
  ...
  use: {
    trace: 'retain-on-failure'
  },
}
```

{% endcode %}


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# Agent Instructions: 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:

```
GET https://docs.appetize.io/testing/trace-viewer.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.