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

# Testing and documentation

> Check code, preview docs, and maintain visual assets.

## Application checks

```sh theme={null}
npm run check
npm run build
```

Use the provider smoke harness only when the required provider credential is available.

## Preview the docs

```sh theme={null}
npm run docs
```

Mintlify runs on port 3333. Check navigation, redirects, internal links, code samples, and responsive layout.

## Capture visual assets

```sh theme={null}
npm run docs:assets:structural
npm run docs:assets:verify
```

Credentialed scenarios use `npm run docs:assets:agent`. Video and GIF generation also require `ffmpeg`.

The asset manifest in `docs/images/README.md` records the owning page, scenario, viewport, credentials, and filename.

## Maintain the feature catalog

Run `npm run docs:catalog` after changing the catalog source. Run `npm run docs:validate` to require one target page for every feature and to check that every target page exists.