```astro
---
import 'astro-dev-only';
---

This page won't show up in prod

```

It might make sense to make it a virtual module, so maybe something more like this?

```astro
---
import 'dev:only';
---
```

Start by reviewing the repository's Astro plugin entry points and how imports are handled. Determine whether the requested resource should be the shown `astro-dev-only` import or a `dev:only` virtual module, and consider the work complete when importing it excludes the page from production output while preserving development behavior.

Written by the indexing model from the issue text.