---
title: Internal
description: Preview-only page for internal tools, draft changelogs, and testing utilities.
type: overview
---

<Callout type="warn">
This page is only visible on preview deployments and local development. It does not appear in production.
</Callout>

## Preview package

<PreviewInstall />

## Draft changelogs

Review these changelog entries before publishing them to the Vercel website.

- [Local web UI in Nitro dev](/docs/internal/nitro-web-ui): Unreleased (ships in 5.0.0)
- [Native Nitro v3 bundling for workflows](/docs/internal/nitro-native-build): May 22, 2026
- [Serializable AbortController and AbortSignal](/docs/internal/serializable-abort-controller): March 12, 2026