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scratch-gui

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XMUER Coding Engine is a Scratch editor fork of TurboWarp/scratch-gui maintained by CaelLab, offering an online editor and a Windows desktop client with a built-in XCE Agent block assistant.

XCE-Desktop-4.3.3
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Latest release

XCE-Desktop-4.3.3Oct 22, 2026, 08:32 PM
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README

Project Overview

XMUER Coding Engine is developed and maintained by CaelLab as a Scratch editor fork of TurboWarp/scratch-gui. It keeps the block-based Scratch experience while adopting TurboWarp's high-performance runtime, and ships as both an online editor and a Windows desktop client with projects interchangeable between the two.

Item Value
Upstream TurboWarp/scratch-gui (ultimately from the Scratch Foundation)
Forms Online editor + Windows desktop client
Runtime TurboWarp enhancements (interpolation, 60 FPS)
License AGPL-3.0-only

Online and desktop projects are interchangeable, and offline work keeps going.

Key Features

  • High-performance runtime: TurboWarp interpolation and 60 FPS enhancements carried over
  • XCE Agent assistant: a built-in AI helper that writes blocks and fixes scripts; the desktop version can also read public web pages
  • Two interchangeable forms: projects open in both the online editor and the desktop client
  • Offline desktop: the Windows installer works without a network connection once installed

Download and Usage

  1. Use the online editor directly at engine.xmuer.online with no installation
  2. Grab the Windows 10/11 64-bit installer for the desktop version from the site's desktop download page
  3. Release notes live on the site's desktop changelog page

Local Development

npm install
npm start        # start the dev server
npm run build    # production build, output in build/

Notes

  • License obligations: AGPL-3.0-only; serving a modified version over a network requires opening the corresponding source code
  • Desktop repository: the Windows desktop shell is a separate Electron repository that consumes this repo's build output; the shell code is not here

Release history

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