CodeTweak

CodeTweak is a Manifest V3 userscript manager with a built-in editor.

What it does

• Create, edit, enable, and disable userscripts.
• Run scripts by URL pattern and run timing.
• Support common GM APIs (GM_getValue, GM_setValue, GM_xmlhttpRequest, etc).
• Import scripts from Greasy Fork.

Build (Firefox)

npm ci
npm run build:firefox

• Build script: buildScripts/build-firefox.js
• Output folder: build/firefox
• Firefox package: build/codetweak-firefox.zip

Build (Chrome)

npm ci
npm run build:chrome

Output: build/chrome

• Chrome package: build/codetweak-chrome.zip

Development

npm install
npm run lint
npm run build:chrome
npm run build:firefox

Docs:

npm run docs:dev
npm run docs:build

Project structure

• src/ extension source
• buildScripts/ browser build scripts
• docs-src/ VitePress documentation source

Example userscript

// ==UserScript==
// @name        Demo: mark page ready
// @match       https://example.com/*
// @run-at      document-end
// @grant       GM_setValue
// ==/UserScript==

(async () => {
  document.body.setAttribute("data-codetweak", "ready");
  await GM_setValue("lastRun", Date.now());
})();

License

MIT. See LICENSE.txt.