tampermonkey

name	tampermonkey
description	Write and debug Tampermonkey userscripts for browser automation, page modification, and web enhancement. Use whenever the user mentions userscripts, Tampermonkey, Greasemonkey, Violentmonkey, or wants to write a script that runs on a website - even if they don't say 'userscript' explicitly. Also trigger for: injecting JavaScript or CSS into web pages, modifying website behaviour, hiding page elements, form auto-fill, scraping page data, intercepting requests, detecting URL changes in SPAs, adding keyboard shortcuts to websites, tab audio control, or TypeScript userscripts. Covers all header tags (@match, @grant, @require, @run-in), GM_* synchronous APIs, GM.* promise-based APIs (recommended for new scripts), batch storage (GM.getValues/setValues v5.3+), binary data support (v5.4+), TypeScript setup via @types/tampermonkey, security sandboxing, and cross-browser compatibility (Chrome, Firefox, Edge). Do NOT use for Selenium/Puppeteer automation, browser extensions (WebExtensions/MV3), or server-side scripts.
allowed-tools	Read, Glob, Grep, Write, Edit

Tampermonkey Userscript Development

Expert guidance for writing Tampermonkey userscripts - browser scripts that modify web pages, automate tasks, and enhance browsing experience.

Quick Start Template

JavaScript (simple scripts with no GM. APIs)*

// ==UserScript==
// @name         My Script Name                    // <- CUSTOMISE: Unique script name
// @namespace    https://example.com/scripts/      // <- CUSTOMISE: Your unique namespace
// @version      1.0.0                             // <- INCREMENT on updates
// @description  Brief description of the script   // <- CUSTOMISE: What it does






(() {
    ;
    
})();