Are the scripts compatible with Greasemonkey or Violentmonkey?

Yes, the skill focuses on cross-browser compatibility and standard GM_ APIs that work across most major userscript managers.

Does it support modern Single Page Applications (SPAs)?

Yes, it includes specific patterns for detecting URL changes in SPAs using the onurlchange event or MutationObservers for dynamic content.

How does it handle security and CORS issues?

The skill provides guidance on using GM_xmlhttpRequest to bypass standard CORS limitations and includes a security checklist for sanitizing user input.

Can I use this to store data across browser sessions?

Absolutely. The skill provides implementation patterns for GM_setValue and GM_getValue to persist user preferences and data locally.

Does this skill handle metadata headers automatically?

Yes, it automatically generates the necessary @match, @grant, @namespace, and @run-at headers to ensure your script runs correctly in the intended environment.

Tampermonkey Userscript Builder

Name: Tampermonkey Userscript Builder
Author: henkisdabro

byhenkisdabro

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Browser Automation

Develops custom Tampermonkey userscripts for browser automation, UI modifications, and web feature enhancement.

About

This skill empowers Claude to act as a senior userscript engineer, providing precise metadata headers, handling complex DOM mutations via MutationObservers, managing persistent state through GM_* APIs, and ensuring cross-browser compatibility. It is designed for developers who need to automate repetitive web tasks, inject custom functionality into third-party websites, or intercept network requests without the overhead of building full browser extensions. By following standardized patterns and security checklists, it ensures that generated scripts are performant, secure, and easy to maintain across various browser environments.

Key Features

Implementation of persistent storage using synchronous and asynchronous GM storage APIs
Built-in support for Single Page Application (SPA) URL change detection
Cross-origin request handling via GM_xmlhttpRequest and secure @connect configurations
14 GitHub stars
Robust DOM manipulation patterns including element waiting and MutationObservers
Automated generation of standardized userscript metadata headers (@match, @grant, @run-at)

Use Cases

Automating repetitive data entry or form filling across complex web applications
Injecting custom CSS or UI elements to improve the layout and accessibility of third-party dashboards
Scraping web data and intercepting network requests for local data processing and analysis

About

Key Features

Implementation of persistent storage using synchronous and asynchronous GM storage APIs
Built-in support for Single Page Application (SPA) URL change detection
Cross-origin request handling via GM_xmlhttpRequest and secure @connect configurations
14 GitHub stars
Robust DOM manipulation patterns including element waiting and MutationObservers
Automated generation of standardized userscript metadata headers (@match, @grant, @run-at)

Use Cases

Automating repetitive data entry or form filling across complex web applications
Injecting custom CSS or UI elements to improve the layout and accessibility of third-party dashboards
Scraping web data and intercepting network requests for local data processing and analysis