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    Nex Page Watch

    6

    Deploy a production-ready Manifest V3 Chrome extension for visual webpage monitoring and change alerts.

    Free

    6 usesSecurity scanned
    nex-page-watch

    nex-page-watch

    Example session with this skill installed

    I need a Chrome extension that alerts me when the price changes on a specific website. Can you provide the source for a page monitor?

    • Read your context and instructions
    • Compiled the nex-page-watch

    I've generated the Nex Page Watch extension in /assets/extension/.

    Key components

    • manifest.json: Manifest V3 config
    • background.js: Alarm-based scheduler
    • diff.js: Visual diffing engine

    To install: Open chrome://extensions, enable Developer Mode, and 'Load unpacked' the folder.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    What it does

    Nex Page Watch is a production-ready Chrome Extension (Manifest V3) that monitors web pages for content changes. It provides a complete, "no-build" codebase using vanilla JS, HTML, and CSS. When a monitored page changes, users receive a browser notification and a detailed visual diff highlighting additions, removals, and word-level modifications.

    Why use this skill

    Unlike basic scaffolding prompts, this skill delivers a fully functional, shipped product. It bypasses the complexity of modern build chains, offering a "Load Unpacked" workflow that is perfect for rapid prototyping or immediate deployment. It solves the architectural challenge of performing heavy diffing operations in an extension by utilizing offscreen documents, ensuring the browser remain responsive.

    Supported architecture & features

    • Manifest V3: Built on the latest Chrome extension standards.
    • Offscreen API: Off-thread processing for performance-intensive diffing.
    • Alarms & Storage: Reliable background scheduling and local data persistence.
    • Vanilla Stack: Zero dependencies—no npm, no Webpack, no Vite.

    The Output

    You receive the complete assets/extension/ source directory containing the manifest, background scripts, content scripts, and UI files. The agent also provides a comprehensive guide on the developer loop, customization, and Web Store packaging steps.

    Built by Nex AI. More skills and info at nex-ai.be and slopsome.com.

    • Local storage only: no cloud sync.
    • Browser based: requires Chrome to be active for background checks.
    • Static diffing: may struggle with highly dynamic SPA content.

    Open docs

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before any payment.

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    Security scanned

    Checked by our 8-point scan before listing

    6 uses

    Times used to date

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    Trust & safety

    Security scan

    Security scan passed 2 months ago

    • Free with an Agensi account

    Permissions

    Terminal / Shell

    File Scopes

    nex-ollama-local-fallback/**
    Listed4 months ago
    Updated12 days ago

    What's inside

    Frequently Asked Questions

    This skill provides a complete, production-ready codebase for a Chrome Extension that tracks web content changes and sends desktop notifications when updates are detected, saving you from building complex monitoring logic from scratch.

    No external build tools like npm, Webpack, or Vite are required; the output uses a 'vanilla' stack (HTML/JS/CSS) designed to be loaded directly into Chrome via 'Load Unpacked' for immediate testing and deployment.

    You receive the full source directory including the Manifest V3 file, background and content scripts, offscreen document logic for performance, and UI files, along with a guide for customization and Web Store packaging.

    Yes, because it uses standard Manifest V3 and vanilla JavaScript, the resulting extension is fully compatible with Google Chrome and other Chromium-based browsers like Microsoft Edge and Brave.

    The skill utilizes Chrome's Offscreen API to handle data-heavy difference calculations (diffing) in a separate thread, ensuring that your browser remains fast and responsive even during intensive monitoring tasks.