Works with the AI Agents you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIDeepSeekDeepSeekMuseMuse+22 more

    Nex Color Spy Ext

    5

    Fully-functional, zero-build Chrome extension for inspecting CSS colors, fonts, and dimensions with Shadow-DOM.

    Free

    2 usesSecurity scanned
    nex-color-spy-ext

    nex-color-spy-ext

    Example session with this skill installed

    Build me a Chrome extension that lets me hover over any element to see its hex color and font size in a floating window.

    • Read your context and instructions
    • Compiled the nex-color-spy-ext

    I've generated the 'Nex Color Spy' extension in assets/extension/. Key features:

    • Manifest V3 architecture
    • Shadow-DOM isolation for the inspector panel
    • Hotkey toggle (Alt+Shift+I)
    • Hex/Font-size extraction logic
      To install: Load the folder as an 'Unpacked Extension' in Chrome.

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

    About this skill

    Overview

    Nex Color Spy is a production-ready, Manifest V3 Chrome extension designed for designers and front-end developers who need instant access to computed styles. Unlike generic AI scripts, this skill provides the complete source code for a field-tested "overlay" extension that inspects colors, fonts, and box model data in real-time without interfering with page styles.

    What it does

    • Shadow-DOM Overlay: Features a floating inspector panel isolated from host page CSS to ensure consistent UI rendering.
    • Real-time Inspection: Tracks the cursor to report computed hex codes, font families, font sizes, margins, and padding.
    • Zero-Build Architecture: Written in vanilla JS, HTML, and CSS. No Webpack, Vite, or NPM required—just edit and reload.
    • Clipboard Integration: Quick-click functionality to copy any hex code or CSS value directly to the clipboard.

    Why use this skill?

    Prompting an AI to "write an extension" often results in broken background scripts or styling conflicts. This skill delivers a battle-hardened codebase optimized for the MV3 lifecycle. It includes keyboard shortcuts (Alt+Shift+I), storage persistence for settings, and a professional-grade content script that handles complex page layouts effortlessly. Use it to ship a finished tool immediately or as a robust template for your own overlay-based extensions.

    Supported Features

    • Manifest V3 compliant (Service Workers).
    • Isolation via Shadow-DOM.
    • Keyboard-driven toggles and toolbar actions.
    • Ready-to-zip packaging for the Chrome Web Store.

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

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Frontend & Web Apps.

    • No support for canvas or SVG internals.
    • Limited inspection on browser-protected URLs (e.g. Chrome Web Store).
    • Vanilla JS only: no support for React/Vue build steps.

    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 buying a skill.

    Reviews

    No reviews yet

    Be one of the first to try it. Every listed skill goes through the trust checks below.

    Security scanned

    Checked by our 8-point scan before listing

    2 uses

    Times used to date

    Free to use

    No account required to browse

    Trust & safety

    Security scan

    Security scan passed 3 months ago

    • Free with an Agensi account

    Permissions

    Terminal / Shell
    Listed5 months ago
    Updated3 months ago

    What's inside

    Frequently Asked Questions

    You receive the full source code for a Manifest V3 Chrome extension, including the background service worker, the Shadow-DOM content script, and the manifest file, all organized for immediate deployment.

    Installation is simple: download the source files, navigate to chrome://extensions in your browser, enable 'Developer mode', and click 'Load unpacked' to select the folder.

    The extension uses a Shadow-DOM overlay to isolate the inspector UI from the host page's CSS, ensuring the inspection panel looks perfect and doesn't break the layout of the site you are visiting.

    Absolutely. Since it is built with zero-build vanilla JS and HTML, you can easily open the files in any text editor to modify the UI, add new inspection metrics, or change keyboard shortcuts without needing NPM or complex compilers.

    This skill is designed as a standalone codebase that can be managed by any AI agent capable of file manipulation or code analysis, acting as a "Pro-level" starting point that avoids common AI-generated bugs in Manifest V3 scripts.

    The extension provides real-time data on HEX color codes, font families, font sizes, margins, padding, and element dimensions directly as you hover over page elements.

    New in Frontend & Web Apps

    Free