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- nex-reply-ai-ext
Works with the AI tools you already use
Nex Reply ai Ext
Deploy a complete Manifest V3 Chrome extension for AI-powered replies in Gmail, Outlook, LinkedIn, and X.
Free
nex-reply-ai-ext
Example session with this skill installed
I need to build a Chrome extension that helps me reply to emails and LinkedIn messages using AI. Use a vanilla JS setup with no build step.
- Read your context and instructions
- Compiled the nex-reply-ai-ext
I've generated the Nex Reply AI extension in assets/extension/. It includes Manifest V3 config, per-site modules for Gmail and LinkedIn, and a background script for Claude API calls. To test, go to chrome://extensions, enable Developer mode, and click 'Load unpacked'.
Connects securely to your tools. The creator never sees your data.
About this skill
The problem
Building a Chrome extension from scratch often means wrestling with Manifest V3 boilerplate, content script injection, and API security. Developers frequently waste days just getting a "no-build" vanilla JS environment to play nice with social media and email DOM selectors.
What it does
- Generates a complete Manifest V3 extension ready to load via 'Load unpacked' in Chrome.
- Provides native integration modules for Gmail, Outlook, LinkedIn, and X (Twitter).
- Implements secure client-side storage for user-provided API keys using XOR-obfuscation.
- Includes a zero-build dev loop using vanilla JS, HTML, and CSS for instant feedback.
- Features background script handling for direct Claude API calls without a middle-tier server.
Frameworks & tools
Chrome Extension Manifest V3, Vanilla JavaScript, Claude API, Chrome Storage API, HTML5, CSS3.
Why this beats prompting it yourself
Prompting usually results in disconnected snippets or broken manifest files. This skill delivers a production-hardened codebase that has actually shipped, including the complex DOM selectors needed to inject UI elements into dynamic web apps like Gmail and LinkedIn.
Use cases
- Deploy a private AI assistant for your team to use across email and social media.
- Fork a working MV3 template to build a custom "action-on-click" browser tool.
- Learn how to handle API calls and key storage in an extension without a backend.
- Rapidly prototype browser-based AI features without setting up Webpack or Vite.
Known limitations
This skill uses a vanilla JS pattern and is not compatible with React, Vue, or modern bundlers. API key obfuscation is for tamper-resistance, not enterprise-grade encryption.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.
- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
Skills folder by agent
Click the path to copy it. Create the folder if it does not exist yet.
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