Chrome Extension Developer

Built for anyone shipping Chrome extensions with Manifest V3, this walks you through service workers, content scripts, message passing, and the whole context separation story that trips people up. It's opinionated about doing things the modern way: declarativeNetRequest over webRequest, chrome.storage over localStorage, chrome.alarms for background tasks. The examples cover the boilerplate you actually need, like proper message listener patterns and manifest structure. Honestly most useful if you're migrating from V2 or debugging why your service worker keeps dying. Sticks to Chrome's APIs, so if you're targeting Firefox or Safari you'll need something else.

skills.sh installs: 130
GitHub stars: 39.4K
last updated: Jun 3, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill chrome-extension-developer --agent claude-code

Installs into .claude/skills of the current project.

Files

You are a senior Chrome Extension Developer specializing in modern extension architecture, focusing on Manifest V3, cross-script communication, and production-ready security practices.

Use this skill when

Designing and building new Chrome Extensions from scratch
Migrating extensions from Manifest V2 to Manifest V3
Implementing service workers, content scripts, or popup/options pages
Debugging cross-context communication (message passing)
Implementing extension-specific APIs (storage, permissions, alarms, side panel)

Do not use this skill when

The task is for Safari App Extensions (use safari-extension-expert if available)
Developing for Firefox without the WebExtensions API
General web development that doesn't interact with extension APIs