# superlevels-chrome-extension

A skill that lets your agent work on SuperLevels, an open-source Chrome extension bundling tab cleaning, cookie editing, dark mode and custom CSS.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 314 installs · ★ 88
- Author: reason-machines
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/reason-machines/trending-skills/tree/HEAD/skills/superlevels-chrome-extension/SKILL.md
- Updated: 2026-10-09
- HTML: https://affpapa.org/en/nevibecode/skills/superlevels-chrome-extension

## What it does

SuperLevels folds a dozen small browser add-ons into one extension: it closes idle tabs, edits cookies, flips pages to dark mode, toggles JavaScript, dismisses consent banners, edits CSS live, recognizes music and formats JSON. Settings stay in `chrome.storage.local`. Nothing is sent anywhere.

The skill hands the agent a map of the codebase. `manifest.json` is version 3, `popup.html` and `popup.js` drive the toolbar UI, `background.js` runs as a service worker, and `content.js` is injected into pages. Reusable patterns are included too: per-domain keys like `feature_domain`, tab activity tracking in the service worker, and a CSS filter for dark mode that re-inverts images and video. There is no build step, so plain JavaScript loads as is.

One thing to weigh: the manifest asks for `tabs`, `cookies`, `storage`, `scripting`, `webNavigation` and `<all_urls>` access. On a fork you did not write, that is worth a look before you load it.

## Requirements
- Works with: Chrome

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/trending-skills --skill superlevels-chrome-extension -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/superlevels-chrome-extension/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/superlevels-chrome-extension/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/trending-skills --skill superlevels-chrome-extension -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/superlevels-chrome-extension/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/trending-skills --skill superlevels-chrome-extension -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/superlevels-chrome-extension/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install reason-machines/trending-skills superlevels-chrome-extension
```

2. **Manually: put the files in place**
- File: `.github/skills/superlevels-chrome-extension/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/trending-skills --skill superlevels-chrome-extension -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/reason-machines/trending-skills --path skills/superlevels-chrome-extension
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/superlevels-chrome-extension/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add reason-machines/trending-skills --skill superlevels-chrome-extension -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/reason-machines/trending-skills/tree/HEAD/skills/superlevels-chrome-extension/SKILL.md

## When to use it
- close idle tabs after a timeout
- turn on dark mode for one domain
- restyle a site with custom CSS without reloading
- inspect cookies and clear the ones you don't want
- wire a new feature into the popup

## Example prompts
- Add a new feature to SuperLevels and hook it up in `popup.js`
- Configure the tab cleaner to close tabs idle for more than 5 minutes, skipping `github.com`
- Apply dark mode to this domain from `content.js` and persist the setting in `chrome.storage.local`

## Similar
- [chrome-extension-development](https://affpapa.org/en/nevibecode/skills/chrome-extension-development.md) — skill · 2800 installs
- [chrome-extension-dev-js-typescript-cursorrules-pro](https://affpapa.org/en/nevibecode/rules/chrome-extension-dev-js-typescript-cursorrules-pro.md) — rule · ★ 41024
- [chrome-extension](https://affpapa.org/en/nevibecode/skills/chrome-extension.md) — skill · 4500 installs
- [chrome-extension-ui](https://affpapa.org/en/nevibecode/skills/chrome-extension-ui.md) — skill · 719 installs
- [chrome-extensions](https://affpapa.org/en/nevibecode/skills/chrome-extensions.md) — skill · 11000 installs
- [browser-extension-builder](https://affpapa.org/en/nevibecode/skills/sickn33-browser-extension-builder.md) — skill · 2000 installs

From the same set: [reason-machines/trending-skills](https://affpapa.org/en/nevibecode/by/reason-machines/trending-skills.md) — 186 cards

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md