JavaScript Mastery

Not yet reviewedcodingPrompt / Rule# coding # skill # ai

Core JS engine and modern APIs.

Not yet reviewed (manual audit pending)

This skill is cataloged from open community sources and has not yet completed full manual verification. Inspect repository code prior to local execution.

Install JavaScript Mastery in Google Antigravity

Antigravity loads skills from .agents/skills/ in your project or ~/.gemini/config/skills/ for all projects (official docs). Full guide

EasiestOption 1: paste this to your Antigravity agent

Install the "JavaScript Mastery" skill for Google Antigravity.
Follow the steps at https://www.antigravityskills.org/install/javascript-mastery.md (source: https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/javascript-mastery).
Before running anything, show me what you will download and whether it includes scripts, and wait for my OK.
Install it into this project (.agents/skills/) unless I say global. When done, check that Antigravity lists it as an installed skill.

The agent reads the install file, shows you what it will download and waits for your OK.

Option 2: install it yourself

1. Download the skill folder
```
git clone --depth 1 https://github.com/sickn33/antigravity-awesome-skills.git /tmp/ag-skills
```
The skill lives in skills/javascript-mastery/ of the source repository.
2. Copy it into this project (workspace skill)
```
mkdir -p .agents/skills && cp -r /tmp/ag-skills/skills/javascript-mastery .agents/skills/
```
Run from your project root. Antigravity loads workspace skills from .agents/skills/.
3. Or install it for all projects (global skill)
```
mkdir -p ~/.gemini/config/skills && cp -r /tmp/ag-skills/skills/javascript-mastery ~/.gemini/config/skills/
```
Global skills live in ~/.gemini/config/skills/. For the Antigravity CLI use ~/.gemini/antigravity-cli/skills/ instead.
4. Check that Antigravity sees it
Antigravity 2.0 app: start a new conversation and ask "What skills do you have?" (the app has no /skills command; typing / and the skill name also finds it). Antigravity CLI: run /skills; in a session that was already open, run /skills reload first. The agent loads the skill when your request matches its description.

Using Claude Code, Cursor or Codex? See other assistants below.

What is JavaScript Mastery?

33+ essential JavaScript concepts every developer should know, inspired by 33-js-concepts.
Description from the upstream SKILL.md

What the JavaScript Mastery SKILL.md covers

✓Detailed Guide

When to use JavaScript Mastery

1Explaining JavaScript concepts
2Debugging tricky JS behavior
3Teaching JavaScript fundamentals
4Reviewing code for JS best practices
5Understanding language quirks

Source and files

Repository: sickn33/antigravity-awesome-skills (MIT)
Upstream risk label: critical
Added upstream: 2026-02-27
SKILL.md size: 1.3 KB
Files in the skill folder: SKILL.md · references
Listing synced: 2026-10-05 from commit bdacd76

Installation & Setup Guide

Agent Rules / Prompt Setup

RecommendedQuick install command

git clone --depth 1 https://github.com/sickn33/antigravity-awesome-skills.git /tmp/ag-skills && mkdir -p ~/.gemini/config/skills && cp -r /tmp/ag-skills/skills/javascript-mastery ~/.gemini/config/skills/ && rm -rf /tmp/ag-skills

▶Step-by-step install

Step 1: Create skills directory

mkdir -p ~/.gemini/config/skills

Step 2: Clone the skills repository

git clone --depth 1 https://github.com/sickn33/antigravity-awesome-skills.git /tmp/ag-skills

Step 3: Copy this skill

cp -r /tmp/ag-skills/skills/javascript-mastery ~/.gemini/config/skills/

Step 4: Clean up temporary files

rm -rf /tmp/ag-skills

Security Review Status

Not yet reviewed (manual audit pending)

This skill is cataloged from open community sources and has not yet undergone full manual line-by-line security verification by our team.

Recommended Verification Steps Prior to Execution:

Inspect the source repository files before adding to your local AI tool config.
Avoid passing production API credentials or sensitive filesystem permissions unless explicitly required.
Run initial commands inside a sandboxed terminal or container environment.

Source repository link for manual inspection: https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/javascript-mastery

Supported Platforms

antigravityclaudecursor

View Source on GitHub

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