javascript-mastery – Coding skill for AI agents
33+ essential JavaScript concepts every developer should know, inspired by [33-js-concepts](https://github.com/leonardomso/33-js-concepts).
Install the javascript-mastery skill with one command
Pick the tool you use, copy the command and paste it in your terminal. The skill lands in that tool's skills folder and is ready in your next session.
Claude Code
mkdir -p ~/.claude/skills && curl -fsSL https://skill.dn1nguoi.com/z/javascript-mastery-f5f33.tgz | tar xz -C ~/.claude/skills
Call it in Claude Code: /javascript-mastery – then describe the task you want done.
Codex
mkdir -p ~/.codex/skills && curl -fsSL https://skill.dn1nguoi.com/z/javascript-mastery-f5f33.tgz | tar xz -C ~/.codex/skills
Call it in Codex: $javascript-mastery – then describe the task you want done.
Hermes Agent
mkdir -p ~/.hermes/skills && curl -fsSL https://skill.dn1nguoi.com/z/javascript-mastery-f5f33.tgz | tar xz -C ~/.hermes/skills
Call it in Hermes Agent: /javascript-mastery – then describe the task you want done.
DeepSeek
mkdir -p ~/.deepcode/skills && curl -fsSL https://skill.dn1nguoi.com/z/javascript-mastery-f5f33.tgz | tar xz -C ~/.deepcode/skills
Call it in DeepSeek: /javascript-mastery – then describe the task you want done.
SKILL.md content
🧠 JavaScript Mastery
> 33+ essential JavaScript concepts every developer should know, inspired by [33-js-concepts](https://github.com/leonardomso/33-js-concepts).
Detailed Guide
Read [the detailed guide](references/detailed-guide.md) before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.
When to Use This Skill
Use this skill when:
- Explaining JavaScript concepts
- Debugging tricky JS behavior
- Teaching JavaScript fundamentals
- Reviewing code for JS best practices
- Understanding language quirks
---
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
Related skills
- javascript-pro – Master modern JavaScript with ES6+, async patterns, and Node.js APIs. Handles promises…
- javascript-testing-patterns – Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript…
- javascript-typescript-typescript-scaffold – Scaffold TypeScript projects with build tooling, type checking, testing, and…
- jest-skill – Generates Jest unit and integration tests in JavaScript or TypeScript. Covers mocking…
- testrail – Sync tests with TestRail. Use when user mentions "testrail", "test management", "test…
- js-reverse – Front-end JavaScript reverse engineering: locate signature chains, analyze encrypted…
- json-schema-manual – JSON Schema Manual: draft 2020-12 validation schema from a confirmed field list, with…
- junit-5-skill – Generates production-grade JUnit 5 unit and integration tests in Java. Covers…