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Agent skill

Javascript Tooling

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Configure development tools, linting, formatting, and test runners for existing JavaScript projects.

MITAuto-check passedDevelopment

Install Javascript Tooling

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill javascript-tooling -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard javascript-tooling --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/javascript/javascript-tooling .claude/skills/javascript-tooling && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
javascript-tooling
GitHub stars
571
Token cost
~446 tokens
SKILL.md length
107 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Configure development tools, linting, formatting, and test runners for existing JavaScript projects.

  • Equivalent tool setup
  • SKILL.md covers Priority: P1 (HIGH), Implementation Guidelines, Anti-Patterns and Configuration, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Defer application implementation and generic project scaffolding

What it does

Javascript Tooling is an agent skill from HoangNguyen0403/agent-skills-standard. Configure development tools, linting, formatting, and test runners for existing JavaScript projects. Use for ESLint, Prettier, Jest, or equivalent tool setup; defer application implementation and generic project scaffolding.

Its SKILL.md is about 450 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/REFERENCE.md`).

It sits in Development, covering Linting and formatting and Unit testing. It works with JavaScript, Prettier, ESLint and Jest. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Equivalent tool setup
  • Defer application implementation and generic project scaffolding

Example prompts

  • “/javascript-tooling”

What it can do on your machine

Read from SKILL.md and the folder at commit 266fd75. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are javascript and json).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Javascript Tooling loads about 446 tokens when it runs, and up to ~1.1k if it reads all its reference files. Until then it costs about 61 tokens; SKILL.md has 107 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~61
When it runs · the whole SKILL.md, loaded when a task matches
~446
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit 266fd75, republished under its MIT licence (© HoangNguyen0403). 107 words, ~446 tokens.

Download SKILL.mdSave it as .claude/skills/javascript-tooling/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
javascript-tooling
description
Configure development tools, linting, formatting, and test runners for existing JavaScript projects. Use for ESLint, Prettier, Jest, or equivalent tool setup; defer application implementation and generic project scaffolding.

JavaScript Tooling

Priority: P1 (HIGH)

Implementation Guidelines

Start tooling recommendations with the applicable Priority and then state the formatting tool and enforcement point.

  • Linting: ESLint (Rec + Prettier). Fix on save.
  • Formatting: Prettier. Run on save/commit.
  • Testing: Jest/Vitest. Co-locate tests. >80% cov.
  • Build: Vite (Apps), Rollup (Libs).
  • Pkg Manager: Sync versions (npm/yarn/pnpm).

Anti-Patterns

  • No Formatting Wars: Prettier rules.
  • No Untested Code: TDD/Post-code tests.
  • No Dirty Commits: Lint before push.

Configuration

javascript
// .eslintrc.js
module.exports = {
  extends: ['eslint:recommended', 'prettier'],
  rules: { 'no-console': 'warn', 'prefer-const': 'error' },
};
json
// .prettierrc
{ "semi": true, "singleQuote": true, "printWidth": 80 }
javascript
// jest.config.js
export default {
  coverageThreshold: { global: { lines: 80 } },
};

Reference & Examples

For testing patterns and CI/CD: See references/REFERENCE.md.

best-practices | language

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • Pkg Manager
  • Priority
  • Testing

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/javascript/javascript-tooling of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/REFERENCE.md

Open the folder on GitHubat commit 266fd75

Compare with similar skills

Javascript Tooling next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Javascript Tooling compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Javascript Tooling this skillHoangNguyen0403/agent-skills-standard571—~446Automated safety check: PassMIT
Typescript Rulessoftspark/ai-toolkit179—~2.7kAutomated safety check: NotesApache-2.0
Code Qualityredis/RedisInsight8.9k—~1.2kAutomated safety check: PassCustom licence
JavaScript ProJeffallan/claude-skills12k—~1.2kAutomated safety check: PassMIT
Typescript Tooling MigrationArize-ai/phoenix12k—~2.8kAutomated safety check: PassApache-2.0
AntfuJetBrains/skills3664 repos~1kAutomated safety check: PassNone

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  • Typescript Rules

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    Code-quality standards for RedisInsight: TypeScript strictness, naming conventions (camelCase, PascalCase, UPPERSNAKECASE), linting rules, no any without reason, no !important in styles, and…

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Works with

Categories

Questions about Javascript Tooling

What does Javascript Tooling do?

Configure development tools, linting, formatting, and test runners for existing JavaScript projects. Javascript Tooling is an agent skill from HoangNguyen0403/agent-skills-standard. Configure development tools, linting, formatting, and test runners for existing JavaScript projects.

When should I use Javascript Tooling?

Javascript Tooling fits situations like: equivalent tool setup; defer application implementation and generic project scaffolding.

How do I install Javascript Tooling in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill javascript-tooling -a claude-code`. Or copy the skill folder (skills/javascript/javascript-tooling in HoangNguyen0403/agent-skills-standard) into .claude/skills/javascript-tooling in your project. Claude Code loads it when a task matches its description.

How do I install Javascript Tooling in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill javascript-tooling -a codex`. Or copy the skill folder (skills/javascript/javascript-tooling in HoangNguyen0403/agent-skills-standard) into .agents/skills/javascript-tooling in your project. Codex loads it when a task matches its description.

Can I use Javascript Tooling in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill javascript-tooling -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/javascript-tooling, .gemini/skills/javascript-tooling, .github/skills/javascript-tooling and .opencode/skills/javascript-tooling in your project.

What does Javascript Tooling need to run?

SKILL.md names no scripts, command-line tools or credentials: Javascript Tooling is instructions for the agent only.

Does Javascript Tooling access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Javascript Tooling safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Javascript Tooling use?

Javascript Tooling is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Javascript Tooling use?

About 446 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 614 tokens, read only when the agent opens those files.

What are the alternatives to Javascript Tooling?

Skills that share tags, products or a category with Javascript Tooling: Typescript Rules (softspark/ai-toolkit, 179 stars), Code Quality (redis/RedisInsight, 8.9k stars), JavaScript Pro (Jeffallan/claude-skills, 12k stars) and Typescript Tooling Migration (Arize-ai/phoenix, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Javascript Tooling?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 571 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.