A JavaScript quality-check workflow using ESLint, Prettier, Jest, or Vitest. It checks code for common problems, consistent formatting, and passing automated tests.

Use it to check JavaScript projects with ESLint, Prettier, Jest, or Vitest.

It brings linting, formatting, and test checks together and makes zero-error results the target.

js-quality — Skill for Claude Code by morodomi

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add morodomi/dev-crew --skill js-quality

Clone the repo

git clone --depth 1 https://github.com/morodomi/dev-crew

Made for: Claude Code.

Or install dev-crew, the plugin that ships this one along with the rest of its 28 skills, 40 agents, 3 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/morodomi/dev-crew/js-quality/github.svg)](https://agentmods.dev/skills/morodomi/dev-crew/js-quality)

Your own site

<a href="https://agentmods.dev/skills/morodomi/dev-crew/js-quality"><img src="https://agentmods.dev/badge/skills/morodomi/dev-crew/js-quality/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/morodomi/dev-crew/js-quality"><img src="https://agentmods.dev/badge/skills/morodomi/dev-crew/js-quality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 159 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00048	$0.00159
Opus 5	$0.00024	$0.00079
Sonnet 5	$0.00010	$0.00032
Haiku 4.5	$0.00005	$0.00016

Measured 5d ago against content hash f70770acedea, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

js-quality scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/js-quality/SKILL.md · 20 lines

What it actually says

Tools

lint: npx eslint | format: npx prettier --check | test: npx jest / npx vitest run

Standards

項目	目標
ESLint	エラー0
Prettier	エラー0
カバレッジ	90%+

Reference

reference.md

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

reference.md 1.9 KB

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

5d ago First seen · 20 lines · 48 tokens per session scan A f70770acedea

Subscribe to this mod's changes

js-quality is a skill published in the GitHub repository morodomi/dev-crew (1 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 159 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Claude Code Languages TDD Testing Unit testing ai-agents claude-code-plugin developer-tools

Test Scaffold (Laravel/PHPUnit)

Generate PHP/Laravel (PHPUnit) test skeletons from specifications.

s977043/river-review · 23 tokens

Unit Test Scaffold (Python/pytest)

Generate Python/pytest unit test skeletons from specifications.

s977043/river-review · 19 tokens

Unit Test Scaffold (TypeScript)

Generate TypeScript unit test skeletons (Jest/Vitest) from specifications.

s977043/river-review · 23 tokens

dhpk-pytest-async

Async pytest + pytest-asyncio testing: asynciomode=auto, SQLite fixtures, httpx.AsyncClient + ASGITransport, unit/integration split, coverage floor, live markers. Use when writing or reviewing async FastAPI/SQLAlchemy tests, or enforcing dhpk-tdd-workflow. Not for production code. Output: offline-green async tests.

hmj1026/dhpk · 79 tokens

perl-testing

Perl testing patterns using Test2::V0, Test::More, prove runner, mocking, coverage with Devel::Cover, and TDD methodology.

Jamkris/everything-gemini-code · 35 tokens

cpp-testing

Use only when writing/updating/fixing C++ tests, configuring GoogleTest/CTest, diagnosing failing or flaky tests, or adding coverage/sanitizers.

Jamkris/everything-gemini-code · 34 tokens