npm

npm is a skill for Claude Code, Codex from dhaupin/vant. It costs 7 tokens per session (353 once invoked), scanned A, original, MIT.

A package manager for Node.js, the software platform used to run JavaScript outside a web browser. It installs project libraries, runs commands defined in package.json, and starts or builds applications.

In plain words
What is it for?
Use it to install packages, add development tools, run development or test scripts, start applications, and create production builds.
Why use it?
It keeps a project's dependencies and repeatable development commands in one place instead of requiring manual installation and tracking.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to install packages, add development tools, run development or test scripts, start applications, and create production builds.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dhaupin/vant/vant-skill-npm
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 dhaupin/vant --skill vant-skill-npm
Clone the repo
git clone --depth 1 https://github.com/dhaupin/vant

Made for: Claude Code, Codex.

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.

agentmods badge for npm

README.md
[![agentmods](https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-npm.svg)](https://agentmods.dev/skills/dhaupin/vant/vant-skill-npm)
Your own site
<a href="https://agentmods.dev/skills/dhaupin/vant/vant-skill-npm"><img src="https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-npm.svg" alt="Measured on agentmods" height="20"></a>
Per session 7 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 353 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00007 $0.00353
Opus 5 $0.00003 $0.00177
Sonnet 5 $0.00001 $0.00071
Haiku 4.5 $0.00001 $0.00035

Measured 7d ago against content hash 45adb2ed4032, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

npm 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 7d 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.

models/public/skills/vant-skill-npm/SKILL.md · 98 lines

What it actually says

NPM

Node.js package manager.


When To Use

  • package.json exists
  • node_modules present
  • JavaScript/TypeScript projects

What To Do

1. Common Commands

Command What
npm install Install deps
npm add Add package
npm run Run scripts
npm test Run tests
npm start Start app
npm build Build

2. Install

# Install all deps
npm install

# Add package
npm install lodash
npm install --save-dev typescript

# Global
npm install -g typescript

3. Run Scripts

npm run dev
npm run build
npm run test

4. Package.json

{
  "scripts": {
    "dev": "vite",
    "build": "vite build",
    "test": "jest"
  },
  "dependencies": {
    "lodash": "^4.0.0"
  },
  "devDependencies": {
    "typescript": "^5.0.0"
  }
}

Output

## NPM

| Package | Version | Type |
|---------|---------|------|
| [name] | [version] | [dep/devDep] |

### Scripts
- [list]

Role: NPM Manager
Input: package.json
Output: Dependencies

Node packages.

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.

  1. 7d ago First seen · 98 lines · 7 tokens per session scan A 45adb2ed4032

Subscribe to this mod's changes

npm is a skill published in the GitHub repository dhaupin/vant (9 stars, last pushed 8d ago), licensed MIT. It adds 7 tokens to every session and 353 once invoked, about $0.0000 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 2026-08-31.

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