npm-scripts

An assistant for creating, changing, explaining, improving, and troubleshooting npm scripts in package.json. npm is a tool commonly used to install JavaScript packages and run project commands.

In plain words
What is it for?
Use it for build commands, development servers, tests, linting, formatting, type checking, deployment, database migrations, code generation, environment setup, and Git hooks.
Why use it?
It helps make project commands easier to understand, more portable, and more reliable to run.

Command for Claude Code

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.

agentmods
npx agentmods add commands/justdvp/claude-code-templates/npm-scripts
Clone the repo
git clone --depth 1 https://github.com/Justdvp/claude-code-templates

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 300 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00300
Opus 5 $0.00000 $0.00150
Sonnet 5 $0.00000 $0.00060
Haiku 4.5 $0.00000 $0.00030

Measured 2d ago against content hash 96b6b4b6c174, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

npm-scripts 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 2d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

cli-tool/templates/javascript-typescript/.claude/commands/npm-scripts.md · 48 lines

What it actually says

NPM Scripts Assistant

Help me with NPM scripts: $ARGUMENTS

Task

I'll help you work with package.json scripts by:

  1. Analyzing existing npm scripts in your project
  2. Creating new scripts or modifying existing ones
  3. Explaining what specific scripts do
  4. Suggesting improvements or optimizations
  5. Troubleshooting script execution issues

Process

I'll follow these steps:

  1. Examine your package.json file to understand current scripts
  2. Analyze dependencies and devDependencies for available tools
  3. Identify common patterns and conventions in your scripts
  4. Implement requested changes or create new scripts
  5. Provide explanations of how the scripts work
  6. Test scripts when possible to verify functionality

Common Script Types I Can Help With

  • Build processes (webpack, rollup, esbuild, etc.)
  • Development servers and hot reloading
  • Testing (unit, integration, e2e)
  • Linting and code formatting
  • Type checking
  • Deployment and CI/CD
  • Database migrations
  • Code generation
  • Environment setup
  • Pre/post hooks for git operations

Script Optimization Techniques

  • Parallelizing tasks for faster execution
  • Adding cross-platform compatibility
  • Improving error reporting and logging
  • Implementing watch modes for development
  • Creating composite scripts for common workflows
  • Adding appropriate exit codes for CI/CD pipelines

I'll adapt my approach based on your project's specific needs, dependencies, and build tools.

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. 2d ago First seen · 48 lines · 0 tokens per session scan A 96b6b4b6c174

Subscribe to this mod's changes

npm-scripts is a command published in the GitHub repository Justdvp/claude-code-templates (7 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 300 tokens. 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.