What is nodejs-starter CLAUDE.md?

Repository instructions for a minimal Node.js library and command-line starter written in TypeScript. Node.js runs JavaScript outside a web browser, while the template uses yargs for commands and Vitest for tests.

Use it when starting a Node.js library or CLI, locating commands and public exports, running tests, or adapting the template to a real project.

It explains the template’s file layout, build assumptions, and placeholder code so developers know what to replace and what guidance may still be generic.

nodejs-starter CLAUDE.md — Instructions file by threeal

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 instructions/threeal/nodejs-starter/claude-md

Clone the repo

git clone --depth 1 https://github.com/threeal/nodejs-starter

Per session 773 This file is loaded in full into every session.

When invoked 773 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5	$0.00773	$0.00773
Opus 5	$0.00387	$0.00387
Sonnet 5	$0.00155	$0.00155
Haiku 4.5	$0.00077	$0.00077

Measured yesterday against content hash a22ec2c6da09, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

nodejs-starter CLAUDE.md 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 yesterday.

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.

CLAUDE.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Template notice: This file describes the template repository itself. If working in a project derived from this template, inform the user that this CLAUDE.md still contains template guidance and should be updated with project-specific content.

About This Repository

This is a minimal Node.js library and CLI starter template written in TypeScript targeting Node 24 (ESM). The Fibonacci sequence code in src/ is a placeholder — replace it with your actual library and CLI logic when starting a new project.

Architecture

Source Files

src/cli/commands/ — Individual yargs command modules; each exports a createXxxCommand() factory that accepts injected streams/deps for testability.
src/cli/index.ts — CLI entry point built with yargs that wires commands and parses process.argv.
src/fibonacci.ts — The library implementation (currently a Fibonacci sequence generator as a placeholder example).
src/index.ts — The library's public API (re-exports from implementation modules).
src/*.test.ts — Vitest test files co-located with source.

Build Outputs

dist/cli/index.js — CLI binary.
dist/index.js + dist/index.d.ts — Library entry (exported as ".").

Tooling

Dependabot

Keeps GitHub Actions and npm dependencies up to date automatically via .github/dependabot.yaml.

ESLint

Linter configured in eslint.config.ts.

GitHub Actions

Automates CI. Workflow files:

.github/workflows/ci.yaml — Triggers on push to main, pull requests, and manual dispatch.

Lefthook

Git hook manager configured in lefthook.yaml.

pnpm

Package manager. Also manages the Node.js runtime — versions for Node.js and pnpm are pinned in package.json.

Prettier

Formatter configured in .prettierrc.json using prettier-plugin-organize-imports — import order is auto-managed.

Read the full file on GitHub · 87 lines

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.

yesterday First seen · 87 lines · 773 tokens per session scan A a22ec2c6da09

Subscribe to this mod's changes

nodejs-starter CLAUDE.md is an instructions file published in the GitHub repository threeal/nodejs-starter (5 stars, last pushed 4d ago), licensed Unlicense. It adds 773 tokens to every session, about $0.0039 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.

Browser automation Planning Testing eslint javascript lefthook nodejs template typescript

nodejs-starter CLAUDE.md