Why should I use this skill before publishing to NPM?

It prevents 'broken' releases where critical files are missing or sensitive local data is accidentally uploaded to the public registry.

Will this script leave temporary files in my project?

No, the skill builds the package and creates a tarball for inspection, then automatically cleans up all artifacts after the listing is complete.

Can I use this in a monorepo environment?

Absolutely. You can run this skill from any specific package directory (e.g., packages/ai) to verify that individual workspace bundles are correct.

Does this skill respect .npmignore and .gitignore?

Yes, it follows the standard NPM priority logic: the 'files' field in package.json takes precedence, followed by .npmignore, and then .gitignore.

NPM Package Content Inspector

Name: NPM Package Content Inspector
Author: vercel

byvercel

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22,192

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Deployment & DevOps

Inspects and verifies the exact file contents of an NPM package tarball prior to publication to ensure bundle accuracy.

The NPM Package Content Inspector provides developers with a safety net before publishing to the NPM registry. By generating a temporary tarball and listing every included file, this skill allows users to verify that their package.json 'files' field, .npmignore, and .gitignore rules are working as intended. It is an essential tool for preventing the accidental inclusion of sensitive information or the omission of critical distribution files, ensuring that the final production bundle is both clean and functional.

Key Features

01Identifies accidentally included sensitive files before release

02Ensures production bundles match expected distribution structures

03Validates package.json files field and ignore logic

04Generates real-time previews of NPM tarball contents

05Automates build, inspection, and cleanup workflows

0622,192 GitHub stars

Use Cases

01Auditing production bundles for bloat or unnecessary source files

02Verifying package contents before a major production release

03Debugging why specific assets are missing from an installed package

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add vercel/ai list-npm-package-content

For use in Claude.ai and ChatGPT

Download Skill