npm-supply-chain-check SKILL.md skillA
npm-supply-chain-check from majiayu000/spellbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add majiayu000/spellbook/npm-supply-chain-check@git:20260805.f3a68b1Pins git:20260805.f3a68b1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- majiayu000/spellbook
- Path
skills/npm-supply-chain-check/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260805.f3a68b1, committed Aug 5, 2026
- Size
- 6,117 bytes
- Repository stars
- 290
- License
- MIT
Detect known malicious npm package versions and install-time supply-chain indicators in repositories, lockfiles, and node_modules. Use when a user mentions an npm compromise, Shai-Hulud, the Keyv/cacheable incident, suspicious preinstall scripts, credential-stealing packages, or asks whether a JavaScript project was exposed to a package supply-chain attack. Do not use as a general CVE or license audit.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# NPM Supply Chain Check Run an evidence-bounded, read-only scan. Distinguish a dependency reference from proof that malicious code executed, and never read or print secret values. ## Workflow ### 1. Fix the scan boundary Resolve the exact repository or directory first. Default to the current repository only. Do not silently expand a repo scan to the user's home directory, all worktrees, global package caches, or CI systems. ### 2. Check intelligence freshness Read `references/shai-hulud-2026-iocs.json` when investigating that incident. It is a dated minimum baseline, not a complete list of every affected community package. For an active incident, also check current primary sources such as the npm registry and maintainer/security advisories before declaring a version safe. Do not modify the bundled baseline during an ordinary scan. ### 3. Run the deterministic scanner From this skill directory: ```bash python3 scripts/scan_npm_supply_chain.py <target> --format text ``` Use JSON when another tool will consume the result: ```bash python3 scripts/scan_npm_supply_chain.py <target> --format json ``` …
Read the whole file at its exact version.
How to install
mdr add majiayu000/spellbook/npm-supply-chain-check@sha256:ffe7b2dd9ccef737The line at the top of this page pins the label git:20260805.f3a68b1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pwgvbryrpdzgn5rm)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 5, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6117 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
majiayu000/spellbook · 290 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pwgvbryrpdzgn5rm GET https://markdownregistry.com/api/v1/resolve?ref=majiayu000/spellbook/npm-supply-chain-check GET https://markdownregistry.com/api/v1/blob/ffe7b2dd9ccef737bb1891d101a979f763a368ac5f9d71fad17e19807194a917
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.