node-auth SKILL.md skillA
node-auth from tanq16/claudex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tanq16/claudex/node-auth@git:20260818.236909bPins git:20260818.236909b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tanq16/claudex
- Path
internal/embedded/presets/private/skills/node-auth/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260818.236909b, committed Aug 18, 2026
- Size
- 7,466 bytes
- Repository stars
- 3
- License
- none declared
Password and session-cookie authentication for a Node Web Only server, built entirely on node:crypto. Use when adding a login flow, hashing or verifying a password, issuing or validating a session, setting a cookie, or protecting a route. Triggers on scrypt, timingSafeEqual, createHmac, Set-Cookie, HttpOnly, SameSite, users.json, session tokens, and any mention of bcrypt, jsonwebtoken, or passport.
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
# Node Auth
**scrypt for passwords, an HMAC-signed token for sessions, and an `HttpOnly` cookie to carry it. No auth framework and no database.**
`node:crypto` covers all of it, so the login path adds no dependency, no middleware chain, and no session store to operate.
## Password Hashing
`scrypt` is the memory-hard key derivation function `node:crypto` exposes. Memory hardness is what makes a stolen hash expensive to attack on a GPU, which a plain SHA-256 is not.
Each password gets a fresh 16-byte salt, and the stored value is `salt:derivedKey` in hex. A per-user salt means two users with the same password produce different hashes, so one cracked hash reveals nothing about the other account.
Verification compares with `timingSafeEqual`, because a normal comparison returns faster the earlier it finds a mismatched byte, and that timing difference is enough to recover the expected value one byte at a time.
```js
import { randomBytes, scrypt, timingSafeEqual } from 'node:crypto';
import { promisify } from 'node:util';
const scryptAsync = promisify(scrypt);
const KEY_LEN = 64;
export async function hashPassword(password) {
const salt = randomBytes(16);
…Read the whole file at its exact version.
How to install
mdr add tanq16/claudex/node-auth@sha256:9675312164769c1aThe line at the top of this page pins the label git:20260818.236909b, 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_h46p2rfcf2b475s2)
7 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 18, 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 (7466 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
tanq16/claudex · 3 stars · license none declared · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_h46p2rfcf2b475s2 GET https://markdownregistry.com/api/v1/resolve?ref=tanq16/claudex/node-auth GET https://markdownregistry.com/api/v1/blob/9675312164769c1ac35eba1758f07274ba85bf4e54777dd7e99287cd43a7cc09
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.