Home / travisjneuman / .claude · GitHub

authentication-patterns SKILL.md skillA

authentication-patterns from travisjneuman/.claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add travisjneuman/.claude/authentication-patterns@git:20260228.62823bf

Pins git:20260228.62823bf in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: travisjneuman/.claude
Path: skills/authentication-patterns/SKILL.md
Versions recorded: 2
Latest version: git:20260228.62823bf, committed Feb 28, 2026
First version recorded: Feb 7, 2026
Size: 17,460 bytes
Repository stars: 105
License: MIT

OAuth 2.0, JWT, SSO, MFA, NextAuth/Clerk/Supabase Auth implementation patterns.

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

# Authentication Patterns

## Overview

This skill covers authentication and authorization implementation across web and mobile applications. It addresses OAuth 2.0 flows (Authorization Code with PKCE, Client Credentials), JWT management (access tokens, refresh tokens, rotation), session management strategies, multi-factor authentication (TOTP, WebAuthn/passkeys), integration with auth libraries (NextAuth/Auth.js v5, Clerk, Supabase Auth, Lucia), SSO protocols (SAML, OIDC), and authorization patterns (RBAC, ABAC).

Use this skill when building login/signup flows, integrating social login providers, implementing MFA, setting up SSO for enterprise customers, designing authorization models, or migrating between auth providers.

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## Core Principles

1. **Never roll your own crypto** - Use established libraries for password hashing (bcrypt, argon2), JWT signing, and OAuth flows. Custom auth code is the #1 source of security vulnerabilities in web applications.
2. **Defense in depth** - Authentication is not a single check. Layer session validation, CSRF protection, rate limiting, and anomaly detection. Assume every layer can be bypassed individually.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add travisjneuman/.claude/authentication-patterns@sha256:1511a244212776a2

The line at the top of this page pins the label git:20260228.62823bf, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_qu6zgzu2m66gc34o.svg)](https://markdownregistry.com/a/art_qu6zgzu2m66gc34o)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Feb 7, 2026 and Feb 28, 2026, about one every 22 days.

version	committed	commit	size	audit
git:20260228.62823bf latest	2026-02-28	62823bf	17,460 B	A	view · diff
git:20260207.49cc324	2026-02-07	49cc324	17,451 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (17460 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

GitHub

travisjneuman/.claude · 105 stars · license MIT · pushed 2026-10-19 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_qu6zgzu2m66gc34o
GET https://markdownregistry.com/api/v1/resolve?ref=travisjneuman/.claude/authentication-patterns
GET https://markdownregistry.com/api/v1/blob/1511a244212776a2f3a215206e2d2dbf9897ac846862d3104c331dc852b0225e

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.

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