better-auth-sso SKILL.md skillA
better-auth-sso from mjunaidca/mjs-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mjunaidca/mjs-agent-skills/better-auth-sso@git:20251221.f6c90d7Pins git:20251221.f6c90d7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mjunaidca/mjs-agent-skills
- Path
docs/taskflow-vault/skills/engineering/better-auth-sso/SKILL.md- Versions recorded
- 1
- Latest version
- git:20251221.f6c90d7, committed Dec 21, 2025
- Size
- 17,930 bytes
- Repository stars
- 28
- License
- none declared
Integrate with Better Auth SSO for OAuth2/OIDC authentication. Use this skill when implementing SSO login flows, PKCE authentication, token management, JWKS verification, or global logout in Next.js applications connecting to a Better Auth server.
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
# Better Auth SSO Integration
Integrate Next.js applications with Better Auth SSO using OAuth 2.1 / OIDC with PKCE flow.
## When to Use
- Implementing SSO login in Next.js apps
- Setting up PKCE-based OAuth flow (public clients)
- Managing tokens in httpOnly cookies
- Verifying JWTs using JWKS
- Implementing global logout across apps
## Architecture Overview
```
┌─────────────────┐
│ Better Auth SSO │ ← Central auth server
│ (Auth Server) │
└────────┬────────┘
│
┌────┴────┐
▼ ▼
┌───────┐ ┌───────┐
│ App 1 │ │ App 2 │ ← Tenant apps (SSO clients)
└───────┘ └───────┘
```
## Quick Start
```bash
# Dependencies
npm install jose
# Environment
NEXT_PUBLIC_SSO_URL=http://localhost:3001
NEXT_PUBLIC_SSO_CLIENT_ID=your-client-id
```
## Core Patterns
### 1. PKCE Authentication Client
```typescript
// lib/auth-client.ts
const SSO_URL = process.env.NEXT_PUBLIC_SSO_URL!;
const CLIENT_ID = process.env.NEXT_PUBLIC_SSO_CLIENT_ID!;
// Base64URL encoding helper
function base64UrlEncode(buffer: Uint8Array): string {
const base64 = btoa(String.fromCharCode(...buffer));
return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
…Read the whole file at its exact version.
How to install
mdr add mjunaidca/mjs-agent-skills/better-auth-sso@sha256:9080dc75c57c5823The line at the top of this page pins the label git:20251221.f6c90d7, 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_y5wyh45txlgalk4z)
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Versions
The registry has recorded 1 version of this file, committed on Dec 21, 2025.
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 (17930 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
mjunaidca/mjs-agent-skills · 28 stars · license none declared · pushed 2026-08-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_y5wyh45txlgalk4z GET https://markdownregistry.com/api/v1/resolve?ref=mjunaidca/mjs-agent-skills/better-auth-sso GET https://markdownregistry.com/api/v1/blob/9080dc75c57c5823c9b90ec2107499957dbf8eb962380357551ca0f4a4fbabac
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.