better-auth

name	better-auth
description	Better Auth integration guide for TypeScript/JavaScript authentication. Covers server/client configuration, database adapters, session management, plugins, OAuth, and scaffolding auth from scratch. Use when setting up authentication with Better Auth, configuring auth.ts, adding OAuth providers, or creating sign-in/sign-up flows.
metadata	{"author":"Better Auth","source":"https://github.com/better-auth/skills","version":"1.0"}

Better Auth Skills

Complete authentication setup and integration guide using Better Auth for TypeScript/JavaScript applications.

Available Sub-Skills

Skill	File	Use When
Best Practices	best-practices-SKILL.md	Configuring Better Auth, database adapters, sessions, plugins, security
Create Auth	create-auth-SKILL.md	Scaffolding auth from scratch, adding login/signup to a project

Quick Reference

Setup

1. npm install better-auth
2. Set BETTER_AUTH_SECRET and BETTER_AUTH_URL env vars
3. Create auth.ts with database + config
4. Create route handler for your framework
5. Run npx @better-auth/cli@latest migrate

Supported Frameworks

Next.js (App/Pages Router), SvelteKit, Nuxt, Astro, Express, Hono, SolidStart

Supported Databases

PostgreSQL, MySQL, SQLite, MongoDB (via Prisma, Drizzle, or direct drivers)

Key Plugins

twoFactor, organization, passkey, magicLink, emailOtp, username, admin, apiKey, bearer, jwt, sso

Source

From better-auth/skills.