| name | nuxt-better-auth |
| description | Use when implementing auth in Nuxt apps with @onmax/nuxt-better-auth - provides useUserSession composable, server auth helpers, route protection, and Better Auth plugins integration. |
| license | MIT |
Nuxt Better Auth
Authentication module for Nuxt 4+ built on Better Auth. Provides composables, server utilities, and route protection.
Alpha Status: This module is currently in alpha (v0.0.2-alpha.14) and not recommended for production use. APIs may change.
When to Use
- Installing/configuring
@onmax/nuxt-better-auth
- Implementing login/signup/signout flows
- Protecting routes (client and server)
- Accessing user session in API routes
- Integrating Better Auth plugins (admin, passkey, 2FA)
- Setting up database with NuxtHub
- Using clientOnly mode for external auth backends
For Nuxt patterns: use nuxt skill
For NuxtHub database: use nuxthub skill
Available Guidance
| File | Topics |
|---|
| references/installation.md | Module setup, env vars, config files |
| references/client-auth.md | useUserSession, signIn/signUp/signOut, BetterAuthState, safe redirects |
| references/server-auth.md | serverAuth, getUserSession, requireUserSession |
| references/route-protection.md | routeRules, definePageMeta, middleware |
| references/plugins.md | Better Auth plugins (admin, passkey, 2FA) |
| references/database.md | NuxtHub integration, Drizzle schema, custom tables with FKs |
| references/client-only.md | External auth backend, clientOnly mode, CORS |
| references/types.md | AuthUser, AuthSession, type augmentation |
Usage Pattern
Load based on context:
DO NOT read all files at once. Load based on context.
Key Concepts
| Concept | Description |
|---|
useUserSession() | Client composable - user, session, loggedIn, signIn/Out methods |
requireUserSession() | Server helper - throws 401/403 if not authenticated |
auth route mode | 'user', 'guest', { user: {...} }, or false |
serverAuth() | Get Better Auth instance in server routes |
Quick Reference
const { user, loggedIn, signIn, signOut } = useUserSession()
await signIn.email({ email, password }, { onSuccess: () => navigateTo('/') })
const { user } = await requireUserSession(event, { user: { role: 'admin' } })
routeRules: {
'/admin/**': { auth: { user: { role: 'admin' } } },
'/login': { auth: 'guest' },
'/app/**': { auth: 'user' }
}
Resources
Token efficiency: Main skill ~300 tokens, each sub-file ~800-1200 tokens
