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nuxt-better-auth

tessl install github:onmax/nuxt-skills --skill nuxt-better-auth

github.com/onmax/nuxt-skills

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.

Review Score

93%

Validation Score

13/16

Implementation Score

100%

Activation Score

85%

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

FileTopics
references/installation.mdModule setup, env vars, config files
references/client-auth.mduseUserSession, signIn/signUp/signOut, BetterAuthState, safe redirects
references/server-auth.mdserverAuth, getUserSession, requireUserSession
references/route-protection.mdrouteRules, definePageMeta, middleware
references/plugins.mdBetter Auth plugins (admin, passkey, 2FA)
references/database.mdNuxtHub integration, Drizzle schema, custom tables with FKs
references/client-only.mdExternal auth backend, clientOnly mode, CORS
references/types.mdAuthUser, AuthSession, type augmentation

Usage Pattern

Load based on context:

DO NOT read all files at once. Load based on context.

Key Concepts

ConceptDescription
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

// Client: useUserSession()
const { user, loggedIn, signIn, signOut } = useUserSession()
await signIn.email({ email, password }, { onSuccess: () => navigateTo('/') })
// Server: requireUserSession()
const { user } = await requireUserSession(event, { user: { role: 'admin' } })
// nuxt.config.ts: Route protection
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