Better Auth

This handles authentication across any TypeScript framework with a pragmatic plugin system. You get email/password and OAuth out of the box, then add passkeys, 2FA, magic links, or multi-tenant orgs as plugins when you need them. The framework-agnostic design means the same auth code works in Next.js, SvelteKit, Express, or whatever you're using. What's nice is the CLI generates your database schema and the client hooks integrate cleanly with React, Vue, or Svelte. It's comprehensive without being opinionated about your stack, which matters if you're building something that might outlive the current JavaScript framework wars.

skills.sh installs: 396
GitHub stars: 2.2K
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add mrgoonie/claudekit-skills --skill better-auth --agent claude-code

Installs into .claude/skills of the current project.

Files

Better Auth Skill

Better Auth is comprehensive, framework-agnostic authentication/authorization framework for TypeScript with built-in email/password, social OAuth, and powerful plugin ecosystem for advanced features.

When to Use

Implementing auth in TypeScript/JavaScript applications
Adding email/password or social OAuth authentication
Setting up 2FA, passkeys, magic links, advanced auth features
Building multi-tenant apps with organization support
Managing sessions and user lifecycle
Working with any framework (Next.js, Nuxt, SvelteKit, Remix, Astro, Hono, Express, etc.)

Quick Start

Installation

npm install better-auth
# or pnpm/yarn/bun add better-auth

Environment Setup

Create .env:

BETTER_AUTH_SECRET=<generated-secret-32-chars-min>
BETTER_AUTH_URL=http://localhost:3000

Basic Server Setup

Create auth.ts (root, lib/, utils/, or under src/app/server/):

import { betterAuth } from "better-auth";

SKILL.md on GitHub

Details

Repository: github.com/mrgoonie/claudekit-skills
Categories: Backend & APIs, Security, Git & Pull Requests, Databases
First seen: Jun 3, 2026