create-auth-skill

SKILL.md

Scaffold and implement authentication in TypeScript/JavaScript apps with Better Auth framework detection, database adapter setup, and OAuth integration.

Detects frameworks (Next.js, SvelteKit, Nuxt, Astro, Express, Hono), databases (Prisma, Drizzle, MongoDB, raw drivers), and existing auth libraries through project scanning

Supports email/password, OAuth (Google, GitHub, Apple, Microsoft, Discord, Twitter), magic links, passkeys, and phone authentication with configurable email verification and password reset

Includes plugins for two-factor authentication, organizations/teams, admin dashboards, API bearer tokens, and enterprise SSO via scoped packages

Generates server config (auth.ts), client config (auth-client.ts), route handlers, database migrations, and auth UI pages tailored to your framework and requirements

Create Auth Skill

Guide for adding authentication to TypeScript/JavaScript applications using Better Auth.

For code examples and syntax, see better-auth.com/docs.

Phase 1: Planning (REQUIRED before implementation)

Before writing any code, gather requirements by scanning the project and asking the user structured questions. This ensures the implementation matches their needs.

Step 1: Scan the project

Analyze the codebase to auto-detect:

Framework — Look for next.config, svelte.config, nuxt.config, astro.config, vite.config, or Express/Hono entry files.

Database/ORM — Look for prisma/schema.prisma, drizzle.config, package.json deps (pg, mysql2, better-sqlite3, mongoose, mongodb).

Existing auth — Look for existing auth libraries (next-auth, lucia, clerk, supabase/auth, firebase/auth) in package.json or imports.

Package manager — Check for pnpm-lock.yaml, yarn.lock, bun.lockb, or package-lock.json.