---
title: Create Auth Skill
category: product
entity_type: skill
price: $15
canonical: https://forgehouse.ai/skills/create-auth-skill/
lang: en
hreflang_alt: https://forgehouse.ai/tr/skiller/create-auth-skill/
last_updated: 2026-06-20
---

# Create Auth Skill

> Skill for creating auth layers in TypeScript/JavaScript apps using Better Auth.

A guided authentication implementation toolkit built on the Better Auth framework for TypeScript and JavaScript apps. It walks you from an empty project (or an existing one with no auth) through server config, client setup, route handlers, database migrations, and feature plugins: so you ship secure login, sessions, and access control without reinventing OAuth, CSRF, or session handling.

## Use cases
- Adding email/password login to a fresh Next.js, Express, SvelteKit, or Hono app
- Wiring Google or GitHub OAuth with correct PKCE, redirect URIs, and trusted origins
- Layering two-factor (TOTP/OTP), passkeys, or enterprise SSO onto existing auth
- Choosing between session-based (Redis) and stateless JWT auth for your use case
- Running schema migrations across Prisma, Drizzle, Kysely, or raw SQL adapters
- Auditing an existing auth setup for security gaps before production

## Benefits
- Ship a production-ready login flow in hours instead of weeks of trial and error
- Avoid the silent security holes: wildcard origins, disabled CSRF, weak secrets, caught by a built-in security checklist
- Pick the right session strategy with a clear understanding of the cross-device logout trade-off
- Reduce auth support tickets with friction-free flows and human-readable error messages

## What’s included
- Decision tree for new project, migration, or add-to-existing scenarios
- Per-framework route handler and client import reference (React, Vue, Svelte, Solid, vanilla)
- Database adapter setup matrix for SQLite, PostgreSQL, MySQL, Prisma, Drizzle, MongoDB
- Plugin catalog for 2FA, organizations, admin, passkeys, bearer tokens, and SSO
- Pre-launch security checklist plus a troubleshooting table for common failures
- Environment variable and secret generation guidance

## Who it’s for
Full-stack and backend developers who need to add or harden authentication in a TypeScript/JavaScript application.

## How it runs
Three starting points, three different builds: empty project, existing app, or migration from another auth system. A decision tree picks the branch, then config pairs, framework wiring and schema migrations follow through a security checklist.
1. Starts at the decision tree, not at npm install: new empty project, existing project without auth, or migration from an existing auth system, because each branch has a different sequence and the migration branch starts with a gap audit.
2. Installs the core plus only the scoped packages the case needs (passkey, sso, stripe, expo), then sets the env floor: a 32+ character secret, base URL and database connection.
3. Creates the pair of config files: auth.ts on the server (database, email/password, social providers, plugins) and auth-client.ts with the import matched to the framework, React, Vue, Svelte, Solid or vanilla.
4. Wires the route handler per framework from the mapping table: the catch-all route for Next.js App Router, hooks.server.ts for SvelteKit, app.all for Express, with the nextCookies plugin added when Server Components are in play.
5. Runs the schema migration matched to the adapter: direct migrate for the built-in Kysely, or generate then prisma migrate / drizzle-kit push, and repeats it after every plugin addition.
6. Finishes against the security checklist: trustedOrigins without wildcards, rate limits verified against a live Redis, OAuth callback URLs matching the provider dashboard, account linking behavior consciously chosen, CSRF never disabled.

## FAQ
### Does this lock my app to Better Auth, or can I switch frameworks later?
It builds on Better Auth, so your auth layer lives in your own codebase rather than a vendor's dashboard. If you later change your web framework, the same Better Auth core moves with you across Next.js, Express, SvelteKit, or Hono.

### OAuth usually breaks on redirect URIs and PKCE. How does this avoid those misconfigurations?
It wires the redirect URIs, trusted origins, and PKCE flow as part of the guided setup, instead of leaving you to discover them through failed logins. You still register the app on Google or GitHub yourself, but the handshake config is laid out for you.

### Is this a hosted auth service I can offload to?
No. It sets auth up inside your own app and database, so you run and own it, unlike a managed identity service. That keeps your user data in your hands but means uptime and key rotation are yours to handle.

## Price
$15, one-time, no subscription. VAT included.

Related guide: [AI for application security](https://forgehouse.ai/guides/ai-application-security/)