skill:better-auth - Self-Hosted TypeScript Authentication

Version: 1.0.0

Purpose

Implements self-hosted authentication for TypeScript applications using better-auth — a comprehensive, framework-agnostic auth library with 15+ plugins. This skill configures better-auth for Cloudflare Workers with Cloudflare D1 as the database, using Drizzle ORM or Kysely as the database adapter (better-auth has no direct D1 adapter).

Use this skill when:

• Setting up self-hosted authentication in a TypeScript project
• Building auth for Cloudflare Workers with D1 as the database
• Configuring social authentication providers (GitHub, Google, etc.)
• Adding 2FA/TOTP or passkey/WebAuthn support
• Implementing organizations with role-based access control (RBAC)
• Integrating better-auth plugins for extended functionality