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better-auth

better-auth authentication for Cloudflare D1 (primary), Next.js, Nuxt, Express, and 15+ frameworks via Drizzle ORM/Kysely. Covers 45+ OAuth providers, 2FA, passkeys, organizations, RBAC. Use for self-hosted auth or encountering D1 adapter, schema, session, CORS, OAuth errors.

$ Instalar

git clone https://github.com/secondsky/claude-skills /tmp/claude-skills && cp -r /tmp/claude-skills/plugins/better-auth/skills/better-auth ~/.claude/skills/claude-skills

// tip: Run this command in your terminal to install the skill