This drops Better Auth into Claude Code projects when you need authentication that actually works with Cloudflare D1 and modern TypeScript stacks. It's built for self-hosting across 15+ frameworks (Next.js, Nuxt, Workers, Remix) and includes OAuth, 2FA, passkeys, RBAC, and multi-tenant setups. The skill prevents about 20 common errors, mostly around D1 adapter confusion (there's no d1Adapter, you use Drizzle or pass the binding directly in v1.5+) and ESM-only requirements since v1.4. It's a solid Clerk alternative if you want control over your auth stack. The documentation makes migration straightforward, and the new CLI tools in v1.5 handle schema generation and upgrades cleanly.
npx -y skills add secondsky/claude-skills --skill better-auth --agent claude-codeInstalls into .claude/skills of the current project.
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