Better Auth Authentication

This handles Better Auth setup for TypeScript apps, covering email/password login and OAuth providers like GitHub. You get client methods for signUp, signIn (both email and social), and signOut, plus email verification hooks if you need them. The separation between server config (credentials, verification handlers) and client calls is clean, and it includes callback URLs for post-auth redirects. If you're already using Better Auth or evaluating it against NextAuth or Clerk, this gives you the implementation patterns without digging through docs. The guardrails about keeping secrets server-side and calling client methods only from the client are basic but worth the reminder.

skills.sh installs: 398
GitHub stars: 79
last updated: Aug 21, 2026

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Install

$ npx -y skills add bobmatnyc/claude-mpm-skills --skill better-auth-authentication --agent claude-code

Installs into .claude/skills of the current project.

Files

Better Auth Authentication

Goals

Enable email/password authentication and social providers.
Implement sign-up, sign-in, sign-out, and verification flows.
Handle redirects and errors consistently.

Quick start

Enable emailAndPassword and configure socialProviders.
Create a client with createAuthClient.
Use signUp.email, signIn.email, signIn.social, and signOut on the client.

import { betterAuth } from "better-auth";

export const auth = betterAuth({
  emailAndPassword: { enabled: true },
  socialProviders: {
    github: {
      clientId: process.env.GITHUB_CLIENT_ID as string,
      clientSecret: process.env.GITHUB_CLIENT_SECRET as string,
    },
  },
});

import { createAuthClient } from "better-auth/client";

const authClient = createAuthClient();

await authClient.signUp.email({
  email,
  password,
  name,
});

await authClient.signIn.email({
  email,
  password,
  callbackURL: "/dashboard",
});

await authClient.signIn.social({
  provider: "github",
  callbackURL: "/dashboard",
});

await authClient.signOut();

SKILL.md on GitHub