Menu

Individual skill

better-auth

Better Auth in TypeScript — setting up the auth instance, picking adapters, wiring framework route handlers, configuring sessions and cookies, adding plugins (2FA, organization, admin, magicLink, JWT), or porting from NextAuth/Auth.js, Clerk, Auth0, or Supabase Auth. Covers Next.js, SvelteKit, Hono, Express, Nuxt, Astro, and React/Vue/Svelte clients. Trigger when writing, reviewing, or migrating Better Auth code — and even when the user doesn't explicitly mention Better Auth but is working on TypeScript authentication, session cookies, OAuth providers, or auth-library migration. Contains 42 rules organized by impact across 8 categories.

skills/.experimental/better-auth/SKILL.md

Read pinned source

Source commit cf93c57cac89d6fc3e4194686000411567f5caf3

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
Yes
Repository scan complete
No
Skill scan complete
Yes
Observed behavior
Network or broad shell
Last checked
Nov 5, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
221
Repository last updated
Aug 15, 2026
License
MIT

Observed agent integration: codex

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt
# Better Auth Best Practices

Implementation and migration guide for [Better Auth](https://www.better-auth.com), the framework-agnostic TypeScript authentication and authorization library. This skill contains 42 rules organized by impact across 8 categories, derived from the official documentation and migration guides.

## When to Apply

Reference these guidelines when:

- Setting up a fresh Better Auth instance (config, adapter, route handler, client)
- Wiring framework-specific integrations (Next.js App/Pages Router, SvelteKit, Hono, Express, Nuxt, Astro)
- Configuring sessions, cookies, and security (rate limit, trusted origins, password hashing)
- Adding plugins: 2FA, organization, admin, magicLink, JWT, passkey, multi-session
- Migrating from another auth library (NextAuth/Auth.js, Clerk, Auth0, Supabase Auth)
- Debugging "session is null" / "redirect_uri_mismatch" / 403 CSRF errors
- Reviewing PRs that touch `lib/auth.ts`, `auth-client.ts`, or `/api/auth/` route handlers