Handles Auth0 authentication in React SPAs using the official SDK with redirect-based Universal Login flows. Works with Vite and Create React App across React 16-19. The skill walks you through wrapping your app in Auth0Provider, wiring up login/logout buttons with the useAuth0 hook, and protecting routes. It includes automated setup scripts and covers MFA workflows with the mfa API client for enrollment and challenge flows. Watch out for environment variable prefixes, they're different between Vite and CRA. If you're using Next.js or React Native, there are separate skills for those. The common mistakes table is actually useful, especially the warnings about manual token storage and MFA error handling.
npx skills add https://github.com/auth0/agent-skills --skill auth0-react