Add email verification, password reset, and account management emails to Better Auth using Resend.
TypeScript authentication framework (framework-agnostic). Features: email/password, OAuth (Google, GitHub, Discord), 2FA (TOTP, SMS), passkeys/WebAuthn, session management, RBAC, rate limiting, database adapters. Actions: implement, configure, secure authentication systems. Keywords: Better Auth, authentication, authorization, OAuth, email/password, 2FA, MFA, TOTP, passkeys, WebAuthn, session management, RBAC, rate limiting, database adapter, TypeScript auth, social login, Google auth, GitHub auth, Discord auth, email verification, password reset. Use when: implementing TypeScript auth, adding OAuth providers, setting up 2FA/MFA, managing sessions, configuring RBAC, building secure auth systems.
Build websites and web applications using Telefonica's Mistica design system React components. Use this skill when writing React UI code with @telefonica/mistica, creating pages, layouts, forms, or any user interface that should follow Telefonica's design guidelines. Triggers on tasks involving Mistica components, Telefonica branding, or when the user mentions Mistica.
Provides shadcn/ui component library expertise for React applications with shadcn/cli v4, preset system, RTL support, unified radix-ui, and OKLCH theming. Use when implementing UI components, design systems, CLI workflows, or registry authoring with shadcn/ui.
React 19 performance optimization guidelines for concurrent rendering, Server Components, actions, hooks, and memoization (formerly react-19). This skill should be used when writing React 19 components, using concurrent features, or optimizing re-renders. This skill does NOT cover Next.js-specific features like App Router, next.config.js, or Next.js caching (use nextjs-16-app-router skill). For client-side form validation with React Hook Form, use react-hook-form skill.
Implement, review, debug, and refactor TanStack Start React Server Components in React 19 apps. Use when tasks mention @tanstack/react-start/rsc, renderServerComponent, createCompositeComponent, CompositeComponent, renderToReadableStream, createFromReadableStream, createFromFetch, Composite Components, React Flight streams, loader or query owned RSC caching, router.invalidate, structuralSharing: false, selective SSR, stale names like renderRsc or .validator, or migration from Next App Router RSC patterns. Do not use for generic SSR or non-TanStack RSC frameworks except brief comparison.
React bindings for TanStack Start: createStart, StartClient, StartServer, React-specific imports, re-exports from @tanstack/react-router, full project setup with React, useServerFn hook.
React component testing patterns including components, hooks, context, and forms. Covers Vitest Browser Mode with vitest-browser-react (preferred) and @testing-library/react. Use when testing React applications. For general UI testing patterns, see the front-end-testing skill.