Generates and runs automated browser tests using Playwright CLI and the accessibility tree (DOM snapshot). Faster and cheaper than screenshot-based approaches.
React 19 patterns and React Compiler optimization guidance. Understand when to use manual memoization vs letting the compiler optimize, and leverage new hooks like useActionState…
Tailwind CSS v4 patterns with CSS-first configuration, @theme directive, design system integration, and utility-first styling for Next.js applications.
Cookie-based toast notification system for Next.js. Use when user asks to "show toast", "toast notification", "user feedback after action", "toast after redirect", "success…
Continuously tests and improves Claude Code skills using A/B experimentation and Auto Research ML loop.
Type-safe environment variable validation with @t3-oss/env-nextjs and Zod. Build-time validation ensures all required env vars are present and correctly typed.