vercel-labs/agent-skills ? reverse-engineered prompt

Hey, I'd like you to build me a modern web app. Please use a framework like Next.js. As you build it, I want you to focus heavily on performance and best practices. Follow Vercel's own engineering guidelines to make sure it's fast and optimized—check for things like bundle size and efficient data fetching.

The user experience is also really important. Please audit the UI as you go, making sure it’s accessible and follows modern web design rules for things like forms, typography, and dark mode. For navigation, let's add some really smooth, app-like page transitions. Finally, once you have something ready, please deploy it to Vercel and send me the preview link so I can check it out.