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Review and write React/Next.js code following Page Driven Development principles. Use when organizing components, making file structure decisions, or asked to "review structure", "organize code", "refactor components", or "follow PDD".

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.