component-architecture
by mgd34msu
"Load PROACTIVELY when task involves designing or building UI components. Use when user says \"build a component\", \"create a form\", \"add a modal\", \"design the layout\", or \"refactor this page\". Covers component composition and hierarchy, prop design and typing, render optimization (memo, useMemo, useCallback), compound component patterns, controlled vs uncontrolled forms, file organization, and accessibility for React, Vue, and Svelte."