Jotai Atomic State

Jotai is a lightweight state management library for React built on atoms. An atom is a unit of state; atoms compose into derived atoms (computed values). Example: countAtom = 5, doubleAtom = atom(get => get(countAtom) * 2). Jotai handles dependency tracking and re-renders automatically. Advantages over Redux: 10x less boilerplate, better TypeScript, smaller bundle (4KB vs Redux 40KB+), easier to learn.