A feature‑centric layout groups UI, logic, and tests together, reducing the cognitive load when navigating a large project. In a monorepo, each feature can expose a thin public API, letting other apps or packages import only what they need without pulling the entire codebase. This pattern also aligns well with code‑splitting tools and makes onboarding new developers faster because the folder name tells you the purpose of every file.
// packages/auth/src/index.ts
export { default as LoginScreen } from './ui/LoginScreen';
export { login } from './model/loginSlice';
export type { LoginPayload } from './model/types';Now any app can import { LoginScreen, login } from '@myorg/auth' and only the auth bundle is included.
Structure by feature, expose a clear index, and let the monorepo handle sharing—your builds stay lean and your team stays focused.