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Modern frontend architecture is shifting from client-centric SPAs to distributed UI systems built on three pillars: TypeScript for type safety across server-client-AI boundaries, React Server Components for server-first rendering with reduced JS bundle sizes, and AI as an integrated architectural layer rather than just a development tool. The post covers practical patterns including typed server-client data flows, streaming LLM responses via Server Actions, and a real-world stack using Next.js App Router, TypeScript strict mode, AI SDK, and pgvector. It also addresses tradeoffs — increased complexity, debugging difficulty, and overengineering risk — and provides guidance on when this stack is and isn't appropriate.

The New Frontend Stack: TypeScript + AI + Server Components

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