useChat, streamText, and data-stream protocol — the modern streaming stack.
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Vercel AI SDK 5 streamText: how do you stream LLM chat to React?
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Server streamText() streams tokens via data-stream protocol; client useChat renders incrementally. AI SDK 5 unified streamText + useChat with transport abstraction and generateId.
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Dossier 57 of 80 decoded in the AI Engineering track. One more won't hurt.