Vercel / update detail

Chat SDK agents can now stream generative UI with json-render

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Vercel·Nov 6, 2026, 09:00 PMFeatureAI-assisted summary

Summary

Chat SDK agents can now stream generative UI by emitting a JSON spec that json-render turns into native cards (e.g., Slack Block Kit, Teams Adaptive Cards).
Streaming cards update at most every 500 ms, validate against a typed component catalog, and provide detailed CardSpecError messages for invalid specs.
The catalog includes tables, charts, buttons, etc., and adapters automatically handle platform message limits, degrading excess content.

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Official source Last checked Nov 11, 2026, 4:00 PM

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AI-assisted summarysource healthyLast checked Nov 11, 2026, 4:00 PM

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