Stream responses in real-time changedagent-sdk/streaming-output
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Upstream edited this page at 21 Oct 2026 02:01 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 21 Oct 2026 02:07 UTC.
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315315## Known limitations
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317* **Structured output**: with partial messages enabled, the JSON streams as a tool call's unvalidated `input_json_delta` chunks, and only the validated result reaches the final `ResultMessage.structured_output`. See [structured outputs](/docs/en/agent-sdk/structured-outputs) for details.
317* **Structured output**: with partial messages enabled, the JSON streams as a tool call's unvalidated `input_json_delta` chunks, and only the validated result reaches the final `ResultMessage.structured_output`. [Recognize the StructuredOutput tool call](/docs/en/agent-sdk/structured-outputs#recognize-the-structuredoutput-tool-call) covers how that call appears in your stream.
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319319## Next steps
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