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Sweep 12 Nov 2026 · 23:00Z Build v2.1.323 540 read Stable v2.1.311 Latest v2.1.323 Next v2.1.323 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.323 ·

Unsupported requests from apps now come back with an error code

When an app sends Claude Code a request it does not support, the error now carries the code unsupported_request

You'll notice Improvements
JSON All of v2.1.323
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SDKArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What

Apps and tools built on the SDK (the toolkit for driving Claude Code from a program) send Claude Code control requests, which are messages telling a session what to do. When Claude Code does not support a request, its error reply now includes error_code: "unsupported_request".

Why

Programs can recognise this error by its code instead of matching the wording of the message.

Read from
Names in the bundleunsupported_request
What the documentation says
Documented inapi/build-with-claude/message-threads

See this entry in the whole of v2.1.323 →

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