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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.228 ·

Unparseable tool-call JSON gives a clear error instead of breaking the stream

Broken tool-call JSON now gives you a readable error instead of killing the response.

You'll notice Bug Fixes
JSON All of v2.1.228
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Tool CallsArea: what it touches
Bug FixesKind: in v2.1.228,
What probably matters to youSection of the release
What

When the model emits tool input JSON that will not parse, the failure is caught while streaming, the input is replaced with an empty object, and you get a readable message quoting the bad JSON rather than the stream blowing up.

Details
  • Caught at both the incremental delta and the end of the content block.
Evidence

Unable to parse tool parameter JSON from model. Please retry your request or adjust your prompt.

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.228 →

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