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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.228 ·

Streamed tool inputs serialize correctly once complete

Completed tool inputs no longer show up as empty when written out.

You'll notice Bug Fixes
JSON All of v2.1.228
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Tool CallsArea: what it touches
Bug FixesKind: in v2.1.228,
Bug FixesSection of the release
What

A tool call's assembled input is now a normal enumerable property, so a finished tool input serializes as expected rather than appearing empty.

Details
  • Partial JSON chunks are accumulated by a shared helper instead of a hand-rolled hidden buffer property on each delta.
  • At the end of a content block the accumulated input is redefined as enumerable, writable and configurable.
Evidence

input_json_delta

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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