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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 v2.0.5 ·

Removed Obsolete Tool Concurrency Error

Entry
JSON All of v2.0.5
EntryKind: in v2.0.5,
ChangesSection of the release

What: Eliminated the "tool use concurrency issues" error message that instructed users to run /rewind to recover conversations.

Details:

  • The underlying API error condition (400 status for tool_use without tool_result blocks) is no longer expected
  • Suggests server-side fix has been implemented
  • Users will no longer encounter this specific error message
  • Evidence: Error handling removed from fk1() at lines 23711-23720 in v2.0.3

See this entry in the whole of v2.0.5 →

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