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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.0.58

Concurrent Tool Error Propagation

What: When one tool in a concurrent execution fails, sibling tools are now gracefully aborted with a clear "Sibling tool call errored" message instead of continuing independently.

Details:

  • New hasErrored flag tracks error state across concurrent tools
  • getAbortReason() distinguishes between user interruption and sibling errors
  • Synthetic error messages clearly indicate why tools were aborted
  • Evidence: Class y30 at line 411600, createSyntheticErrorMessage() at line 411636, getAbortReason() at line 411653 in v2.0.58

See this entry in the whole of v2.0.58 →