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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 v2.1.248

First error in a failed run is handled separately

Under the hood
Useful1 Signal1
Error Handling

The first error of a failed run is now handled distinctly from later ones.

What

When a run ends in an execution error, the collected errors now pass through a helper in a "first" mode so the first error is treated distinctly from the rest before being reported. The retry cap and its telemetry are unchanged.

Details
  • MAX_STRUCTURED_OUTPUT_RETRIES is still honoured as an environment override.
Evidence

error_max_structured_output_retries

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →