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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 v2.1.229 12 Aug 2026

Killed SDK sessions are no longer reported as execution errors

You'll notice

Useful3 Signal2

SDK

Deliberately killed SDK sessions now report as terminated instead of showing up as execution errors.

What

A result that ends because the session was terminated now carries the subtype "terminated" rather than "error_during_execution", so deliberate kills stop showing up as failures.

Evidence

error_during_execution

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

See this entry in the whole of v2.1.229 →