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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 v2.1.239 21 Aug 2026

Empty API streams get their own error

You'll notice

Useful2 Signal1

Elsewhere

A stream that ends with no events now reports that specifically rather than a vague error.

What

A response stream that closes without delivering a single event now fails with a specific error, StreamNoEventsError, reading "Stream ended without receiving any events", rather than surfacing as generic stream trouble.

Details

Unconditional; applies to any API stream.

Evidence

Stream ended without receiving any events

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

See this entry in the whole of v2.1.239 →