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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 v2.1.40 12 Feb 2026

Streaming Idle Timeout

What

Streams now abort automatically if no data is received for extended periods.

Details

Warning logged when stream is idle
Automatic abort after configurable timeout
Throws "Stream idle timeout - no chunks received" error

Evidence

Idle timeout handling (search for "Streaming idle timeout", "no chunks received")

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

See this entry in the whole of v2.1.40 →