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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.

All of v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Large request bodies can stream and abort when they stall

You'll notice
Useful3 Signal2
Internals

Large uploads that stall now abort with a stalled-upload error instead of hanging to timeout.

What

HTTP requests can now stream their body and watch progress, aborting with a distinct stalled-upload error when no bytes move and no response arrives within a computed window, rather than waiting out a single flat request timeout.

Details
  • Enabled by an internal version check (1.4.1 against 1.4.0); when it does not pass, the old buffered upload with a computed timeout is used instead.
  • The abort message reads "upload stalled: no answer within" followed by the window.
Evidence

upload stalled: no answer within

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

See this entry in the whole of v2.1.251 →