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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Large request bodies can stream and abort when they stall

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

You'll notice New Features
JSON All of v2.1.251
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
InternalsArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
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 →

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