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

Claude Code v2.1.248 ·

Headless output failures report a transport write failure instead of raw error text

Headless output failures say "transport write failure" and put the real reason in the log.

You'll notice Improvements
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Headless ModeArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What

When the output stream dies in headless mode, the "session has ended" message now says "transport write failure" for redacted or remote sessions rather than printing the underlying error. The full reason is written to the error log instead.

Evidence

Could not write a message to the output stream (

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

See this entry in the whole of v2.1.248 →

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