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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.221 ·

Windows sandbox helper: hidden windows and real timeout errors

On Windows, sandbox helper windows stay hidden and timeouts now tell you a UAC prompt may be open.

You'll notice Improvements
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
WindowsArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
What

srt-win invocations spawn with windowsHide set, and a spawn that returns ETIMEDOUT now raises a typed timeout error instead of a generic spawn failure.

Details
  • the timeout error carries the full argv and the elapsed milliseconds
  • the install path maps that code onto a message about the UAC prompt possibly still being open
  • Windows only, and only on the srt-win sandbox path
Evidence

srt_win_timeout

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

See this entry in the whole of v2.1.221 →

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