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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 v2.1.307 ·

Sandbox check now shows a note and stops waiting outside a terminal

The sandbox setup check prints a note in a terminal, and when run without one it now gives up about 150 seconds after start

You'll notice Improvements
JSON All of v2.1.307
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SandboxArea: what it touches
ImprovementsKind: in v2.1.307,
ImprovementsSection of the release
What

A sandbox is the restricted space Claude Code runs commands in. Before it is used, Claude Code checks that it has been set up. That check now behaves differently depending on where Claude Code is running:

  • In an interactive terminal window: it prints a note to error output and waits with no time limit.
  • Anywhere else, such as a script or an automated job: it has a deadline of about 150 seconds after Claude Code started.

Before, there was no note and no deadline.

Why

Runs that nobody is watching can no longer hang forever on this check.

See this entry in the whole of v2.1.307 →

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