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
The sandbox is a fenced-off area that limits what commands can touch. Claude Code has a new status hint, a short line shown in its interface, that reads: "Starting the sandbox · setting file permissions can take a few minutes, mostly the first time in a large project". It is marked high priority, so it should show ahead of other hints.
Why
It explains a long wait while the sandbox starts on Windows, so the pause does not look like a freeze.