You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
SandboxArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
The sandbox is a fenced-off area where Claude Code runs commands with limits on what they can touch. If you set sandbox.failIfUnavailable and the sandbox cannot run, Claude Code refuses to start. Its message now reads "Refusing to start without a working sandbox (see sandbox.failIfUnavailable)." The separate line saying that sandbox.failIfUnavailable is set has been removed.
Why
Only the wording changed. Claude Code still refuses to start in the same cases.
