Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
SandboxArea: what it touches
Internal ChangesKind: in v2.1.309,
Internal ChangesSection of the release
What
A sandbox is a fenced-off space that limits what a command can touch. After a sandboxed command, Claude Code cleans up after it. That cleanup now runs before the other exit and error cleanup is set up. The check for whether a command is sandboxed also happens earlier.
Why
A failure in this cleanup step is no longer logged as its own separate message.
