You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
WindowsArea: what it touches
ImprovementsKind: in v2.1.287,
ImprovementsSection of the release
What
On Windows, Claude Code can add a PowerShell tool automatically so Claude can run commands. A deny rule is a setting that blocks Claude from using a tool. If you have a deny rule for Bash, it also turns off that automatically added PowerShell tool, and Claude Code now shows a warning about it. The warning says Claude has neither shell tool, and that to use PowerShell you can set CLAUDE_CODE_USE_POWERSHELL_TOOL=1.
The warning is not shown when the deny rule comes from policy settings, which are settings managed by an administrator.
Why
It explains why Claude suddenly cannot run any commands on Windows, and tells you how to get PowerShell back.
