[Bug] Bash tool emits non-zsh-compatible syntax when SHELL=zsh on macOS

Bug Description
On macOS the Bash tool runs zsh (stated in the env context), but the model routinely emits bash-specific syntax that fails under zsh — sometimes silently, e.g. for x in $LIST loops once because zsh doesn't word-split unquoted variables; failed globs abort with "no matches found". The model should respect the reported shell or use POSIX-portable syntax, and the Bash tool description could call out the divergences when SHELL is zsh.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.170
• Feedback ID: 6026da8b-d33b-4b3e-b135-80b475e912a2

Errors

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