What
Hook frontmatter now accepts a shell field to specify the shell interpreter, supporting 'bash' or 'powershell'.
Details
- Description: "Shell interpreter. 'bash' uses your $SHELL (bash/zsh/sh); 'powershell' uses pwsh. Defaults to bash."
- Invalid shell values log a warning and fall back to bash
- PowerShell hooks are not available in all builds of Claude Code — if unavailable, a warning is logged
Evidence
Shell hook support (search for "shell must be 'bash' or 'powershell'" and "Shell interpreter.")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.