CLAUDE_CODE_SHELL

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CLAUDE_CODE_SHELL is a Claude Code environment variable: Override shell for Bash tool (must be bash or zsh). Present since v2.1.69 or earlier and still present in v2.1.294. It is listed in the official reference.

StatusPresent in v2.1.294
AddedPresent since v2.1.69 or earlier
CategoryShell and tools
Official docsListed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_SHELL=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_SHELL": "<value>"
  }
}

Release notes that mention it

Related variables

Frequently asked questions

What does CLAUDE_CODE_SHELL do?

Override shell for Bash tool (must be bash or zsh)

Which Claude Code version has CLAUDE_CODE_SHELL?

Present since v2.1.69 or earlier and still present in v2.1.294.

How do I set CLAUDE_CODE_SHELL?

Export it before starting Claude Code (export CLAUDE_CODE_SHELL=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.