[BUG] Bash commands aren't executed in `bash`

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code claims to execute commands in bash even though they're executed in zsh.

What Should Happen?

Claude Code should _actually_ execute commands in bash or show that it's using zsh.

Error Messages/Logs

Steps to Reproduce

1. Create a zsh alias such as alias greeting=echo 'hello'.
2. Execute claude from zsh.
3. Ask Claude Code to execute the alias: note that it'll show the zsh alias from the "Bash" mode.

This was already reported in the issues below but a bot marked both as duplicates:

• #2444
• #2902

Please don't mark this issue as a duplicate unless one of those actually becomes addressed.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.74 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_