[BUG] When opening a terminal in the company's internal CodeLab container and entering Claude Code, the output often shows garbled characters, especially for Chinese characters. English characters are mostly fine.

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?

When opening a terminal in the company's internal CodeLab container and entering Claude Code, the output often shows garbled characters, especially for Chinese characters. English characters are mostly fine.

What Should Happen?

When opening a terminal in the company's internal CodeLab container and entering Claude Code, the output should not show garbled characters, whether it's Chinese or English.

Error Messages/Logs

Steps to Reproduce

1、Enter the company's internal CodeLab and open a terminal.
2、Launch Claude Code and input a question.
3、Claude Code outputs content, but the content displays as garbled characters.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

4.7

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_