[BUG] Claude Code does not render any readable text when displaying a plan in Windows PowerShell

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?

Text is not rendered in plan.

What Should Happen?

Show the text in plan so user can read it in PowerShell.

Error Messages/Logs

Steps to Reproduce

• Install latest node (msi for Windows) version 24.12.0
• install latest claude version 1.0.24
• run claude
• select plan mode
• the app will display invisible or unreadable characters in plan in Windows Powershell.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.24

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

Other bugs were either closed or marked as completed although I still see the same issues reported by other users.

<img width="2055" height="937" alt="Image" src="https://github.com/user-attachments/assets/655be5f9-39b1-46bd-81f4-8cb262e05242" />

<img width="812" height="687" alt="Image" src="https://github.com/user-attachments/assets/a5a186f6-7606-4663-b408-6195361945c3" />