[BUG] Infinite Line Breaks Causing Display Corruption in Claude Code

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 running Claude Code, the terminal experiences infinite line breaks that cause display corruption and prevent normal operation. While typing input is still registered, each line break gets duplicated causing text to overlap and become unreadable.

<img width="983" height="764" alt="Image" src="https://github.com/user-attachments/assets/f7b7c29d-7c27-47a1-8ada-8d7c42a62d5a" />

<img width="962" height="696" alt="Image" src="https://github.com/user-attachments/assets/d49cac7f-6c77-4996-851f-83522657ef41" />

What Should Happen?

Issue Details

Problem: Continuous/infinite line breaks occurring during Claude Code execution
Impact: Screen/display becomes corrupted, unable to execute tasks properly
Behavior: Keyboard input works normally, but line breaks are duplicated when typing, resulting in overlapping text

Troubleshooting Steps Already Attempted

OS update performed
Tried running in different terminal emulators
Exhausted all available troubleshooting measures

Error Messages/Logs

Steps to Reproduce

Start claude code..that's all..

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.0.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_