[BUG] Hard newlines at visual wrap points corrupt copied text

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 Claude Code wraps long lines of output to fit the terminal width, it inserts actual \n characters at the wrap boundary rather than relying on the terminal's soft-wrap. When the text is selected and pasted (via standard Linux primary selection — select then middle-click), these hard newlines are included, producing broken, malformatted output.
Primary selection (select → middle-click paste) works fine. The issue is exclusively the hard newlines injected at wrap points.

What Should Happen?

It should behave as opencode. Simply!

Error Messages/Logs

Any wrapped output copied from Claude Code is malformatted on paste. Multi-line responses require manual cleanup every time, making the clipboard workflow significantly worse than competing tools.

Steps to Reproduce

1. Run Claude Code in Konsole
2. Ask anything that produces a long wrapped response
3. Select the output text with left-click drag
4. Paste with middle-click

Result: Pasted text contains newlines at every visual line break, breaking paragraphs and making the output unusable as-is.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.105

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

Environment

• OS: Linux archlinux (KDE Plasma)
• Terminal: KDE Konsole

Example

Pasted from Claude Code (broken):

This is a long response that wraps because the terminal is not wide
enough to fit it on one line and the result is that copying it
produces broken text with unwanted newlines everywhere.

Pasted from opencode (correct):

This is a long response that wraps because the terminal is not wide enough to fit it on one line and the result is that copying it produces broken text with unwanted newlines everywhere.

Comparison

| Behaviour | Claude Code | opencode |
|---|---|---|
| Copied text free of wrap newlines | No | Yes |

Both tools tested on identical system/terminal with no configuration changes between tests.