[BUG] Cannot selectively copy text from assistant response — only full-message copy works

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?

Here's a draft you can paste directly into the GitHub issue:

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Title: Cannot selectively copy text from assistant response — only full-message copy works

Description:

In Claude Code on the web, it is not possible to select and copy a specific portion of text from an assistant response. Attempting to click-drag to highlight a substring results in either no selection or the entire message being selected/copied instead.

Environment:

• Claude Code: Web (remote execution / cloud session)
• Platform: Browser

Steps to reproduce:

1. Receive any multi-line response from the assistant in the Claude Code web interface
2. Attempt to click and drag to highlight a specific word, sentence, or paragraph within the response
3. Press Ctrl+C / Cmd+C to copy

Expected behavior:
The highlighted/selected text is copied to the clipboard.

Actual behavior:
Either the selection does not work as expected, or only the full message is copied rather than the selected portion.

Impact:
This makes it difficult to extract specific code snippets, URLs, or sections of a response without copying and then manually trimming the entire message text.

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Feel free to edit before submitting at https://github.com/anthropics/claude-code/issues.

What Should Happen?

Should be able to copy selective portinos of text in the Routine environment

Error Messages/Logs

Steps to Reproduce

Try to copy selective portions of text in the routine environment

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

current

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_