[BUG]

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?

Bug: Text selection in Claude Code copies entire output block instead of visible selection

Environment: macOS, Claude Code (terminal client)

Repro:

1. Run a command that produces long markdown output (e.g., a multi-paragraph response)
2. Try to select 5–10 words with mouse drag
3. Cmd+C

Expected: Only the highlighted words are copied to clipboard.
Actual: The entire rendered block (hundreds/thousands of words) is copied.

Impact: Forces users to take screenshots of small text snippets to share back with Claude, which then hits the 200-image-per-conversation API limit and bricks the session with An image in the conversation exceeds the dimension limit / too-many-image requests.

Workarounds users shouldn't need: Option+drag block select, pbcopy redirects, switching terminals.

Ask: Respect terminal selection bounds, or add a "copy this block" affordance next to rendered markdown.

What Should Happen?

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z

Error Messages/Logs

Steps to Reproduce

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z
Bug: Text selection in Claude Code copies entire output block instead of visible selection

Environment: macOS, Claude Code (terminal client)

Repro:

1. Run a command that produces long markdown output (e.g., a multi-paragraph response)
2. Try to select 5–10 words with mouse drag
3. Cmd+C

Expected: Only the highlighted words are copied to clipboard.
Actual: The entire rendered block (hundreds/thousands of words) is copied.

Impact: Forces users to take screenshots of small text snippets to share back with Claude, which then hits the 200-image-per-conversation API limit and bricks the session with An image in the conversation exceeds the dimension limit / too-many-image requests.

Workarounds users shouldn't need: Option+drag block select, pbcopy redirects, switching terminals.

Ask: Respect terminal selection bounds, or add a "copy this block" affordance next to rendered markdown.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z

Claude Code Version

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z