claude-code - 💡(How to fix) Fix [BUG] Claude Desktop strips newlines when pasting from MacVim [1 participants]

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anthropics/claude-code#49561Fetched 2026-04-17 08:37:38
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

When pasting text copied from MacVim, Claude desktop strips newlines, collapsing the text into a single line.

What Should Happen?

Newlines are preserved, matching the original text from MacVim.

Error Messages/Logs

Steps to Reproduce

  1. Copy text containing newlines from MacVim (e.g., using "+y or the system clipboard)
  2. Paste into the Claude desktop input field

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.92 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

Additional Context Pasting the same text from MacVim into Apple Notes preserves newlines correctly, which suggests the issue is in how Claude desktop processes the clipboard content rather than how MacVim writes to the clipboard.

Environment

  • OS: macOS 26.4.1
  • Claude desktop version: Claude 1.2773.0 (884b37) 2026-04-15T14:32:09.000Z
  • Source application: MacVim

extent analysis

TL;DR

The issue can likely be resolved by modifying how Claude desktop processes clipboard content to preserve newlines.

Guidance

  • Investigate the clipboard data format used by MacVim and how it differs from what Claude desktop expects, as the issue seems specific to the interaction between these two applications.
  • Compare the behavior of pasting text from MacVim into other applications like Apple Notes, which preserves newlines, to identify potential workarounds or fixes for Claude desktop.
  • Check if there are any configuration options in Claude desktop or MacVim that could affect how text is copied or pasted, potentially offering a simple solution.
  • Consider testing with different text editors or sources to see if the issue is isolated to MacVim or if it's a more general problem with how Claude desktop handles newline characters.

Example

No specific code example can be provided without more details on the internal workings of Claude desktop or MacVim's clipboard handling, but debugging the clipboard content and its processing might involve inspecting the data formats and encoding used.

Notes

The solution may depend on the specific versions of MacVim and Claude desktop, as well as the macOS version, given the mention of different behaviors across applications. The fact that Apple Notes preserves newlines suggests the issue is not with MacVim's copying but rather with how Claude desktop interprets the clipboard content.

Recommendation

Apply a workaround by exploring configuration options in both MacVim and Claude desktop that might affect text formatting during copy and paste operations, as this seems to be an interaction issue between the two applications rather than a straightforward bug in one of them.

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claude-code - 💡(How to fix) Fix [BUG] Claude Desktop strips newlines when pasting from MacVim [1 participants]