[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?

Claude Code in Cowork disconnects immediately when sending messages over SSH. Was working fine until ~March 18. Local Cowork sessions work fine. Regular Claude Code over SSH works fine. Tried reinstall, cache clear — no fix.

What Should Happen?

Claude should maintain a stable connection when sending messages over SSH, as it did prior to ~March 18, 2025. Messages should be sent and processed normally without the session disconnecting.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Desktop app
2. Start a Cowork session connecting to a remote SSH server
3. SSH connection establishes successfully
4. Type any message in the command prompt and press Enter
5. Connection drops immediately

Note: This was working fine until approximately March 18, 2025. Nothing changed on my end (same server, same setup, same network).

Additional testing:

• Local (non-SSH) Cowork sessions work fine
• Regular Claude Code over the same SSH connection works fine
• Tried: full reinstall, cache/data clear, latest Claude Desktop version — issue persists

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.83

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_