[BUG] /desktop fails with "CLI session transcript not found" on Windows

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: /desktop command fails with "CLI session transcript not found" on Windows

Version: Claude Code v2.1.113
OS: Windows 11
Node: v24.14.1 (fnm)

Steps to reproduce:

1. Run claude in PowerShell
2. Execute /desktop
3. Claude Desktop opens and immediately shows error dialog

Error:

Couldn't open session
CLI session transcript not found: <uuid>

Root cause identified:
~/.claude/sessions/ directory exists but is always empty. Claude Code generates a session UUID and passes it to Claude Desktop via deep link, but never writes the transcript file to disk. Claude Desktop then fails to find the file.

Verified:

• ~/.claude/sessions/ → empty
• ~/.claude/projects/ → contains .jsonl files but none matching the UUID shown in error
• Reinstalling Claude Code does not fix it
• Updating Claude Desktop to latest does not fix it
• Error UUID changes on every /desktop invocation

Workaround: Use Claude Code directly in terminal. /desktop integration is non-functional on Windows.

Expected behavior: Session transcript written to ~/.claude/sessions/<uuid>.jsonl before Desktop is launched.

What Should Happen?

Session transcript written to ~/.claude/sessions/<uuid>.jsonl before Claude Desktop is launched. Desktop should open the session successfully.

Error Messages/Logs

Couldn't open session
CLI session transcript not found: ae708bb8-735a-4732-b891-8f93fb0abea9

Steps to Reproduce

1. Open PowerShell (Windows 11)
2. Run claude
3. Execute /desktop
4. Claude Desktop opens and shows error dialog immediately

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Unknown

Claude Code Version

v2.1.113

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_