[BUG] @ and / autocomplete not working in Claude Code desktop app on Windows 11

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?

Environment:

Platform: Windows 11 Pro (Build 10.0.26200)
Claude Code Version: [You'll need to check this manually - click the three dots menu → About in the desktop app]
Installation: Desktop app (standalone)
Project folder: Has files present
Bug Description:
When typing / or @ in the Claude Code desktop app input box, no autocomplete suggestions appear. This affects both built-in slash commands and file mentions.

What I've Tried:
Installed ripgrep (version 15.1.0 with PCRE2 10.45)
Set USE_BUILTIN_RIPGREP=0 environment variable
Complete uninstall and reinstall of desktop app
Cleared cache and project files
Restarted computer
Note: The terminal/CLI version of Claude Code works fine with autocomplete - this only affects the desktop app.

What Should Happen?

When typing @ followed directly by a filename (e.g., @README.md), the file IS recognized and attached correctly
This confirms the underlying functionality works - it's specifically the autocomplete dropdown/suggestions that are not appearing.

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce:

Open Claude Code desktop app on Windows
Open a project folder
Type / in the input box
Expected: Dropdown showing commands like /help, /clear, etc.
Actual: Nothing appears, just the / character
Additional Observations:

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.886 (ef5d26) 2026-01-24T18:00:47.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_