[BUG] @mentioning files doesn't autocomplete for files with spaces in the filename (desktop app)
[!NOTE] Resubmission of #64932, which was closed as "not planned" without resolution. The bug is still present and affects real workflows (e.g. Obsidian vaults, docs folders) where spaces in filenames are the norm.
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?
When I @mentioning files in claude code in the desktop app, it doesn't autocomplete for files with spaces in the filename.
In claude code in the cli, I can do @"My file with spaces" and it will autocomplete.
In claude code in the desktop app, I can get autocompletion for @My but as @My closes the autocomplete. Using double quotes with @mentions in the desktop app does not work at all.
The is less an issue for software coding use cases where the convention is usually not have spaces in file names. But for other use cases such as obsidian.md interaction, spaces in filenames are common.
What Should Happen?
In claude code desktop I should be able to @"My file with spaces" and it will autocomplete.
Error Messages/Logs
Steps to Reproduce
In claude code in the desktop app, try to @mention a file with spaces in the filename.
Claude Model
Opus
Is this a regression?
No, this never worked
Last Working Version
_No response_
Claude Code Version
Claude 1.19367.0 (1a5be1) 2026-07-07T05:45:41.000Z
Platform
Anthropic API
Operating System
macOS
Terminal/Shell
Terminal.app (macOS)
Additional Information
Original report: #64932 (closed as not planned)