[BUG] file dropdown not showing for "(@" keys

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?

Currently if I type (@ , the file suggestions does show up.

What Should Happen?

Ideally it should show up.

Error Messages/Logs

NA

Steps to Reproduce

• Open claude code
• Type (@

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.81

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_