[BUG] @file references don't work in directories added w/ `/add-dir`

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?

I've added a dir w/ /add-dir. Using @file doesn't show the dir's files. If I type in the file name manually, CC doesn't locate the file w/o searching for it.

What Should Happen?

The file picker should show the file. Given a file name, CC should be able to read the file w/o searching.

Error Messages/Logs

Steps to Reproduce

/add-dir my-dir

Mention the file: @file

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.19 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_