[BUG] Search tool does not find files in workspace folders add with /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 have added extra include directories with /add-dir so that Claude Code can find the .h files for C++.
The directories are listed in the workspace folders if i call /add-dir without argument.
When Claude Code uses its search tool to find a specific header it is not found although it is available in one of the workspace directories.

What Should Happen?

Search tool should search across all registered workspace directories.

Error Messages/Logs

Steps to Reproduce

No specific workflow.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.1

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Running with the Shell from "Git for Windows".