[BUG] Context of selected lines doesn't gets attached for some file paths

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?

In claude code's vs code extension , while using nextjs as a framework, we often use [slug] pattern for dynamic routes. For any new file created inside that folder , if I select some lines , they are not being reflected as lines being selected in claude code extension.I even confirmed this by asking the model if it can see any lines selected.To which , it replied a clear no .

<img width="1918" height="1023" alt="Image" src="https://github.com/user-attachments/assets/44eff21f-b2fa-4db0-92e0-b2a782444a34" />

What Should Happen?

Lines selected should be reflected and passed to claude code.

Error Messages/Logs

I have attached a screenshot for reference.

Steps to Reproduce

Create a dynamic folder in nextjs framework with [slug] pattern.
Create any new file inside it.
Add some text and try to select that text and pass to claude code.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.119

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_