[BUG] VS Code extension: active file context not injected when submitting a slash command

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?

The active file context (ide_opened_file) is not injected into the conversation when a message is a slash command (e.g. /code-review), even after switching to a file in the editor. Claude has no way to know which file is open.

What Should Happen?

The currently open file should be passed as context regardless of whether the message is a slash command or regular typed text.

Error Messages/Logs

Steps to Reproduce

1. Open a file in VS Code
2. In the Claude Code panel, submit a slash command without any additional text
3. Claude does not receive the active file context

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

VS Code extension v2.1.116

Platform

Other

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

File context is correctly injected when the same message includes typed text alongside the slash command. The issue is specific to messages that are slash commands only.