IDE connection not working when running from VS Code terminal since v2.1.13

Bug Description

Since version 2.1.13, Claude Code CLI fails to connect to the IDE when launched from the VS Code integrated terminal.

Steps to Reproduce

1. Open VS Code
2. Open the integrated terminal (Ctrl+`)
3. Run claude command
4. IDE connection fails / not detected

Expected Behavior

Claude Code should detect and connect to VS Code IDE when launched from VS Code's integrated terminal.

Actual Behavior

IDE connection is not established. Claude Code does not recognize it's running inside VS Code.

Environment

• Claude Code version: 2.1.13+
• IDE: VS Code
• OS: Windows

Additional Context

This issue started occurring after updating to version 2.1.13. Previous versions worked correctly with VS Code terminal.