[BUG] Unable to detect working VS Code extension

Environment

• Platform (select one):
• [X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.31
• Operating System: Arch linux 6.15.3-arch1-1
• Terminal: Ghostty

Bug Description

When running /ide, I get the error: No available IDEs detected. This is despite the Claude Extension being successfully installed and running.

Steps to Reproduce

1. Launch VS Code from the terminal
2. Open the terminal in VS Code and run claude
3. Run the /ide command

Expected Behavior

IDE connection works.

Actual Behavior

No available IDEs detected. error.

Additional Context

The lock file in ~/.claude/ide is created successfully and appears to be valid. I am able to manually establish a connection to the plugin, so it does appear to be listening for incoming connections correctly.

I tried uninstalling the Claude extension and re-installing it, both by running the claude command from the in-IDE terminal per the instructions and by manually installing the extension.

I verified the extension and the CLI match in version.

The IDE integration previously worked for me before a recent update.