IDE detection fails on Windows - /ide shows no available IDEs

[lhanks]

Description

The /ide command shows "No available IDEs detected" even though the Claude Code extension is installed and enabled in both VS Code and Cursor.

Environment

• OS: Windows (MINGW64_NT-10.0-26200)
• Claude Code CLI: v2.0.72 (npm-global)
• IDEs tested: VS Code and Cursor (both have Claude Code extension installed)
• Terminal: Running from IDE integrated terminal

Steps to Reproduce

1. Install Claude Code extension in VS Code/Cursor
2. Open IDE and verify extension is installed and enabled
3. Open integrated terminal in the IDE
4. Run claude
5. Run /ide

Expected Behavior

The IDE should be detected and listed as available for connection.

Actual Behavior

Shows: "No available IDEs detected. Make sure your IDE has the Claude Code extension or plugin installed and is running."

Troubleshooting Attempted

• Verified extension is installed and enabled in both IDEs
• Set "Claude Process Wrapper" setting to C:\Users\lesli\AppData\Roaming\npm\claude.cmd
• Added Cursor to Windows PATH
• Added firewall rule for ports 42000-44999
• Reinstalled extension
• Restarted IDEs multiple times
• Ran claude doctor - shows no issues

Extension Logs

The VS Code Output panel for Claude Code shows HTTP client errors:

2025-12-18T15:47:21.048Z [ERROR] "Error: Error\n    at <anonymous> (B:/~BUN/root/claude.exe:45:15236)\n    at <anonymous> (B:/~BUN/root/claude.exe:59:10263)\n    at emitError (node:events:43:23)\n    ...

Additional Context

• claude doctor output shows installation is healthy
• No IDE lock files are being created in ~/.claude/
• No ports in the 42000-44000 range are listening when checked with netstat
• The extension appears to not be starting its WebSocket server

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] VSCode integrated terminal cannot detect 'code' command - IDE connection fails (Windows) #13447
2. [BUG] Claude VSCode integration - IDE not found #12470
3. [BUG] Can't detect VS Code in integrated terminal on native Windows installation #5153

This issue will be automatically closed as a duplicate in 3 days.

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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #13447.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.