[BUG] /ide command crashes with "onInstall is not defined" when auto-installing extension

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?

Running /ide crashes with onInstall is not defined when no IDE has the Claude Code extension installed and exactly one running IDE is detected.

In the /ide command handler (IR4), when exactly one running IDE is found and onInstallIDEExtension is available, an inline React component is created with a useEffect that calls:

function mR4() { onInstall(ideToInstall) }

onInstall and ideToInstall are local variables in the parent IR4 async function scope, but they aren't captured by the anonymous inline component's closure.

What Should Happen?

/ide should detect the running IDE, install the Claude Code extension/plugin, and prompt the user to restart their IDE — without crashing.

Error Messages/Logs

ERROR  onInstall is not defined

  /$bunfs/root/src/entrypoints/cli.js:3934:2548

   - mR4 (/$bunfs/root/src/entrypoints/cli.js:3934:2548)
   - O9 (/$bunfs/root/src/entrypoints/cli.js:564:63001)
   - bu (/$bunfs/root/src/entrypoints/cli.js:564:76032)
   - Eh (/$bunfs/root/src/entrypoints/cli.js:564:75914)
   - bu (/$bunfs/root/src/entrypoints/cli.js:564:76819)
   - Eh (/$bunfs/root/src/entrypoints/cli.js:564:75914)
   - bu (/$bunfs/root/src/entrypoints/cli.js:564:76011)
   - Eh (/$bunfs/root/src/entrypoints/cli.js:564:75914)
   - bu (/$bunfs/root/src/entrypoints/cli.js:564:76011)
   - Eh (/$bunfs/root/src/entrypoints/cli.js:564:75914)

Steps to Reproduce

1. Have an IDE running (e.g., VS Code) WITHOUT the Claude Code extension installed
2. Launch claude
3. Run /ide
4. Only one running IDE is detected, triggering the auto-install path
5. Crash: "onInstall is not defined"

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Unknown

Claude Code Version

2.1.70

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

AI Disclosure: I used Claude to help write this issue.