[BUG] ⎿ TypeError: .split is not a function. (In '.split(/(\n|\r\n)/)', '_.split' is undefined)

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?

⎿ TypeError: .split is not a function. (In '.split(/(\n|\r\n)/)', '_.split' is undefined)
use /insight happened

What Should Happen?

⎿ TypeError: .split is not a function. (In '.split(/(\n|\r\n)/)', '_.split' is undefined)

Error Messages/Logs

⎿  TypeError: .split is not a function. (In '.split(/(\n|\r\n)/)', '_.split' is undefined)

Steps to Reproduce

⎿ TypeError: .split is not a function. (In '.split(/(\n|\r\n)/)', '_.split' is undefined)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

latest

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_