[BUG] next dev freezes macOS (beachball) on 8GB Mac when Claude Code starts dev server

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?

Title: next dev freezes macOS (beachball) on 8GB Mac when Claude Code starts dev server

Environment

Claude Code: 2.1.89
macOS: Darwin 25.3.0 (Apple Silicon / Intel — whichever you have)
RAM: 8 GB
Project: Next.js 16.2.3, React 19.2.4, Tailwind 4, TypeScript 5
What happened
Claude Code started next dev (localhost:3000) for my project at /Users/KimAir/Documents/Claude/Jobber 2026/projects/nextjs/soboxai. Within seconds the machine locked up with a spinning beachball and I had to force-restart.

Expected
The dev server should either start successfully or fail cleanly — it shouldn't take the OS down.

Impact
Can't use Claude Code's preview/dev server on this project. Forced to run builds manually in a separate terminal where I can kill them.

Request

Add a memory check before Claude auto-starts next dev on low-RAM machines, OR
Prompt the user before starting rather than auto-launching

What Should Happen?

next dev freezes macOS (beachball) on 8GB Mac when Claude Code starts dev server

Error Messages/Logs

Steps to Reproduce

next dev freezes macOS (beachball) on 8GB Mac when Claude Code starts dev server

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

next dev freezes macOS (beachball) on 8GB Mac when Claude Code starts dev server

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_