[BUG] vm_bundles/claudevm.bundle consumes ~10 GB on macOS, destroying available disk space

Summary

The Claude Code sandbox VM bundle (~/Library/Application Support/Claude/vm_bundles/claudevm.bundle) occupies 9.7 GB on disk. On a MacBook with limited SSD space this is catastrophic — it filled the drive to near-capacity and caused OS-level failures (ENOSPC errors in unrelated tools).

Environment

• macOS Darwin 25.5.0
• Claude Code (VSCode extension / desktop app)

Steps to reproduce

1. Install Claude Code and use it for any session with sandboxed execution enabled
2. Check ~/Library/Application Support/Claude/vm_bundles/

Observed

9.7G    /Users/.../Library/Application Support/Claude/vm_bundles/claudevm.bundle

Expected

A sandboxed VM image should not require ~10 GB. Comparable tools (Lima, OrbStack, Docker Desktop's base image) use 1–2 GB at most for a lightweight Linux VM.

Impact

• Disk full — drove available space to near zero, causing unrelated tools to fail with ENOSPC
• No warning — there is no UI indication that Claude Code is consuming this much space
• No cleanup — the bundle persists even when sandbox is not actively in use

Suggestions

1. Reduce the VM image size significantly
2. Show a disk-usage warning during install or first run
3. Provide a built-in cleanup command (claude sandbox purge or similar)
4. Document the disk requirement prominently