These packages are required for Claude Code's native sandboxing on Linux:
- bubblewrap: Provides filesystem isolation via Linux namespaces
- socat: Enables the network proxy for domain filtering
Without these, the /sandbox command shows installation instructions
instead of enabling sandbox mode.
Ref: https://code.claude.com/docs/en/sandboxing
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>