Capsem is a Rust hypervisor that sandboxes AI agents in air-gapped Linux VMs on your Mac, so you can ship fast with AI securely. It installs by download or a shell command, and works with Claude Code, Codex and Cursor through a setup prompt that walks your agent through creating an isolated environment.
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Agents run inside air-gapped Linux VMs rather than on your desktop.
Copy the setup prompt into Claude Code, Codex or Cursor.
Existing environments and security settings stay intact between runs.
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