Claude
b4b4fde78d
Pick a hypervisor based on the host's actual nested-virt capability
instead of always using QEMU/HVF (which doesn't expose nested KVM):
* Apple Silicon M3+ on macOS 15 Sequoia+: QEMU/HVF with
-cpu host,el2=on so the Linux guest's KVM (and therefore
firecracker microVMs) actually works.
* Intel Mac: VirtualBox with --nested-hw-virt on. Cask is
installed on demand; the seed ISO and SSH key flow are shared
with the QEMU path.
* Apple Silicon M1/M2 (any macOS), or M3+ pre-Sequoia: skip the
whole VM step and print a notice pointing at a Linux cloud VM
as the only path to firecracker on that hardware.
Backend selection is centralized in _select_vm_backend(); the rest
of setup_firecracker_vm (image download/verify, cloud-init seed,
SSH wait, in-VM firecracker probe, zsh wrapper) is shared.
https://claude.ai/code/session_01R2CnCeEBYT5QoHiwxczDNq