Firecracker-class microVMs for dev: 13-microvm-setup.sh (idempotent installer) + microvm CLI + microvm-net.service (per-user tap pools, /30s, NAT). Debian 13 cloud assets in /usr/local/lib/microvm/base. Firecracker v1.16.1 installed but its KVM cap check is refused by this nested Westmere KVM; qemu -M microvm engine default, FC retry after #601. Details + UAT: https://projects.knownelement.com/issues/615