Fix ZFS boot failure and update ISO naming format

Bug fixes:
- Fix depmod using wrong kernel version during initramfs generation
  The script now explicitly specifies the installed kernel version
  instead of relying on uname -r (which returns the live ISO kernel)
- Add kernel module verification before mkinitcpio
- Add hostid 0x prefix to spl.spl_hostid kernel parameter

ISO naming:
- Changed format to: archzfs-vmlinuz-{version}-lts-{date}-{arch}.iso
- Example: archzfs-vmlinuz-6.12.65-lts-2026-01-18-x86_64.iso

test-vm.sh:
- Add QEMU monitor socket for automation support

3 files changed, 46 insertions, 2 deletions

diff --git a/build.sh b/build.sh
index 9e2be40..dd334d3 100755
--- a/build.sh
+++ b/build.sh
@@ -130,9 +130,21 @@ fzf
 dialog
 EOF
 
+# Get kernel version for ISO naming
+info "Querying kernel version..."
+KERNEL_VER=$(pacman -Si linux-lts 2>/dev/null | grep "^Version" | awk '{print $3}' | cut -d- -f1)
+if [[ -z "$KERNEL_VER" ]]; then
+    KERNEL_VER="unknown"
+    warn "Could not determine kernel version, using 'unknown'"
+fi
+info "LTS Kernel version: $KERNEL_VER"
+
 # Update profiledef.sh with our ISO name
 info "Updating ISO metadata..."
-sed -i 's/^iso_name=.*/iso_name="archzfs-claude"/' "$PROFILE_DIR/profiledef.sh"
+# Format: archzfs-vmlinuz-6.12.65-lts-2026-01-18-x86_64.iso
+ISO_DATE=$(date +%Y-%m-%d)
+sed -i "s/^iso_name=.*/iso_name=\"archzfs-vmlinuz-${KERNEL_VER}-lts\"/" "$PROFILE_DIR/profiledef.sh"
+sed -i "s/^iso_version=.*/iso_version=\"${ISO_DATE}\"/" "$PROFILE_DIR/profiledef.sh"
 
 # Create airootfs directories
 mkdir -p "$PROFILE_DIR/airootfs/usr/local/bin"
diff --git a/custom/install-archzfs b/custom/install-archzfs
index 6b62d90..dfba090 100755
--- a/custom/install-archzfs
+++ b/custom/install-archzfs
@@ -949,6 +949,25 @@ configure_initramfs() {
     # ZFS doesn't use fsck - remove it to avoid confusing error messages
     sed -i 's/^HOOKS=.*/HOOKS=(base udev autodetect microcode modconf kms keyboard keymap consolefont block zfs filesystems)/' /mnt/etc/mkinitcpio.conf
 
+    # Get the installed kernel version (not the running kernel)
+    local kernel_ver
+    kernel_ver=$(ls /mnt/usr/lib/modules | grep lts | head -1)
+    if [[ -z "$kernel_ver" ]]; then
+        error "Could not find LTS kernel modules"
+    fi
+    info "Installed kernel: $kernel_ver"
+
+    # Ensure kernel module dependencies are up to date after DKMS build
+    # Must specify kernel version since running kernel differs from installed kernel
+    info "Updating module dependencies..."
+    arch-chroot /mnt depmod "$kernel_ver"
+
+    # Verify ZFS module exists
+    if ! [[ -f "/mnt/usr/lib/modules/$kernel_ver/updates/dkms/zfs.ko.zst" ]]; then
+        error "ZFS module not found! DKMS build may have failed."
+    fi
+    info "ZFS module verified for kernel $kernel_ver"
+
     info "Regenerating initramfs..."
     arch-chroot /mnt mkinitcpio -P
 }
@@ -966,7 +985,7 @@ GRUB_DEFAULT=0
 GRUB_TIMEOUT=5
 GRUB_DISTRIBUTOR="Arch Linux (ZFS)"
 GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3"
-GRUB_CMDLINE_LINUX="root=ZFS=$POOL_NAME/ROOT/default spl.spl_hostid=$host_id"
+GRUB_CMDLINE_LINUX="root=ZFS=$POOL_NAME/ROOT/default spl.spl_hostid=0x$host_id"
 GRUB_PRELOAD_MODULES="part_gpt part_msdos zfs"
 GRUB_TERMINAL_OUTPUT="console"
 GRUB_DISABLE_OS_PROBER=true
diff --git a/scripts/test-vm.sh b/scripts/test-vm.sh
index c5ff5e8..4c56570 100755
--- a/scripts/test-vm.sh
+++ b/scripts/test-vm.sh
@@ -29,6 +29,9 @@ OVMF_CODE="/usr/share/edk2/x64/OVMF_CODE.4m.fd"
 OVMF_VARS_ORIG="/usr/share/edk2/x64/OVMF_VARS.4m.fd"
 OVMF_VARS="$VM_DIR/OVMF_VARS.fd"
 
+# QEMU monitor socket for automation
+MONITOR_SOCKET="$VM_DIR/qemu-monitor.sock"
+
 # Colors
 RED='\033[0;31m'
 GREEN='\033[0;32m'
@@ -138,8 +141,12 @@ boot_iso() {
     echo "  - Serial console output appears in this terminal"
     echo "  - SSH: ssh -p 2222 root@localhost (password: archzfs)"
     echo "  - Run 'install-archzfs' to start installation"
+    echo "  - Monitor socket: $MONITOR_SOCKET"
     echo ""
 
+    # Remove stale monitor socket
+    rm -f "$MONITOR_SOCKET"
+
     # Build disk arguments
     local disk_args=(-drive "file=$VM_DISK,format=qcow2,if=virtio")
     if [[ "$MULTI_DISK" == true ]]; then
@@ -165,6 +172,7 @@ boot_iso() {
         -device virtio-vga-gl \
         -display gtk,gl=on \
         -serial mon:stdio \
+        -monitor unix:"$MONITOR_SOCKET",server,nowait \
         -audiodev pipewire,id=audio0 \
         -device ich9-intel-hda \
         -device hda-duplex,audiodev=audio0 \
@@ -194,8 +202,12 @@ boot_disk() {
     echo ""
     echo "SSH access: ssh -p 2222 root@localhost"
     echo "Serial console output appears in this terminal"
+    echo "Monitor socket: $MONITOR_SOCKET"
     echo ""
 
+    # Remove stale monitor socket
+    rm -f "$MONITOR_SOCKET"
+
     # Build disk arguments
     local disk_args=(-drive "file=$VM_DISK,format=qcow2,if=virtio")
     if [[ "$MULTI_DISK" == true ]]; then
@@ -220,6 +232,7 @@ boot_disk() {
         -device virtio-vga-gl \
         -display gtk,gl=on \
         -serial mon:stdio \
+        -monitor unix:"$MONITOR_SOCKET",server,nowait \
         -audiodev pipewire,id=audio0 \
         -device ich9-intel-hda \
         -device hda-duplex,audiodev=audio0 \