append_dtb=true makes boot-deploy concatenate the raw DTB onto the gzip'd kernel Image inside boot.img. arm64 has no appended-DTB support; the trailing bytes corrupt the kernel load -> instant panic. GKI v4 devices put the DTB only in vendor_boot (--dtb); the kernel stays plain. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QF5HebjUsRaxbW4cBX6HJP