Our boot.img had os_version=0. The stock image is 16.0.0 / 2026-08 and the Motorola bootloader does anti-rollback on the boot image security patch level - a 0 value is below the stored minimum and gets rejected (instant reboot). Match the stock values via bootimg_custom_args. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QF5HebjUsRaxbW4cBX6HJP