# When reTerminal (CM4) is connected in USB boot mode (eMMC disable jumper),
# Raspberry Pi Foundation USB device appears (vendor 2b8e). Trigger auto-flash.
# Install: sudo cp 90-cm4-boot-mode.rules /etc/udev/rules.d/
#          sudo udevadm control --reload-rules
# The trigger script starts the actual flash via systemd so udev does not block.

SUBSYSTEM=="usb", ATTR{idVendor}=="2b8e", ACTION=="add", \
  RUN+="/usr/local/bin/cm4-flash-trigger.sh"