An ESP32 radar presence alarm. The firmware "never registered a target" because the parser read byte 7 of each LD2410C frame for the data type, and that byte is always 0xAA, so every frame was thrown away. On the hardware side the BOM CSVs had to be "synced with the netlists (J4 is 3-pin, J7 charge input was missing)", and footprint names with commas split across columns. Two generator scripts "would overwrite the real KiCad files with empty ones" and were deleted.