diff --git a/scripts/navka-core.sh b/scripts/navka-core.sh
new file mode 100644
index 0000000..9c8197f
--- /dev/null
+++ b/scripts/navka-core.sh
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# Proven Pi-5 configfs gadget: HID keyboard+mouse + stereo UAC2
+set -euo pipefail
+
+mountpoint -q /sys/kernel/config || mount -t configfs configfs /sys/kernel/config
+G=/sys/kernel/config/usb_gadget/navka
+
+[[ -d $G ]] && echo "" >"$G/UDC" && rm -rf "$G"
+
+mkdir -p "$G"
+echo 0x1d6b >"$G/idVendor"       # Linux Foundation
+echo 0x0104 >"$G/idProduct"      # Multifunction Composite Gadget
+echo 0x0200 >"$G/bcdUSB"
+
+mkdir -p "$G/strings/0x409"
+echo "0001"                 >"$G/strings/0x409/serialnumber"
+echo "Navka"                >"$G/strings/0x409/manufacturer"
+echo "Navka Composite"      >"$G/strings/0x409/product"
+
+# HID (boot keyboard)
+mkdir -p "$G/functions/hid.usb0"
+echo 1  >"$G/functions/hid.usb0/protocol"
+echo 1  >"$G/functions/hid.usb0/subclass"
+echo 8  >"$G/functions/hid.usb0/report_length"
+echo -ne '\x05\x01\x09\x06\xa1\x01\x05\x07\x19\xe0\x29\xe7\x15\x00\x25'\
+'\x01\x75\x01\x95\x08\x81\x02\x95\x01\x75\x08\x81\x01\x95\x05\x75\x01'\
+'\x05\x08\x19\x01\x29\x05\x91\x02\x95\x01\x75\x03\x91\x01\x95\x06\x75'\
+'\x08\x15\x00\x25\x65\x05\x07\x19\x00\x29\x65\x81\x00\xc0' \
+ >"$G/functions/hid.usb0/report_desc"
+
+# UAC2 stereo 48 kHz
+mkdir -p "$G/functions/uac2.usb0"
+echo 48000 >"$G/functions/uac2.usb0/c_srate"
+echo 2     >"$G/functions/uac2.usb0/c_ssize"
+echo 2     >"$G/functions/uac2.usb0/p_chmask"
+
+mkdir -p "$G/configs/c.1/strings/0x409"
+echo "Config 1" >"$G/configs/c.1/strings/0x409/configuration"
+echo 500        >"$G/configs/c.1/MaxPower"
+
+ln -s "$G/functions/hid.usb0"  "$G/configs/c.1/"
+ln -s "$G/functions/uac2.usb0" "$G/configs/c.1/"
+
+echo "$(ls /sys/class/udc | head -n1)" >"$G/UDC"