zmk/app/tests/hold-tap/tap-preferred/behavior_keymap.dtsi

#include <dt-bindings/zmk/keys.h>
#include <behaviors.dtsi>
#include <dt-bindings/zmk/kscan_mock.h>

/ {
    behaviors {
        tp: behavior_tap_preferred {
            compatible = "zmk,behavior-hold-tap";
            label = "MOD_TAP";
            #binding-cells = <2>;
            flavor = "tap-preferred";
            tapping-term-ms = <300>;
            quick-tap-ms = <200>;
            bindings = <&kp>, <&kp>;
        };
    };

    keymap {
        compatible = "zmk,keymap";
        label ="Default keymap";

        default_layer {
            bindings = <
                &tp LEFT_SHIFT F &tp LEFT_CONTROL J
                &kp D &kp RIGHT_CONTROL>;
        };
    };
};