Caps word with tap-dance + hold-tap

[salamantos]

I'm trying to achieve the following behavior: on single tap it should produce F, on hold it should produce SHIFT, on double tap and hold (tap-hold) I want it to activate caps_word

However, with my current configuration, this is not working as expected. Instead, double tap and hold produce O for some reason. The single tap and single hold are working as intended.

/ {
    behaviors {
        hrm: home_row_modifier {
            compatible = "zmk,behavior-hold-tap";
            #binding-cells = <2>;
            flavor = "balanced";
            tapping-term-ms = <300>;
            quick-tap-ms = <0>;
            bindings = <&kp>, <&kp>;
        };

        hold_caps_word: hold_caps_word {
            compatible = "zmk,behavior-hold-tap";
            #binding-cells = <2>;
            flavor = "tap-preferred";
            tapping-term-ms = <300>;
            quick-tap-ms = <0>;
            bindings = <&kp>, <&kp>;
        };

        f_shft_caps: F_hold_SHIFT_doubletap_CAPS_WORD {
            compatible = "zmk,behavior-tap-dance";
            #binding-cells = <0>;
            tapping-term-ms = <300>;
            bindings = <&hrm LSHFT F>, <&hold_caps_word &caps_word F>;
        };
    };

    keymap {
        compatible = "zmk,keymap";
        default_layer {
            bindings = <
                ...    &f_shft_caps    ...
            >;
        };
    };
};

[caksoylar]

You cannot use other behavior references as parameters to a behavior: &hold_caps_word &caps_word F will result in a pseudorandom behavior because the &caps_word will be interpreted as a keycode. This is because you used bindings = <&kp>, <&kp>; in the hold_caps_word definition.

Instead, you need to use bindings = <&caps_word>, <&kp>; in the behavior definition, then use a dummy parameter value like 0 when using it: &hold_caps_word 0 F. This is documented here: https://zmk.dev/docs/keymaps/behaviors/hold-tap#using-different-behavior-types-with-hold-taps

[salamantos]

Thanks! It helped, now everything is working perfectly