diff --git a/quantum/process_keycode/process_rgb_matrix.c b/quantum/process_keycode/process_rgb_matrix.c
new file mode 100644
index 00000000000..fd2aa1a0c73
--- /dev/null
+++ b/quantum/process_keycode/process_rgb_matrix.c
@@ -0,0 +1,101 @@
+// Copyright 2024 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "process_rgb_matrix.h"
+#include "rgb_matrix.h"
+#include "action_util.h"
+#include "keycodes.h"
+#include "modifiers.h"
+
+bool process_rgb_matrix(uint16_t keycode, keyrecord_t *record) {
+#ifdef RGB_TRIGGER_ON_KEYDOWN
+    if (record->event.pressed) {
+#else
+    if (!record->event.pressed) {
+#endif
+        bool shifted = get_mods() & MOD_MASK_SHIFT;
+        switch (keycode) {
+            case QK_RGB_MATRIX_ON:
+                rgb_matrix_enable();
+                return false;
+            case QK_RGB_MATRIX_OFF:
+                rgb_matrix_disable();
+                return false;
+            case QK_RGB_MATRIX_TOGGLE:
+                rgb_matrix_toggle();
+                return false;
+            case QK_RGB_MATRIX_MODE_NEXT:
+                if (shifted) {
+                    rgb_matrix_step_reverse();
+                } else {
+                    rgb_matrix_step();
+                }
+                return false;
+            case QK_RGB_MATRIX_MODE_PREVIOUS:
+                if (shifted) {
+                    rgb_matrix_step();
+                } else {
+                    rgb_matrix_step_reverse();
+                }
+                return false;
+            case QK_RGB_MATRIX_HUE_UP:
+                if (shifted) {
+                    rgb_matrix_decrease_hue();
+                } else {
+                    rgb_matrix_increase_hue();
+                }
+                return false;
+            case QK_RGB_MATRIX_HUE_DOWN:
+                if (shifted) {
+                    rgb_matrix_increase_hue();
+                } else {
+                    rgb_matrix_decrease_hue();
+                }
+                return false;
+            case QK_RGB_MATRIX_SATURATION_UP:
+                if (shifted) {
+                    rgb_matrix_decrease_sat();
+                } else {
+                    rgb_matrix_increase_sat();
+                }
+                return false;
+            case QK_RGB_MATRIX_SATURATION_DOWN:
+                if (shifted) {
+                    rgb_matrix_increase_sat();
+                } else {
+                    rgb_matrix_decrease_sat();
+                }
+                return false;
+            case QK_RGB_MATRIX_VALUE_UP:
+                if (shifted) {
+                    rgb_matrix_decrease_val();
+                } else {
+                    rgb_matrix_increase_val();
+                }
+                return false;
+            case QK_RGB_MATRIX_VALUE_DOWN:
+                if (shifted) {
+                    rgb_matrix_increase_val();
+                } else {
+                    rgb_matrix_decrease_val();
+                }
+                return false;
+            case QK_RGB_MATRIX_SPEED_UP:
+                if (shifted) {
+                    rgb_matrix_decrease_speed();
+                } else {
+                    rgb_matrix_increase_speed();
+                }
+                return false;
+            case QK_RGB_MATRIX_SPEED_DOWN:
+                if (shifted) {
+                    rgb_matrix_increase_speed();
+                } else {
+                    rgb_matrix_decrease_speed();
+                }
+                return false;
+        }
+    }
+
+    return true;
+}
diff --git a/quantum/process_keycode/process_rgb_matrix.h b/quantum/process_keycode/process_rgb_matrix.h
new file mode 100644
index 00000000000..a02bf57b5f3
--- /dev/null
+++ b/quantum/process_keycode/process_rgb_matrix.h
@@ -0,0 +1,10 @@
+// Copyright 2024 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "action.h"
+
+bool process_rgb_matrix(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_underglow.c b/quantum/process_keycode/process_underglow.c
new file mode 100644
index 00000000000..779672ac076
--- /dev/null
+++ b/quantum/process_keycode/process_underglow.c
@@ -0,0 +1,91 @@
+// Copyright 2024 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "process_underglow.h"
+#include "rgblight.h"
+#include "action_util.h"
+#include "keycodes.h"
+#include "modifiers.h"
+
+bool process_underglow(uint16_t keycode, keyrecord_t *record) {
+    if (record->event.pressed) {
+        uint8_t shifted = get_mods() & MOD_MASK_SHIFT;
+        switch (keycode) {
+            case QK_UNDERGLOW_TOGGLE:
+                rgblight_toggle();
+                return false;
+            case QK_UNDERGLOW_MODE_NEXT:
+                if (shifted) {
+                    rgblight_step_reverse();
+                } else {
+                    rgblight_step();
+                }
+                return false;
+            case QK_UNDERGLOW_MODE_PREVIOUS:
+                if (shifted) {
+                    rgblight_step();
+                } else {
+                    rgblight_step_reverse();
+                }
+                return false;
+            case QK_UNDERGLOW_HUE_UP:
+                if (shifted) {
+                    rgblight_decrease_hue();
+                } else {
+                    rgblight_increase_hue();
+                }
+                return false;
+            case QK_UNDERGLOW_HUE_DOWN:
+                if (shifted) {
+                    rgblight_increase_hue();
+                } else {
+                    rgblight_decrease_hue();
+                }
+                return false;
+            case QK_UNDERGLOW_SATURATION_UP:
+                if (shifted) {
+                    rgblight_decrease_sat();
+                } else {
+                    rgblight_increase_sat();
+                }
+                return false;
+            case QK_UNDERGLOW_SATURATION_DOWN:
+                if (shifted) {
+                    rgblight_increase_sat();
+                } else {
+                    rgblight_decrease_sat();
+                }
+                return false;
+            case QK_UNDERGLOW_VALUE_UP:
+                if (shifted) {
+                    rgblight_decrease_val();
+                } else {
+                    rgblight_increase_val();
+                }
+                return false;
+            case QK_UNDERGLOW_VALUE_DOWN:
+                if (shifted) {
+                    rgblight_increase_hue();
+                } else {
+                    rgblight_decrease_hue();
+                }
+                return false;
+            case QK_UNDERGLOW_SPEED_UP:
+                if (shifted) {
+                    rgblight_decrease_speed();
+                } else {
+                    rgblight_increase_speed();
+                }
+                return false;
+            case QK_UNDERGLOW_SPEED_DOWN:
+                if (shifted) {
+                    rgblight_increase_speed();
+                } else {
+                    rgblight_decrease_speed();
+                }
+                return false;
+        }
+    }
+
+    return true;
+}
diff --git a/quantum/process_keycode/process_underglow.h b/quantum/process_keycode/process_underglow.h
new file mode 100644
index 00000000000..b409cafbb89
--- /dev/null
+++ b/quantum/process_keycode/process_underglow.h
@@ -0,0 +1,10 @@
+// Copyright 2024 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "action.h"
+
+bool process_underglow(uint16_t keycode, keyrecord_t *record);