39 files changed, 1886 insertions, 1000 deletions

diff --git a/quantum/backlight/backlight.c b/quantum/backlight/backlight.c
index 708022f68..e57b31d10 100644
--- a/quantum/backlight/backlight.c
+++ b/quantum/backlight/backlight.c
@@ -21,6 +21,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 backlight_config_t backlight_config;
 
+// TODO: migrate to backlight_config_t
+static uint8_t breathing_period = BREATHING_PERIOD;
+
 /** \brief Backlight initialization
  *
  * FIXME: needs doc
@@ -191,3 +194,21 @@ void backlight_disable_breathing(void) {
  */
 bool is_backlight_breathing(void) { return backlight_config.breathing; }
 #endif
+
+// following are marked as weak purely for backwards compatibility
+__attribute__((weak)) void breathing_period_set(uint8_t value) { breathing_period = value ? value : 1; }
+
+__attribute__((weak)) uint8_t get_breathing_period(void) { return breathing_period; }
+
+__attribute__((weak)) void breathing_period_default(void) { breathing_period_set(BREATHING_PERIOD); }
+
+__attribute__((weak)) void breathing_period_inc(void) { breathing_period_set(breathing_period + 1); }
+
+__attribute__((weak)) void breathing_period_dec(void) { breathing_period_set(breathing_period - 1); }
+
+// defaults for backlight api
+__attribute__((weak)) void backlight_init_ports(void) {}
+
+__attribute__((weak)) void backlight_set(uint8_t level) {}
+
+__attribute__((weak)) void backlight_task(void) {}
diff --git a/quantum/backlight/backlight.h b/quantum/backlight/backlight.h
index 1e581055d..9f0a5e81d 100644
--- a/quantum/backlight/backlight.h
+++ b/quantum/backlight/backlight.h
@@ -41,22 +41,39 @@ typedef union {
 } backlight_config_t;
 
 void    backlight_init(void);
-void    backlight_increase(void);
-void    backlight_decrease(void);
 void    backlight_toggle(void);
 void    backlight_enable(void);
 void    backlight_disable(void);
 bool    is_backlight_enabled(void);
 void    backlight_step(void);
-void    backlight_set(uint8_t level);
+void    backlight_increase(void);
+void    backlight_decrease(void);
 void    backlight_level(uint8_t level);
 uint8_t get_backlight_level(void);
 
+// implementation specific
+void backlight_init_ports(void);
+void backlight_set(uint8_t level);
+void backlight_task(void);
+
 #ifdef BACKLIGHT_BREATHING
+
 void backlight_toggle_breathing(void);
 void backlight_enable_breathing(void);
 void backlight_disable_breathing(void);
 bool is_backlight_breathing(void);
+
+void    breathing_period_set(uint8_t value);
+uint8_t get_breathing_period(void);
+void    breathing_period_default(void);
+void    breathing_period_inc(void);
+void    breathing_period_dec(void);
+
+// implementation specific
 void breathing_enable(void);
 void breathing_disable(void);
+void breathing_toggle(void);
+bool is_breathing(void);
+void breathing_pulse(void);
+void breathing_task(void);
 #endif
diff --git a/quantum/backlight/backlight_arm.c b/quantum/backlight/backlight_arm.c
index 3f94ccef8..f7065906f 100644
--- a/quantum/backlight/backlight_arm.c
+++ b/quantum/backlight/backlight_arm.c
@@ -10,10 +10,6 @@
 #        error "Backlight support for STMF072 is not available. Please disable."
 #    endif
 
-#    if defined(STM32F1XX) || defined(STM32F1xx)
-#        define USE_GPIOV1
-#    endif
-
 // GPIOV2 && GPIOV3
 #    ifndef BACKLIGHT_PAL_MODE
 #        define BACKLIGHT_PAL_MODE 2
@@ -110,7 +106,6 @@ void backlight_task(void) {}
 #    define BREATHING_HALT_ON 2
 #    define BREATHING_STEPS 128
 
-static uint8_t  breathing_period  = BREATHING_PERIOD;
 static uint8_t  breathing_halt    = BREATHING_NO_HALT;
 static uint16_t breathing_counter = 0;
 
@@ -118,7 +113,7 @@ bool is_breathing(void) { return BACKLIGHT_PWM_DRIVER.config == &pwmCFG_breathin
 
 static inline void breathing_min(void) { breathing_counter = 0; }
 
-static inline void breathing_max(void) { breathing_counter = breathing_period * 256 / 2; }
+static inline void breathing_max(void) { breathing_counter = get_breathing_period() * 256 / 2; }
 
 void breathing_interrupt_enable(void) {
     pwmStop(&BACKLIGHT_PWM_DRIVER);
@@ -170,17 +165,6 @@ void breathing_toggle(void) {
         breathing_enable();
 }
 
-void breathing_period_set(uint8_t value) {
-    if (!value) value = 1;
-    breathing_period = value;
-}
-
-void breathing_period_default(void) { breathing_period_set(BREATHING_PERIOD); }
-
-void breathing_period_inc(void) { breathing_period_set(breathing_period + 1); }
-
-void breathing_period_dec(void) { breathing_period_set(breathing_period - 1); }
-
 /* To generate breathing curve in python:
  * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
  */
@@ -191,7 +175,8 @@ static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS
 
 static void breathing_callback(PWMDriver *pwmp) {
     (void)pwmp;
-    uint16_t interval = (uint16_t)breathing_period * 256 / BREATHING_STEPS;
+    uint8_t  breathing_period = get_breathing_period();
+    uint16_t interval         = (uint16_t)breathing_period * 256 / BREATHING_STEPS;
     // resetting after one period to prevent ugly reset at overflow.
     breathing_counter = (breathing_counter + 1) % (breathing_period * 256);
     uint8_t index     = breathing_counter / interval % BREATHING_STEPS;
@@ -207,12 +192,4 @@ static void breathing_callback(PWMDriver *pwmp) {
     chSysUnlockFromISR();
 }
 
-#else
-
-__attribute__((weak)) void backlight_init_ports(void) {}
-
-__attribute__((weak)) void backlight_set(uint8_t level) {}
-
-__attribute__((weak)) void backlight_task(void) {}
-
 #endif
diff --git a/quantum/backlight/backlight_avr.c b/quantum/backlight/backlight_avr.c
index edda6ea0b..7cf1e0fb3 100644
--- a/quantum/backlight/backlight_avr.c
+++ b/quantum/backlight/backlight_avr.c
@@ -206,7 +206,7 @@ static const pin_t backlight_pin = BACKLIGHT_PIN;
 #    endif
 
 #    ifdef NO_HARDWARE_PWM
-__attribute__((weak)) void backlight_init_ports(void) {
+void backlight_init_ports(void) {
     // Setup backlight pin as output and output to on state.
     FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
 
@@ -217,8 +217,6 @@ __attribute__((weak)) void backlight_init_ports(void) {
 #        endif
 }
 
-__attribute__((weak)) void backlight_set(uint8_t level) {}
-
 uint8_t backlight_tick = 0;
 
 #        ifndef BACKLIGHT_CUSTOM_DRIVER
@@ -303,7 +301,7 @@ static uint16_t cie_lightness(uint16_t v) {
 static inline void set_pwm(uint16_t val) { OCRxx = val; }
 
 #        ifndef BACKLIGHT_CUSTOM_DRIVER
-__attribute__((weak)) void backlight_set(uint8_t level) {
+void backlight_set(uint8_t level) {
     if (level > BACKLIGHT_LEVELS) level = BACKLIGHT_LEVELS;
 
     if (level == 0) {
@@ -342,7 +340,6 @@ void backlight_task(void) {}
 #            define BREATHING_HALT_ON 2
 #            define BREATHING_STEPS 128
 
-static uint8_t breathing_period = BREATHING_PERIOD;
 static uint8_t breathing_halt = BREATHING_NO_HALT;
 static uint16_t breathing_counter = 0;
 
@@ -377,9 +374,9 @@ bool is_breathing(void) { return !!(TIMSKx & _BV(TOIEx)); }
                 do {                       \
                     breathing_counter = 0; \
                 } while (0)
-#            define breathing_max()                                 \
-                do {                                                \
-                    breathing_counter = breathing_period * 244 / 2; \
+#            define breathing_max()                                       \
+                do {                                                      \
+                    breathing_counter = get_breathing_period() * 244 / 2; \
                 } while (0)
 
 void breathing_enable(void) {
@@ -417,17 +414,6 @@ void breathing_toggle(void) {
         breathing_enable();
 }
 
-void breathing_period_set(uint8_t value) {
-    if (!value) value = 1;
-    breathing_period = value;
-}
-
-void breathing_period_default(void) { breathing_period_set(BREATHING_PERIOD); }
-
-void breathing_period_inc(void) { breathing_period_set(breathing_period + 1); }
-
-void breathing_period_dec(void) { breathing_period_set(breathing_period - 1); }
-
 /* To generate breathing curve in python:
  * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
  */
@@ -445,6 +431,7 @@ void breathing_task(void)
 ISR(TIMERx_OVF_vect)
 #            endif
 {
+    uint8_t breathing_period = get_breathing_period();
     uint16_t interval = (uint16_t)breathing_period * 244 / BREATHING_STEPS;
     // resetting after one period to prevent ugly reset at overflow.
     breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
@@ -459,7 +446,7 @@ ISR(TIMERx_OVF_vect)
 
 #        endif  // BACKLIGHT_BREATHING
 
-__attribute__((weak)) void backlight_init_ports(void) {
+void backlight_init_ports(void) {
     // Setup backlight pin as output and output to on state.
     FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
 
@@ -500,10 +487,4 @@ __attribute__((weak)) void backlight_init_ports(void) {
 
 #    endif  // hardware backlight
 
-#else  // no backlight
-
-__attribute__((weak)) void backlight_init_ports(void) {}
-
-__attribute__((weak)) void backlight_set(uint8_t level) {}
-
-#endif  // backlight
\ No newline at end of file
+#endif  // backlight
diff --git a/quantum/backlight/backlight_soft.c b/quantum/backlight/backlight_soft.c
index a6aba7782..096b41d91 100644
--- a/quantum/backlight/backlight_soft.c
+++ b/quantum/backlight/backlight_soft.c
@@ -10,7 +10,7 @@
 #endif
 
 #ifndef BACKLIGHT_ON_STATE
-#    define BACKLIGHT_ON_STATE 0
+#    define BACKLIGHT_ON_STATE 1
 #endif
 
 #ifdef BACKLIGHT_PINS
@@ -20,6 +20,7 @@
         { BACKLIGHT_PIN }
 #endif
 
+static uint16_t    s_duty_pattern   = 0;
 static const pin_t backlight_pins[] = BACKLIGHT_PIN_INIT;
 #define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
 
@@ -46,14 +47,38 @@ void backlight_off(pin_t backlight_pin) {
 }
 
 void backlight_init_ports(void) {
-    // Setup backlight pin as output and output to on state.
-    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
+    // Setup backlight pin as output and output to off state.
+    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
 }
 
+// clang-format off
+
+/** \brief PWM duty patterns
+ *
+ * We scale the current backlight level to an index within this array. This allows
+ * backlight_task to focus on just switching LEDs on/off, and we can predict the duty pattern
+ */
+static uint16_t backlight_duty_table[] = {
+    0b0000000000000000,
+    0b1000000000000000,
+    0b1000000010000000,
+    0b1000001000010000,
+    0b1000100010001000,
+    0b1001001001001000,
+    0b1010101010101010,
+    0b1110111011101110,
+    0b1111111111111111,
+};
+#define backlight_duty_table_size (sizeof(backlight_duty_table) / sizeof(backlight_duty_table[0]))
+
+// clang-format on
+
+static uint8_t scale_backlight(uint8_t v) { return v * (backlight_duty_table_size - 1) / BACKLIGHT_LEVELS; }
+
 void backlight_task(void) {
     static uint8_t backlight_tick = 0;
 
-    if ((0xFFFF >> (get_backlight_level() * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) {
+    if (s_duty_pattern & ((uint16_t)1 << backlight_tick)) {
         FOR_EACH_LED(backlight_on(backlight_pin);)
     } else {
         FOR_EACH_LED(backlight_off(backlight_pin);)
@@ -61,6 +86,4 @@ void backlight_task(void) {
     backlight_tick = (backlight_tick + 1) % 16;
 }
 
-void backlight_set(uint8_t level) {
-    // noop as backlight_task uses get_backlight_level()
-}
+void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }
diff --git a/quantum/color.c b/quantum/color.c
index 1f398e240..8bd52444f 100644
--- a/quantum/color.c
+++ b/quantum/color.c
@@ -85,3 +85,17 @@ RGB hsv_to_rgb(HSV hsv) {
 
     return rgb;
 }
+
+#ifdef RGBW
+#ifndef MIN
+#    define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+void convert_rgb_to_rgbw(LED_TYPE *led) {
+    // Determine lowest value in all three colors, put that into
+    // the white channel and then shift all colors by that amount
+    led->w = MIN(led->r, MIN(led->g, led->b));
+    led->r -= led->w;
+    led->g -= led->w;
+    led->b -= led->w;
+}
+#endif
diff --git a/quantum/color.h b/quantum/color.h
index 678164662..58d4f0407 100644
--- a/quantum/color.h
+++ b/quantum/color.h
@@ -64,5 +64,7 @@ typedef struct PACKED {
 #endif
 
 RGB hsv_to_rgb(HSV hsv);
-
+#ifdef RGBW
+void convert_rgb_to_rgbw(LED_TYPE *led);
+#endif
 #endif  // COLOR_H
diff --git a/quantum/dynamic_keymap.c b/quantum/dynamic_keymap.c
index ca056f630..11d28592d 100644
--- a/quantum/dynamic_keymap.c
+++ b/quantum/dynamic_keymap.c
@@ -20,28 +20,37 @@
 #include "progmem.h"  // to read default from flash
 #include "quantum.h"  // for send_string()
 #include "dynamic_keymap.h"
-
-#ifdef DYNAMIC_KEYMAP_ENABLE
-
-#    ifndef DYNAMIC_KEYMAP_EEPROM_ADDR
-#        error DYNAMIC_KEYMAP_EEPROM_ADDR not defined
-#    endif
-
-#    ifndef DYNAMIC_KEYMAP_LAYER_COUNT
-#        error DYNAMIC_KEYMAP_LAYER_COUNT not defined
-#    endif
-
-#    ifndef DYNAMIC_KEYMAP_MACRO_COUNT
-#        error DYNAMIC_KEYMAP_MACRO_COUNT not defined
-#    endif
-
-#    ifndef DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR
-#        error DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR not defined
-#    endif
-
-#    ifndef DYNAMIC_KEYMAP_MACRO_EEPROM_SIZE
-#        error DYNAMIC_KEYMAP_MACRO_EEPROM_SIZE not defined
-#    endif
+#include "via.h" // for default VIA_EEPROM_ADDR_END
+
+#ifndef DYNAMIC_KEYMAP_LAYER_COUNT
+#   define DYNAMIC_KEYMAP_LAYER_COUNT 4
+#endif
+
+#ifndef DYNAMIC_KEYMAP_MACRO_COUNT
+#   define DYNAMIC_KEYMAP_MACRO_COUNT 16
+#endif
+
+// If DYNAMIC_KEYMAP_EEPROM_ADDR not explicitly defined in config.h,
+// default it start after VIA_EEPROM_CUSTOM_ADDR+VIA_EEPROM_CUSTOM_SIZE
+#ifndef DYNAMIC_KEYMAP_EEPROM_ADDR
+#   ifdef VIA_EEPROM_CUSTOM_CONFIG_ADDR
+#       define DYNAMIC_KEYMAP_EEPROM_ADDR (VIA_EEPROM_CUSTOM_CONFIG_ADDR+VIA_EEPROM_CUSTOM_CONFIG_SIZE)
+#   else
+#       error DYNAMIC_KEYMAP_EEPROM_ADDR not defined
+#   endif 
+#endif
+
+// Dynamic macro starts after dynamic keymaps
+#ifndef DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR
+#   define DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR (DYNAMIC_KEYMAP_EEPROM_ADDR+(DYNAMIC_KEYMAP_LAYER_COUNT*MATRIX_ROWS*MATRIX_COLS*2))
+#endif
+
+// Dynamic macro uses up all remaining memory
+// Assumes 1K EEPROM on ATMega32U4
+// Override for anything different
+#ifndef DYNAMIC_KEYMAP_MACRO_EEPROM_SIZE
+#   define DYNAMIC_KEYMAP_MACRO_EEPROM_SIZE (1024-DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR)
+#endif
 
 uint8_t dynamic_keymap_get_layer_count(void) { return DYNAMIC_KEYMAP_LAYER_COUNT; }
 
@@ -208,5 +217,3 @@ void dynamic_keymap_macro_send(uint8_t id) {
         send_string(data);
     }
 }
-
-#endif  // DYNAMIC_KEYMAP_ENABLE
diff --git a/quantum/encoder.c b/quantum/encoder.c
index 4aeb3d0cd..c41b89f49 100644
--- a/quantum/encoder.c
+++ b/quantum/encoder.c
@@ -37,8 +37,8 @@ static pin_t encoders_pad_b[] = ENCODERS_PAD_B;
 
 static int8_t encoder_LUT[] = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
 
-static uint8_t encoder_state[NUMBER_OF_ENCODERS]  = {0};
-static int8_t  encoder_pulses[NUMBER_OF_ENCODERS] = {0};
+static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
+static int8_t encoder_pulses[NUMBER_OF_ENCODERS] = {0};
 
 #ifdef SPLIT_KEYBOARD
 // right half encoders come over as second set of encoders
@@ -79,27 +79,27 @@ void encoder_init(void) {
 }
 
 static void encoder_update(int8_t index, uint8_t state) {
-    encoder_pulses[index] += encoder_LUT[state & 0xF];
-    if (encoder_pulses[index] >= ENCODER_RESOLUTION) {
+    uint8_t i = index;
+#ifdef SPLIT_KEYBOARD
+    index += thisHand;
+#endif
+    encoder_pulses[i] += encoder_LUT[state & 0xF];
+    if (encoder_pulses[i] >= ENCODER_RESOLUTION) {
         encoder_value[index]++;
         encoder_update_kb(index, true);
     }
-    if (encoder_pulses[index] <= -ENCODER_RESOLUTION) {  // direction is arbitrary here, but this clockwise
+    if (encoder_pulses[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
         encoder_value[index]--;
         encoder_update_kb(index, false);
     }
-    encoder_pulses[index] %= ENCODER_RESOLUTION;
+    encoder_pulses[i] %= ENCODER_RESOLUTION;
 }
 
 void encoder_read(void) {
-    for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
+    for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
         encoder_state[i] <<= 2;
         encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
-#if SPLIT_KEYBOARD
-        encoder_update(i + thisHand, encoder_state[i]);
-#else
         encoder_update(i, encoder_state[i]);
-#endif
     }
 }
 
@@ -107,9 +107,9 @@ void encoder_read(void) {
 void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, &encoder_value[thisHand], sizeof(uint8_t) * NUMBER_OF_ENCODERS); }
 
 void encoder_update_raw(uint8_t* slave_state) {
-    for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
+    for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
         uint8_t index = i + thatHand;
-        int8_t  delta = slave_state[i] - encoder_value[index];
+        int8_t delta = slave_state[i] - encoder_value[index];
         while (delta > 0) {
             delta--;
             encoder_value[index]++;
diff --git a/quantum/keymap_common.c b/quantum/keymap_common.c
index 4fa45ac37..c82c44639 100644
--- a/quantum/keymap_common.c
+++ b/quantum/keymap_common.c
@@ -48,13 +48,10 @@ action_t action_for_key(uint8_t layer, keypos_t key) {
     // keycode remapping
     keycode = keycode_config(keycode);
 
-    action_t action;
+    action_t action = {};
     uint8_t  action_layer, when, mod;
 
     switch (keycode) {
-        case KC_FN0 ... KC_FN31:
-            action.code = keymap_function_id_to_action(FN_INDEX(keycode));
-            break;
         case KC_A ... KC_EXSEL:
         case KC_LCTRL ... KC_RGUI:
             action.code = ACTION_KEY(keycode);
@@ -65,9 +62,11 @@ action_t action_for_key(uint8_t layer, keypos_t key) {
         case KC_AUDIO_MUTE ... KC_BRIGHTNESS_DOWN:
             action.code = ACTION_USAGE_CONSUMER(KEYCODE2CONSUMER(keycode));
             break;
+#ifdef MOUSEKEY_ENABLE
         case KC_MS_UP ... KC_MS_ACCEL2:
             action.code = ACTION_MOUSEKEY(keycode);
             break;
+#endif
         case KC_TRNS:
             action.code = ACTION_TRANSPARENT;
             break;
@@ -76,17 +75,24 @@ action_t action_for_key(uint8_t layer, keypos_t key) {
             // Split it up
             action.code = ACTION_MODS_KEY(keycode >> 8, keycode & 0xFF);  // adds modifier to key
             break;
+#ifndef NO_ACTION_FUNCTION
+        case KC_FN0 ... KC_FN31:
+            action.code = keymap_function_id_to_action(FN_INDEX(keycode));
+            break;
         case QK_FUNCTION ... QK_FUNCTION_MAX:;
             // Is a shortcut for function action_layer, pull last 12bits
             // This means we have 4,096 FN macros at our disposal
             action.code = keymap_function_id_to_action((int)keycode & 0xFFF);
             break;
+#endif
+#ifndef NO_ACTION_MACRO
         case QK_MACRO ... QK_MACRO_MAX:
             if (keycode & 0x800)  // tap macros have upper bit set
                 action.code = ACTION_MACRO_TAP(keycode & 0xFF);
             else
                 action.code = ACTION_MACRO(keycode & 0xFF);
             break;
+#endif
         case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
             action.code = ACTION_LAYER_TAP_KEY((keycode >> 0x8) & 0xF, keycode & 0xFF);
             break;
diff --git a/quantum/matrix.c b/quantum/matrix.c
index 907492a0f..1675f2477 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -17,34 +17,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdint.h>
 #include <stdbool.h>
 #include "wait.h"
-#include "print.h"
-#include "debug.h"
 #include "util.h"
 #include "matrix.h"
 #include "debounce.h"
 #include "quantum.h"
 
-#if (MATRIX_COLS <= 8)
-#    define print_matrix_header() print("\nr/c 01234567\n")
-#    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop(matrix[i])
-#    define ROW_SHIFTER ((uint8_t)1)
-#elif (MATRIX_COLS <= 16)
-#    define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
-#    define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop16(matrix[i])
-#    define ROW_SHIFTER ((uint16_t)1)
-#elif (MATRIX_COLS <= 32)
-#    define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
-#    define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop32(matrix[i])
-#    define ROW_SHIFTER ((uint32_t)1)
-#endif
-
-#ifdef MATRIX_MASKED
-extern const matrix_row_t matrix_mask[];
-#endif
-
 #ifdef DIRECT_PINS
 static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
@@ -53,61 +30,10 @@ static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 #endif
 
 /* matrix state(1:on, 0:off) */
-static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
-static matrix_row_t matrix[MATRIX_ROWS];      // debounced values
-
-__attribute__((weak)) void matrix_init_quantum(void) { matrix_init_kb(); }
-
-__attribute__((weak)) void matrix_scan_quantum(void) { matrix_scan_kb(); }
-
-__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
-__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
-__attribute__((weak)) void matrix_init_user(void) {}
-
-__attribute__((weak)) void matrix_scan_user(void) {}
-
-inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
-
-inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
-
-// Deprecated.
-bool matrix_is_modified(void) {
-    if (debounce_active()) return false;
-    return true;
-}
-
-inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
-
-inline matrix_row_t matrix_get_row(uint8_t row) {
-    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
-    // switch blocker installed and the switch is always pressed.
-#ifdef MATRIX_MASKED
-    return matrix[row] & matrix_mask[row];
-#else
-    return matrix[row];
-#endif
-}
-
-void matrix_print(void) {
-    print_matrix_header();
-
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        phex(row);
-        print(": ");
-        print_matrix_row(row);
-        print("\n");
-    }
-}
-
-uint8_t matrix_key_count(void) {
-    uint8_t count = 0;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        count += matrix_bitpop(i);
-    }
-    return count;
-}
+// matrix code
 
 #ifdef DIRECT_PINS
 
@@ -129,7 +55,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
         pin_t pin = direct_pins[current_row][col_index];
         if (pin != NO_PIN) {
-            current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
+            current_matrix[current_row] |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
         }
     }
 
@@ -175,7 +101,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
         uint8_t pin_state = readPin(col_pins[col_index]);
 
         // Populate the matrix row with the state of the col pin
-        current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
+        current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
     }
 
     // Unselect row
@@ -221,10 +147,10 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
         // Check row pin state
         if (readPin(row_pins[row_index]) == 0) {
             // Pin LO, set col bit
-            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
+            current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
         } else {
             // Pin HI, clear col bit
-            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+            current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
         }
 
         // Determine if the matrix changed state
diff --git a/quantum/matrix_common.c b/quantum/matrix_common.c
new file mode 100644
index 000000000..c326e59ca
--- /dev/null
+++ b/quantum/matrix_common.c
@@ -0,0 +1,107 @@
+#include "matrix.h"
+#include "debounce.h"
+#include "print.h"
+#include "debug.h"
+
+/* matrix state(1:on, 0:off) */
+matrix_row_t raw_matrix[MATRIX_ROWS];
+matrix_row_t matrix[MATRIX_ROWS];
+
+#ifdef MATRIX_MASKED
+extern const matrix_row_t matrix_mask[];
+#endif
+
+// user-defined overridable functions
+
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+
+__attribute__((weak)) void matrix_init_user(void) {}
+
+__attribute__((weak)) void matrix_scan_user(void) {}
+
+// helper functions
+
+inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
+
+inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
+
+inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+    // switch blocker installed and the switch is always pressed.
+#ifdef MATRIX_MASKED
+    return matrix[row] & matrix_mask[row];
+#else
+    return matrix[row];
+#endif
+}
+
+// Deprecated.
+bool matrix_is_modified(void) {
+    if (debounce_active()) return false;
+    return true;
+}
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header() print("\nr/c 01234567\n")
+#    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop(matrix_get_row(row))
+#elif (MATRIX_COLS <= 16)
+#    define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
+#    define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop16(matrix_get_row(row))
+#elif (MATRIX_COLS <= 32)
+#    define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#    define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
+#    define matrix_bitpop(row) bitpop32(matrix_get_row(row))
+#endif
+
+void matrix_print(void) {
+    print_matrix_header();
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row);
+        print(": ");
+        print_matrix_row(row);
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void) {
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += matrix_bitpop(i);
+    }
+    return count;
+}
+
+// CUSTOM MATRIX 'LITE'
+__attribute__((weak)) void matrix_init_custom(void) {}
+
+__attribute__((weak)) bool matrix_scan_custom(matrix_row_t current_matrix[]) { return true; }
+
+__attribute__((weak)) void matrix_init(void) {
+    matrix_init_custom();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        raw_matrix[i] = 0;
+        matrix[i]     = 0;
+    }
+
+    debounce_init(MATRIX_ROWS);
+
+    matrix_init_quantum();
+}
+
+__attribute__((weak)) uint8_t matrix_scan(void) {
+    bool changed = matrix_scan_custom(raw_matrix);
+
+    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+    matrix_scan_quantum();
+    return changed;
+}
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index 6815a0d8a..bddafa6a4 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -1,9 +1,15 @@
 ifneq ($(findstring STM32F303, $(MCU)),)
+  # Cortex version
+  MCU = cortex-m4
+
+  # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+  ARMV = 7
+
   ## chip/board settings
   # - the next two should match the directories in
   #   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
-  MCU_FAMILY ?= STM32
-  MCU_SERIES ?= STM32F3xx
+  MCU_FAMILY = STM32
+  MCU_SERIES = STM32F3xx
 
   # Linker script to use
   # - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
@@ -18,22 +24,110 @@ ifneq ($(findstring STM32F303, $(MCU)),)
   # <keyboard_dir>/boards/, or drivers/boards/
   BOARD ?= GENERIC_STM32_F303XC
 
+  USE_FPU ?= yes
+
+  # Options to pass to dfu-util when flashing
+  DFU_ARGS ?= -d 0483:df11 -a 0 -s 0x08000000:leave
+  DFU_SUFFIX_ARGS ?= -v 0483 -p df11
+endif
+
+ifneq ($(findstring STM32F072, $(MCU)),)
   # Cortex version
-  MCU = cortex-m4
+  MCU = cortex-m0
 
   # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
-  ARMV ?= 7
+  ARMV = 6
 
-  USE_FPU = yes
+  ## chip/board settings
+  # - the next two should match the directories in
+  #   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+  MCU_FAMILY = STM32
+  MCU_SERIES = STM32F0xx
 
-  # Vector table for application
-  # 0x00000000-0x00001000 area is occupied by bootloader.*/
-  # The CORTEX_VTOR... is needed only for MCHCK/Infinity KB
-  # OPT_DEFS = -DCORTEX_VTOR_INIT=0x08005000
+  # Linker script to use
+  # - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+  #   or <keyboard_dir>/ld/
+  MCU_LDSCRIPT ?= STM32F072xB
+
+  # Startup code to use
+  #  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
+  MCU_STARTUP ?= stm32f0xx
+
+  # Board: it should exist either in <chibios>/os/hal/boards/,
+  # <keyboard_dir>/boards/, or drivers/boards/
+  BOARD ?= ST_STM32F072B_DISCOVERY
+
+  USE_FPU ?= no
 
   # Options to pass to dfu-util when flashing
   DFU_ARGS ?= -d 0483:df11 -a 0 -s 0x08000000:leave
-  DFU_SUFFIX_ARGS = -p DF11 -v 0483
+  DFU_SUFFIX_ARGS ?= -v 0483 -p df11
+endif
+
+ifneq ($(findstring STM32F042, $(MCU)),)
+  # Cortex version
+  MCU = cortex-m0
+
+  # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+  ARMV = 6
+
+  ## chip/board settings
+  # - the next two should match the directories in
+  #   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+  MCU_FAMILY = STM32
+  MCU_SERIES = STM32F0xx
+
+  # Linker script to use
+  # - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+  #   or <keyboard_dir>/ld/
+  MCU_LDSCRIPT ?= STM32F042x6
+
+  # Startup code to use
+  #  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
+  MCU_STARTUP ?= stm32f0xx
+
+  # Board: it should exist either in <chibios>/os/hal/boards/,
+  # <keyboard_dir>/boards/, or drivers/boards/
+  BOARD ?= GENERIC_STM32_F042X6
+
+  USE_FPU ?= no
+
+  # Options to pass to dfu-util when flashing
+  DFU_ARGS ?= -d 0483:df11 -a 0 -s 0x08000000:leave
+  DFU_SUFFIX_ARGS ?= -v 0483 -p df11
+endif
+
+ifneq ($(findstring STM32F103, $(MCU)),)
+  # Cortex version
+  MCU = cortex-m3
+
+  # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+  ARMV = 7
+
+  ## chip/board settings
+  # - the next two should match the directories in
+  #   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+  MCU_FAMILY = STM32
+  MCU_SERIES = STM32F1xx
+
+  # Linker script to use
+  # - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+  #   or <keyboard_dir>/ld/
+  MCU_LDSCRIPT ?= STM32F103x8
+
+  # Startup code to use
+  #  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
+  MCU_STARTUP ?= stm32f1xx
+
+  # Board: it should exist either in <chibios>/os/hal/boards/,
+  # <keyboard_dir>/boards/, or drivers/boards/
+  BOARD ?= GENERIC_STM32_F103
+
+  USE_FPU ?= no
+
+  # Options to pass to dfu-util when flashing
+  DFU_ARGS ?= -d 0483:df11 -a 0 -s 0x08000000:leave
+  DFU_SUFFIX_ARGS ?= -v 0483 -p df11
 endif
 
 ifneq (,$(filter $(MCU),atmega16u2 atmega32u2 atmega16u4 atmega32u4 at90usb646 at90usb1286))
@@ -75,6 +169,9 @@ ifneq (,$(filter $(MCU),atmega16u2 atmega32u2 atmega16u4 atmega32u4 at90usb646 a
 endif
 
 ifneq (,$(filter $(MCU),atmega32a))
+  # MCU name for avrdude
+  AVRDUDE_MCU = m32
+
   PROTOCOL = VUSB
 
   # Processor frequency.
@@ -87,12 +184,12 @@ ifneq (,$(filter $(MCU),atmega32a))
   # unsupported features for now
   NO_UART ?= yes
   NO_SUSPEND_POWER_DOWN ?= yes
-
-  # Programming options
-  PROGRAM_CMD ?= ./util/atmega32a_program.py $(TARGET).hex
 endif
 
 ifneq (,$(filter $(MCU),atmega328p))
+  # MCU name for avrdude
+  AVRDUDE_MCU = m328p
+
   PROTOCOL = VUSB
 
   # Processor frequency.
diff --git a/quantum/process_keycode/process_magic.c b/quantum/process_keycode/process_magic.c
new file mode 100644
index 000000000..44dd5f057
--- /dev/null
+++ b/quantum/process_keycode/process_magic.c
@@ -0,0 +1,178 @@
+/* Copyright 2019 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "process_magic.h"
+
+#ifdef AUDIO_ENABLE
+#    ifndef AG_NORM_SONG
+#        define AG_NORM_SONG SONG(AG_NORM_SOUND)
+#    endif
+#    ifndef AG_SWAP_SONG
+#        define AG_SWAP_SONG SONG(AG_SWAP_SOUND)
+#    endif
+#    ifndef CG_NORM_SONG
+#        define CG_NORM_SONG SONG(AG_NORM_SOUND)
+#    endif
+#    ifndef CG_SWAP_SONG
+#        define CG_SWAP_SONG SONG(AG_SWAP_SOUND)
+#    endif
+float ag_norm_song[][2] = AG_NORM_SONG;
+float ag_swap_song[][2] = AG_SWAP_SONG;
+float cg_norm_song[][2] = CG_NORM_SONG;
+float cg_swap_song[][2] = CG_SWAP_SONG;
+#endif
+
+/**
+ * MAGIC actions (BOOTMAGIC without the boot)
+ */
+bool process_magic(uint16_t keycode, keyrecord_t *record) {
+    // skip anything that isn't a keyup
+    if (record->event.pressed) {
+        switch (keycode) {
+            case MAGIC_SWAP_CONTROL_CAPSLOCK ... MAGIC_TOGGLE_ALT_GUI:
+            case MAGIC_SWAP_LCTL_LGUI ... MAGIC_EE_HANDS_RIGHT:
+                /* keymap config */
+                keymap_config.raw = eeconfig_read_keymap();
+                switch (keycode) {
+                    case MAGIC_SWAP_CONTROL_CAPSLOCK:
+                        keymap_config.swap_control_capslock = true;
+                        break;
+                    case MAGIC_CAPSLOCK_TO_CONTROL:
+                        keymap_config.capslock_to_control = true;
+                        break;
+                    case MAGIC_SWAP_LALT_LGUI:
+                        keymap_config.swap_lalt_lgui = true;
+                        break;
+                    case MAGIC_SWAP_RALT_RGUI:
+                        keymap_config.swap_ralt_rgui = true;
+                        break;
+                    case MAGIC_SWAP_LCTL_LGUI:
+                        keymap_config.swap_lctl_lgui = true;
+                        break;
+                    case MAGIC_SWAP_RCTL_RGUI:
+                        keymap_config.swap_rctl_rgui = true;
+                        break;
+                    case MAGIC_NO_GUI:
+                        keymap_config.no_gui = true;
+                        break;
+                    case MAGIC_SWAP_GRAVE_ESC:
+                        keymap_config.swap_grave_esc = true;
+                        break;
+                    case MAGIC_SWAP_BACKSLASH_BACKSPACE:
+                        keymap_config.swap_backslash_backspace = true;
+                        break;
+                    case MAGIC_HOST_NKRO:
+                        clear_keyboard();  // clear first buffer to prevent stuck keys
+                        keymap_config.nkro = true;
+                        break;
+                    case MAGIC_SWAP_ALT_GUI:
+                        keymap_config.swap_lalt_lgui = keymap_config.swap_ralt_rgui = true;
+#ifdef AUDIO_ENABLE
+                        PLAY_SONG(ag_swap_song);
+#endif
+                        break;
+                    case MAGIC_SWAP_CTL_GUI:
+                        keymap_config.swap_lctl_lgui = keymap_config.swap_rctl_rgui = true;
+#ifdef AUDIO_ENABLE
+                        PLAY_SONG(cg_swap_song);
+#endif
+                        break;
+                    case MAGIC_UNSWAP_CONTROL_CAPSLOCK:
+                        keymap_config.swap_control_capslock = false;
+                        break;
+                    case MAGIC_UNCAPSLOCK_TO_CONTROL:
+                        keymap_config.capslock_to_control = false;
+                        break;
+                    case MAGIC_UNSWAP_LALT_LGUI:
+                        keymap_config.swap_lalt_lgui = false;
+                        break;
+                    case MAGIC_UNSWAP_RALT_RGUI:
+                        keymap_config.swap_ralt_rgui = false;
+                        break;
+                    case MAGIC_UNSWAP_LCTL_LGUI:
+                        keymap_config.swap_lctl_lgui = false;
+                        break;
+                    case MAGIC_UNSWAP_RCTL_RGUI:
+                        keymap_config.swap_rctl_rgui = false;
+                        break;
+                    case MAGIC_UNNO_GUI:
+                        keymap_config.no_gui = false;
+                        break;
+                    case MAGIC_UNSWAP_GRAVE_ESC:
+                        keymap_config.swap_grave_esc = false;
+                        break;
+                    case MAGIC_UNSWAP_BACKSLASH_BACKSPACE:
+                        keymap_config.swap_backslash_backspace = false;
+                        break;
+                    case MAGIC_UNHOST_NKRO:
+                        clear_keyboard();  // clear first buffer to prevent stuck keys
+                        keymap_config.nkro = false;
+                        break;
+                    case MAGIC_UNSWAP_ALT_GUI:
+                        keymap_config.swap_lalt_lgui = keymap_config.swap_ralt_rgui = false;
+#ifdef AUDIO_ENABLE
+                        PLAY_SONG(ag_norm_song);
+#endif
+                        break;
+                    case MAGIC_UNSWAP_CTL_GUI:
+                        keymap_config.swap_lctl_lgui = keymap_config.swap_rctl_rgui = false;
+#ifdef AUDIO_ENABLE
+                        PLAY_SONG(cg_norm_song);
+#endif
+                        break;
+                    case MAGIC_TOGGLE_ALT_GUI:
+                        keymap_config.swap_lalt_lgui = !keymap_config.swap_lalt_lgui;
+                        keymap_config.swap_ralt_rgui = keymap_config.swap_lalt_lgui;
+#ifdef AUDIO_ENABLE
+                        if (keymap_config.swap_ralt_rgui) {
+                            PLAY_SONG(ag_swap_song);
+                        } else {
+                            PLAY_SONG(ag_norm_song);
+                        }
+#endif
+                        break;
+                    case MAGIC_TOGGLE_CTL_GUI:
+                        keymap_config.swap_lctl_lgui = !keymap_config.swap_lctl_lgui;
+                        keymap_config.swap_rctl_rgui = keymap_config.swap_lctl_lgui;
+#ifdef AUDIO_ENABLE
+                        if (keymap_config.swap_rctl_rgui) {
+                            PLAY_SONG(cg_swap_song);
+                        } else {
+                            PLAY_SONG(cg_norm_song);
+                        }
+#endif
+                        break;
+                    case MAGIC_TOGGLE_NKRO:
+                        clear_keyboard();  // clear first buffer to prevent stuck keys
+                        keymap_config.nkro = !keymap_config.nkro;
+                        break;
+                    case MAGIC_EE_HANDS_LEFT:
+                        eeconfig_update_handedness(true);
+                        break;
+                    case MAGIC_EE_HANDS_RIGHT:
+                        eeconfig_update_handedness(false);
+                        break;
+                }
+
+                eeconfig_update_keymap(keymap_config.raw);
+                clear_keyboard();  // clear to prevent stuck keys
+
+                return false;
+        }
+    }
+
+    // Not a magic keycode so continue processing
+    return true;
+}
diff --git a/quantum/process_keycode/process_magic.h b/quantum/process_keycode/process_magic.h
new file mode 100644
index 000000000..1eb39f145
--- /dev/null
+++ b/quantum/process_keycode/process_magic.h
@@ -0,0 +1,20 @@
+/* Copyright 2019
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+bool process_magic(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_rgb.c b/quantum/process_keycode/process_rgb.c
new file mode 100644
index 000000000..c76166342
--- /dev/null
+++ b/quantum/process_keycode/process_rgb.c
@@ -0,0 +1,141 @@
+/* Copyright 2019
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "process_rgb.h"
+#include "rgb.h"
+
+typedef void (*rgb_func_pointer)(void);
+
+/**
+ * Wrapper for inc/dec rgb keycode
+ * 
+ * noinline to optimise for firmware size not speed (not in hot path) 
+ */
+static void __attribute__((noinline)) handleKeycodeRGB(const uint8_t is_shifted, const rgb_func_pointer inc_func, const rgb_func_pointer dec_func) {
+    if (is_shifted) {
+        dec_func();
+    } else {
+        inc_func();
+    }
+}
+
+/**
+ * Wrapper for animation mode
+ *   - if not in animation family -> jump to that animation
+ *   - otherwise -> wrap round animation speed
+ * 
+ * noinline to optimise for firmware size not speed (not in hot path) 
+ */
+static void __attribute__((noinline,unused)) handleKeycodeRGBMode(const uint8_t start, const uint8_t end) {
+    if ((start <= rgblight_get_mode()) && (rgblight_get_mode() < end)) {
+        rgblight_step();
+    } else {
+        rgblight_mode(start);
+    }
+}
+
+/**
+ * Handle keycodes for both rgblight and rgbmatrix
+ */
+bool process_rgb(const uint16_t keycode, const keyrecord_t *record) {
+#ifndef SPLIT_KEYBOARD
+    if (record->event.pressed) {
+#else
+    // Split keyboards need to trigger on key-up for edge-case issue
+    if (!record->event.pressed) {
+#endif
+        uint8_t shifted = get_mods() & (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT));
+        switch (keycode) {
+            case RGB_TOG:
+                rgblight_toggle();
+                return false;
+            case RGB_MODE_FORWARD:
+                handleKeycodeRGB(shifted, rgblight_step, rgblight_step_reverse);
+                return false;
+            case RGB_MODE_REVERSE:
+                handleKeycodeRGB(shifted, rgblight_step_reverse, rgblight_step);
+                return false;
+            case RGB_HUI:
+                handleKeycodeRGB(shifted, rgblight_increase_hue, rgblight_decrease_hue);
+                return false;
+            case RGB_HUD:
+                handleKeycodeRGB(shifted, rgblight_decrease_hue, rgblight_increase_hue);
+                return false;
+            case RGB_SAI:
+                handleKeycodeRGB(shifted, rgblight_increase_sat, rgblight_decrease_sat);
+                return false;
+            case RGB_SAD:
+                handleKeycodeRGB(shifted, rgblight_decrease_sat, rgblight_increase_sat);
+                return false;
+            case RGB_VAI:
+                handleKeycodeRGB(shifted, rgblight_increase_val, rgblight_decrease_val);
+                return false;
+            case RGB_VAD:
+                handleKeycodeRGB(shifted, rgblight_decrease_val, rgblight_increase_val);
+                return false;
+            case RGB_SPI:
+                handleKeycodeRGB(shifted, rgblight_increase_speed, rgblight_decrease_speed);
+                return false;
+            case RGB_SPD:
+                handleKeycodeRGB(shifted, rgblight_decrease_speed, rgblight_increase_speed);
+                return false;
+            case RGB_MODE_PLAIN:
+                rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
+                return false;
+            case RGB_MODE_BREATHE:
+#ifdef RGBLIGHT_EFFECT_BREATHING
+                handleKeycodeRGBMode(RGBLIGHT_MODE_BREATHING, RGBLIGHT_MODE_BREATHING_end);
+#endif
+                return false;
+            case RGB_MODE_RAINBOW:
+#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
+                handleKeycodeRGBMode(RGBLIGHT_MODE_RAINBOW_MOOD, RGBLIGHT_MODE_RAINBOW_MOOD_end);
+#endif
+                return false;
+            case RGB_MODE_SWIRL:
+#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
+                handleKeycodeRGBMode(RGBLIGHT_MODE_RAINBOW_SWIRL, RGBLIGHT_MODE_RAINBOW_SWIRL_end);
+#endif
+                return false;
+            case RGB_MODE_SNAKE:
+#ifdef RGBLIGHT_EFFECT_SNAKE
+                handleKeycodeRGBMode(RGBLIGHT_MODE_SNAKE, RGBLIGHT_MODE_SNAKE_end);
+#endif
+                return false;
+            case RGB_MODE_KNIGHT:
+#ifdef RGBLIGHT_EFFECT_KNIGHT
+                handleKeycodeRGBMode(RGBLIGHT_MODE_KNIGHT, RGBLIGHT_MODE_KNIGHT_end);
+#endif
+                return false;
+            case RGB_MODE_XMAS:
+#ifdef RGBLIGHT_EFFECT_CHRISTMAS
+                rgblight_mode(RGBLIGHT_MODE_CHRISTMAS);
+#endif
+                return false;
+            case RGB_MODE_GRADIENT:
+#ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
+                handleKeycodeRGBMode(RGBLIGHT_MODE_STATIC_GRADIENT, RGBLIGHT_MODE_STATIC_GRADIENT_end);
+#endif
+                return false;
+            case RGB_MODE_RGBTEST:
+#ifdef RGBLIGHT_EFFECT_RGB_TEST
+                rgblight_mode(RGBLIGHT_MODE_RGB_TEST);
+#endif
+                return false;
+        }
+    }
+
+    return true;
+}
diff --git a/quantum/process_keycode/process_rgb.h b/quantum/process_keycode/process_rgb.h
new file mode 100644
index 000000000..26aca4689
--- /dev/null
+++ b/quantum/process_keycode/process_rgb.h
@@ -0,0 +1,20 @@
+/* Copyright 2019
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+bool process_rgb(const uint16_t keycode, const keyrecord_t *record);
diff --git a/quantum/process_keycode/process_steno.c b/quantum/process_keycode/process_steno.c
index e0b33ec86..57e279f21 100644
--- a/quantum/process_keycode/process_steno.c
+++ b/quantum/process_keycode/process_steno.c
@@ -73,7 +73,9 @@ static void steno_clear_state(void) {
 static void send_steno_state(uint8_t size, bool send_empty) {
     for (uint8_t i = 0; i < size; ++i) {
         if (chord[i] || send_empty) {
+#ifdef VIRTSER_ENABLE
             virtser_send(chord[i]);
+#endif
         }
     }
 }
@@ -105,7 +107,9 @@ static void send_steno_chord(void) {
         switch (mode) {
             case STENO_MODE_BOLT:
                 send_steno_state(BOLT_STATE_SIZE, false);
+#ifdef VIRTSER_ENABLE
                 virtser_send(0);  // terminating byte
+#endif
                 break;
             case STENO_MODE_GEMINI:
                 chord[0] |= 0x80;  // Indicate start of packet
diff --git a/quantum/process_keycode/process_steno.h b/quantum/process_keycode/process_steno.h
index 367542372..ed049eb13 100644
--- a/quantum/process_keycode/process_steno.h
+++ b/quantum/process_keycode/process_steno.h
@@ -18,10 +18,6 @@
 
 #include "quantum.h"
 
-#if defined(STENO_ENABLE) && !defined(VIRTSER_ENABLE)
-#    error "must have virtser enabled to use steno"
-#endif
-
 typedef enum { STENO_MODE_BOLT, STENO_MODE_GEMINI } steno_mode_t;
 
 bool     process_steno(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_terminal.c b/quantum/process_keycode/process_terminal.c
index f48f3d702..7d1eefa9e 100644
--- a/quantum/process_keycode/process_terminal.c
+++ b/quantum/process_keycode/process_terminal.c
@@ -61,7 +61,7 @@ void enable_terminal(void) {
     memset(cmd_buffer, 0, CMD_BUFF_SIZE * 80);
     for (int i = 0; i < 6; i++) strcpy(arguments[i], "");
     // select all text to start over
-    // SEND_STRING(SS_LCTRL("a"));
+    // SEND_STRING(SS_LCTL("a"));
     send_string(terminal_prompt);
 }
 
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 2e5e6376b..9cd50b11d 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -16,10 +16,6 @@
 
 #include "quantum.h"
 
-#if !defined(RGBLIGHT_ENABLE) && !defined(RGB_MATRIX_ENABLE)
-#    include "rgb.h"
-#endif
-
 #ifdef PROTOCOL_LUFA
 #    include "outputselect.h"
 #endif
@@ -57,26 +53,13 @@ extern backlight_config_t backlight_config;
 #    ifndef GOODBYE_SONG
 #        define GOODBYE_SONG SONG(GOODBYE_SOUND)
 #    endif
-#    ifndef AG_NORM_SONG
-#        define AG_NORM_SONG SONG(AG_NORM_SOUND)
-#    endif
-#    ifndef AG_SWAP_SONG
-#        define AG_SWAP_SONG SONG(AG_SWAP_SOUND)
-#    endif
-#    ifndef CG_NORM_SONG
-#        define CG_NORM_SONG SONG(AG_NORM_SOUND)
-#    endif
-#    ifndef CG_SWAP_SONG
-#        define CG_SWAP_SONG SONG(AG_SWAP_SOUND)
-#    endif
 float goodbye_song[][2] = GOODBYE_SONG;
-float ag_norm_song[][2] = AG_NORM_SONG;
-float ag_swap_song[][2] = AG_SWAP_SONG;
-float cg_norm_song[][2] = CG_NORM_SONG;
-float cg_swap_song[][2] = CG_SWAP_SONG;
 #    ifdef DEFAULT_LAYER_SONGS
 float default_layer_songs[][16][2] = DEFAULT_LAYER_SONGS;
 #    endif
+#    ifdef SENDSTRING_BELL
+float bell_song[][2] = SONG(TERMINAL_SOUND);
+#    endif
 #endif
 
 static void do_code16(uint16_t code, void (*f)(uint8_t)) {
@@ -164,11 +147,6 @@ void reset_keyboard(void) {
     bootloader_jump();
 }
 
-/* true if the last press of GRAVE_ESC was shifted (i.e. GUI or SHIFT were pressed), false otherwise.
- * Used to ensure that the correct keycode is released if the key is released.
- */
-static bool grave_esc_was_shifted = false;
-
 /* Convert record into usable keycode via the contained event. */
 uint16_t get_record_keycode(keyrecord_t *record) { return get_event_keycode(record->event); }
 
@@ -235,6 +213,9 @@ bool process_record_quantum(keyrecord_t *record) {
 #if defined(RGB_MATRIX_ENABLE)
             process_rgb_matrix(keycode, record) &&
 #endif
+#if defined(VIA_ENABLE)
+            process_record_via(keycode, record) &&
+#endif
             process_record_kb(keycode, record) &&
 #if defined(MIDI_ENABLE) && defined(MIDI_ADVANCED)
             process_midi(keycode, record) &&
@@ -272,402 +253,77 @@ bool process_record_quantum(keyrecord_t *record) {
 #ifdef SPACE_CADET_ENABLE
             process_space_cadet(keycode, record) &&
 #endif
+#ifdef MAGIC_KEYCODE_ENABLE
+            process_magic(keycode, record) &&
+#endif
+#if defined(RGBLIGHT_ENABLE) || defined(RGB_MATRIX_ENABLE)
+            process_rgb(keycode, record) &&
+#endif
             true)) {
         return false;
     }
 
-    // Shift / paren setup
-
-    switch (keycode) {
-        case RESET:
-            if (record->event.pressed) {
+    if (record->event.pressed) {
+        switch (keycode) {
+            case RESET:
                 reset_keyboard();
-            }
-            return false;
-        case DEBUG:
-            if (record->event.pressed) {
+                return false;
+#ifndef NO_DEBUG
+            case DEBUG:
                 debug_enable ^= 1;
                 if (debug_enable) {
                     print("DEBUG: enabled.\n");
                 } else {
                     print("DEBUG: disabled.\n");
                 }
-            }
-            return false;
-        case EEPROM_RESET:
-            if (record->event.pressed) {
+#endif
+                return false;
+            case EEPROM_RESET:
                 eeconfig_init();
-            }
-            return false;
+                return false;
 #ifdef FAUXCLICKY_ENABLE
-        case FC_TOG:
-            if (record->event.pressed) {
+            case FC_TOG:
                 FAUXCLICKY_TOGGLE;
-            }
-            return false;
-        case FC_ON:
-            if (record->event.pressed) {
+                return false;
+            case FC_ON:
                 FAUXCLICKY_ON;
-            }
-            return false;
-        case FC_OFF:
-            if (record->event.pressed) {
+                return false;
+            case FC_OFF:
                 FAUXCLICKY_OFF;
-            }
-            return false;
+                return false;
 #endif
-#if defined(RGBLIGHT_ENABLE) || defined(RGB_MATRIX_ENABLE)
-        case RGB_TOG:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_toggle();
-            }
-            return false;
-        case RGB_MODE_FORWARD:
-            if (record->event.pressed) {
-                uint8_t shifted = get_mods() & (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT));
-                if (shifted) {
-                    rgblight_step_reverse();
-                } else {
-                    rgblight_step();
-                }
-            }
-            return false;
-        case RGB_MODE_REVERSE:
-            if (record->event.pressed) {
-                uint8_t shifted = get_mods() & (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT));
-                if (shifted) {
-                    rgblight_step();
-                } else {
-                    rgblight_step_reverse();
-                }
-            }
-            return false;
-        case RGB_HUI:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_increase_hue();
-            }
-            return false;
-        case RGB_HUD:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_decrease_hue();
-            }
-            return false;
-        case RGB_SAI:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_increase_sat();
-            }
-            return false;
-        case RGB_SAD:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_decrease_sat();
-            }
-            return false;
-        case RGB_VAI:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_increase_val();
-            }
-            return false;
-        case RGB_VAD:
-// Split keyboards need to trigger on key-up for edge-case issue
-#    ifndef SPLIT_KEYBOARD
-            if (record->event.pressed) {
-#    else
-            if (!record->event.pressed) {
-#    endif
-                rgblight_decrease_val();
-            }
-            return false;
-        case RGB_SPI:
-            if (record->event.pressed) {
-                rgblight_increase_speed();
-            }
-            return false;
-        case RGB_SPD:
-            if (record->event.pressed) {
-                rgblight_decrease_speed();
-            }
-            return false;
-        case RGB_MODE_PLAIN:
-            if (record->event.pressed) {
-                rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
-            }
-            return false;
-        case RGB_MODE_BREATHE:
-#    ifdef RGBLIGHT_EFFECT_BREATHING
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_BREATHING <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_BREATHING_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_BREATHING);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_RAINBOW:
-#    ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_RAINBOW_MOOD <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_RAINBOW_MOOD_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_RAINBOW_MOOD);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_SWIRL:
-#    ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_RAINBOW_SWIRL <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_RAINBOW_SWIRL_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_RAINBOW_SWIRL);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_SNAKE:
-#    ifdef RGBLIGHT_EFFECT_SNAKE
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_SNAKE <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_SNAKE_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_SNAKE);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_KNIGHT:
-#    ifdef RGBLIGHT_EFFECT_KNIGHT
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_KNIGHT <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_KNIGHT_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_KNIGHT);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_XMAS:
-#    ifdef RGBLIGHT_EFFECT_CHRISTMAS
-            if (record->event.pressed) {
-                rgblight_mode(RGBLIGHT_MODE_CHRISTMAS);
-            }
-#    endif
-            return false;
-        case RGB_MODE_GRADIENT:
-#    ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
-            if (record->event.pressed) {
-                if ((RGBLIGHT_MODE_STATIC_GRADIENT <= rgblight_get_mode()) && (rgblight_get_mode() < RGBLIGHT_MODE_STATIC_GRADIENT_end)) {
-                    rgblight_step();
-                } else {
-                    rgblight_mode(RGBLIGHT_MODE_STATIC_GRADIENT);
-                }
-            }
-#    endif
-            return false;
-        case RGB_MODE_RGBTEST:
-#    ifdef RGBLIGHT_EFFECT_RGB_TEST
-            if (record->event.pressed) {
-                rgblight_mode(RGBLIGHT_MODE_RGB_TEST);
-            }
-#    endif
-            return false;
-#endif  // defined(RGBLIGHT_ENABLE) || defined(RGB_MATRIX_ENABLE)
 #ifdef VELOCIKEY_ENABLE
-        case VLK_TOG:
-            if (record->event.pressed) {
+            case VLK_TOG:
                 velocikey_toggle();
-            }
-            return false;
+                return false;
 #endif
-#ifdef PROTOCOL_LUFA
-        case OUT_AUTO:
-            if (record->event.pressed) {
+#ifdef BLUETOOTH_ENABLE
+            case OUT_AUTO:
                 set_output(OUTPUT_AUTO);
-            }
-            return false;
-        case OUT_USB:
-            if (record->event.pressed) {
+                return false;
+            case OUT_USB:
                 set_output(OUTPUT_USB);
-            }
-            return false;
-#    ifdef BLUETOOTH_ENABLE
-        case OUT_BT:
-            if (record->event.pressed) {
+                return false;
+            case OUT_BT:
                 set_output(OUTPUT_BLUETOOTH);
-            }
-            return false;
-#    endif
-#endif
-        case MAGIC_SWAP_CONTROL_CAPSLOCK ... MAGIC_TOGGLE_ALT_GUI:
-        case MAGIC_SWAP_LCTL_LGUI ... MAGIC_EE_HANDS_RIGHT:
-            if (record->event.pressed) {
-                // MAGIC actions (BOOTMAGIC without the boot)
-                if (!eeconfig_is_enabled()) {
-                    eeconfig_init();
-                }
-                /* keymap config */
-                keymap_config.raw = eeconfig_read_keymap();
-                switch (keycode) {
-                    case MAGIC_SWAP_CONTROL_CAPSLOCK:
-                        keymap_config.swap_control_capslock = true;
-                        break;
-                    case MAGIC_CAPSLOCK_TO_CONTROL:
-                        keymap_config.capslock_to_control = true;
-                        break;
-                    case MAGIC_SWAP_LALT_LGUI:
-                        keymap_config.swap_lalt_lgui = true;
-                        break;
-                    case MAGIC_SWAP_RALT_RGUI:
-                        keymap_config.swap_ralt_rgui = true;
-                        break;
-                    case MAGIC_SWAP_LCTL_LGUI:
-                        keymap_config.swap_lctl_lgui = true;
-                        break;
-                    case MAGIC_SWAP_RCTL_RGUI:
-                        keymap_config.swap_rctl_rgui = true;
-                        break;
-                    case MAGIC_NO_GUI:
-                        keymap_config.no_gui = true;
-                        break;
-                    case MAGIC_SWAP_GRAVE_ESC:
-                        keymap_config.swap_grave_esc = true;
-                        break;
-                    case MAGIC_SWAP_BACKSLASH_BACKSPACE:
-                        keymap_config.swap_backslash_backspace = true;
-                        break;
-                    case MAGIC_HOST_NKRO:
-                        clear_keyboard();  // clear first buffer to prevent stuck keys
-                        keymap_config.nkro = true;
-                        break;
-                    case MAGIC_SWAP_ALT_GUI:
-                        keymap_config.swap_lalt_lgui = keymap_config.swap_ralt_rgui = true;
-#ifdef AUDIO_ENABLE
-                        PLAY_SONG(ag_swap_song);
-#endif
-                        break;
-                    case MAGIC_SWAP_CTL_GUI:
-                        keymap_config.swap_lctl_lgui = keymap_config.swap_rctl_rgui = true;
-#ifdef AUDIO_ENABLE
-                        PLAY_SONG(cg_swap_song);
-#endif
-                        break;
-                    case MAGIC_UNSWAP_CONTROL_CAPSLOCK:
-                        keymap_config.swap_control_capslock = false;
-                        break;
-                    case MAGIC_UNCAPSLOCK_TO_CONTROL:
-                        keymap_config.capslock_to_control = false;
-                        break;
-                    case MAGIC_UNSWAP_LALT_LGUI:
-                        keymap_config.swap_lalt_lgui = false;
-                        break;
-                    case MAGIC_UNSWAP_RALT_RGUI:
-                        keymap_config.swap_ralt_rgui = false;
-                        break;
-                    case MAGIC_UNSWAP_LCTL_LGUI:
-                        keymap_config.swap_lctl_lgui = false;
-                        break;
-                    case MAGIC_UNSWAP_RCTL_RGUI:
-                        keymap_config.swap_rctl_rgui = false;
-                        break;
-                    case MAGIC_UNNO_GUI:
-                        keymap_config.no_gui = false;
-                        break;
-                    case MAGIC_UNSWAP_GRAVE_ESC:
-                        keymap_config.swap_grave_esc = false;
-                        break;
-                    case MAGIC_UNSWAP_BACKSLASH_BACKSPACE:
-                        keymap_config.swap_backslash_backspace = false;
-                        break;
-                    case MAGIC_UNHOST_NKRO:
-                        clear_keyboard();  // clear first buffer to prevent stuck keys
-                        keymap_config.nkro = false;
-                        break;
-                    case MAGIC_UNSWAP_ALT_GUI:
-                        keymap_config.swap_lalt_lgui = keymap_config.swap_ralt_rgui = false;
-#ifdef AUDIO_ENABLE
-                        PLAY_SONG(ag_norm_song);
-#endif
-                        break;
-                    case MAGIC_UNSWAP_CTL_GUI:
-                        keymap_config.swap_lctl_lgui = keymap_config.swap_rctl_rgui = false;
-#ifdef AUDIO_ENABLE
-                        PLAY_SONG(cg_norm_song);
+                return false;
 #endif
-                        break;
-                    case MAGIC_TOGGLE_ALT_GUI:
-                        keymap_config.swap_lalt_lgui = !keymap_config.swap_lalt_lgui;
-                        keymap_config.swap_ralt_rgui = keymap_config.swap_lalt_lgui;
-#ifdef AUDIO_ENABLE
-                        if (keymap_config.swap_ralt_rgui) {
-                            PLAY_SONG(ag_swap_song);
-                        } else {
-                            PLAY_SONG(ag_norm_song);
-                        }
-#endif
-                        break;
-                    case MAGIC_TOGGLE_CTL_GUI:
-                        keymap_config.swap_lctl_lgui = !keymap_config.swap_lctl_lgui;
-                        keymap_config.swap_rctl_rgui = keymap_config.swap_lctl_lgui;
-#ifdef AUDIO_ENABLE
-                        if (keymap_config.swap_rctl_rgui) {
-                            PLAY_SONG(cg_swap_song);
-                        } else {
-                            PLAY_SONG(cg_norm_song);
-                        }
-#endif
-                        break;
-                    case MAGIC_TOGGLE_NKRO:
-                        clear_keyboard();  // clear first buffer to prevent stuck keys
-                        keymap_config.nkro = !keymap_config.nkro;
-                        break;
-                    case MAGIC_EE_HANDS_LEFT:
-                        eeconfig_update_handedness(true);
-                        break;
-                    case MAGIC_EE_HANDS_RIGHT:
-                        eeconfig_update_handedness(false);
-                        break;
-                    default:
-                        break;
-                }
-                eeconfig_update_keymap(keymap_config.raw);
-                clear_keyboard();  // clear to prevent stuck keys
-
+#if defined(BACKLIGHT_ENABLE) && defined(BACKLIGHT_BREATHING)
+            case BL_BRTG:
+                backlight_toggle_breathing();
                 return false;
-            }
-            break;
+#endif
+        }
+    }
 
+    // keycodes that depend on both pressed and non-pressed state
+    switch (keycode) {
         case GRAVE_ESC: {
+            /* true if the last press of GRAVE_ESC was shifted (i.e. GUI or SHIFT were pressed), false otherwise.
+            * Used to ensure that the correct keycode is released if the key is released.
+            */
+            static bool grave_esc_was_shifted = false;
+
             uint8_t shifted = get_mods() & ((MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT) | MOD_BIT(KC_LGUI) | MOD_BIT(KC_RGUI)));
 
 #ifdef GRAVE_ESC_ALT_OVERRIDE
@@ -710,15 +366,6 @@ bool process_record_quantum(keyrecord_t *record) {
             send_keyboard_report();
             return false;
         }
-
-#if defined(BACKLIGHT_ENABLE) && defined(BACKLIGHT_BREATHING)
-        case BL_BRTG: {
-            if (record->event.pressed) {
-                backlight_toggle_breathing();
-            }
-            return false;
-        }
-#endif
     }
 
     return process_action_kb(record);
@@ -829,6 +476,13 @@ void send_string_with_delay_P(const char *str, uint8_t interval) {
 }
 
 void send_char(char ascii_code) {
+#if defined(AUDIO_ENABLE) && defined(SENDSTRING_BELL)
+    if (ascii_code == '\a') { // BEL
+        PLAY_SONG(bell_song);
+        return;
+    }
+#endif
+
     uint8_t keycode    = pgm_read_byte(&ascii_to_keycode_lut[(uint8_t)ascii_code]);
     bool    is_shifted = pgm_read_byte(&ascii_to_shift_lut[(uint8_t)ascii_code]);
     bool    is_altgred = pgm_read_byte(&ascii_to_altgr_lut[(uint8_t)ascii_code]);
@@ -909,9 +563,7 @@ __attribute__((weak)) void bootmagic_lite(void) {
 
     // We need multiple scans because debouncing can't be turned off.
     matrix_scan();
-#if defined(DEBOUNCING_DELAY) && DEBOUNCING_DELAY > 0
-    wait_ms(DEBOUNCING_DELAY * 2);
-#elif defined(DEBOUNCE) && DEBOUNCE > 0
+#if defined(DEBOUNCE) && DEBOUNCE > 0
     wait_ms(DEBOUNCE * 2);
 #else
     wait_ms(30);
@@ -982,12 +634,8 @@ void matrix_scan_quantum() {
     matrix_scan_combo();
 #endif
 
-#if defined(BACKLIGHT_ENABLE)
-#    if defined(LED_MATRIX_ENABLE)
+#ifdef LED_MATRIX_ENABLE
     led_matrix_task();
-#    elif defined(BACKLIGHT_PIN) || defined(BACKLIGHT_PINS)
-    backlight_task();
-#    endif
 #endif
 
 #ifdef RGB_MATRIX_ENABLE
diff --git a/quantum/quantum.h b/quantum/quantum.h
index 6beab65a3..09550fec3 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -22,6 +22,7 @@
 #endif
 #if defined(PROTOCOL_CHIBIOS)
 #    include "hal.h"
+#    include "chibios_config.h"
 #endif
 
 #include "wait.h"
@@ -133,6 +134,14 @@ extern layer_state_t layer_state;
 #    include "process_space_cadet.h"
 #endif
 
+#ifdef MAGIC_KEYCODE_ENABLE
+#    include "process_magic.h"
+#endif
+
+#if defined(RGBLIGHT_ENABLE) || defined(RGB_MATRIX_ENABLE)
+#    include "process_rgb.h"
+#endif
+
 #ifdef HD44780_ENABLE
 #    include "hd44780.h"
 #endif
@@ -153,6 +162,14 @@ extern layer_state_t layer_state;
 #    include "process_dynamic_macro.h"
 #endif
 
+#ifdef DYNAMIC_KEYMAP_ENABLE
+#   include "dynamic_keymap.h"
+#endif
+
+#ifdef VIA_ENABLE
+#   include "via.h"
+#endif
+
 // Function substitutions to ease GPIO manipulation
 #if defined(__AVR__)
 typedef uint8_t pin_t;
@@ -182,30 +199,8 @@ typedef ioline_t pin_t;
 #    define readPin(pin) palReadLine(pin)
 #endif
 
-// Send string macros
-#define STRINGIZE(z) #z
-#define ADD_SLASH_X(y) STRINGIZE(\x##y)
-#define SYMBOL_STR(x) ADD_SLASH_X(x)
-
-#define SS_TAP_CODE 1
-#define SS_DOWN_CODE 2
-#define SS_UP_CODE 3
-
-#define SS_TAP(keycode) "\1" SYMBOL_STR(keycode)
-#define SS_DOWN(keycode) "\2" SYMBOL_STR(keycode)
-#define SS_UP(keycode) "\3" SYMBOL_STR(keycode)
-
-// `string` arguments must not be parenthesized
-#define SS_LCTRL(string) SS_DOWN(X_LCTRL) string SS_UP(X_LCTRL)
-#define SS_LGUI(string) SS_DOWN(X_LGUI) string SS_UP(X_LGUI)
-#define SS_LCMD(string) SS_LGUI(string)
-#define SS_LWIN(string) SS_LGUI(string)
-#define SS_LALT(string) SS_DOWN(X_LALT) string SS_UP(X_LALT)
-#define SS_LSFT(string) SS_DOWN(X_LSHIFT) string SS_UP(X_LSHIFT)
-#define SS_RALT(string) SS_DOWN(X_RALT) string SS_UP(X_RALT)
-#define SS_ALGR(string) SS_RALT(string)
-
 #define SEND_STRING(string) send_string_P(PSTR(string))
+#define SEND_STRING_DELAY(string, interval) send_string_with_delay_P(PSTR(string), interval)
 
 extern const bool    ascii_to_shift_lut[128];
 extern const bool    ascii_to_altgr_lut[128];
@@ -256,30 +251,6 @@ void register_code16(uint16_t code);
 void unregister_code16(uint16_t code);
 void tap_code16(uint16_t code);
 
-#ifdef BACKLIGHT_ENABLE
-void backlight_init_ports(void);
-void backlight_task(void);
-void backlight_task_internal(void);
-void backlight_on(pin_t backlight_pin);
-void backlight_off(pin_t backlight_pin);
-
-#    ifdef BACKLIGHT_BREATHING
-void breathing_task(void);
-void breathing_enable(void);
-void breathing_pulse(void);
-void breathing_disable(void);
-void breathing_self_disable(void);
-void breathing_toggle(void);
-bool is_breathing(void);
-
-void breathing_intensity_default(void);
-void breathing_period_default(void);
-void breathing_period_set(uint8_t value);
-void breathing_period_inc(void);
-void breathing_period_dec(void);
-#    endif
-#endif
-
 void     send_dword(uint32_t number);
 void     send_word(uint16_t number);
 void     send_byte(uint8_t number);
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 66a3c66e8..c8d0e354b 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -655,13 +655,42 @@ enum quantum_keycodes {
 // L-ayer, T-ap - 256 keycode max, 16 layer max
 #define LT(layer, kc) (QK_LAYER_TAP | (((layer)&0xF) << 8) | ((kc)&0xFF))
 
+#define CL_SWAP MAGIC_SWAP_CONTROL_CAPSLOCK
+#define CL_NORM MAGIC_UNSWAP_CONTROL_CAPSLOCK
+#define CL_CTRL MAGIC_CAPSLOCK_TO_CONTROL
+#define CL_CAPS MAGIC_UNCAPSLOCK_TO_CONTROL
+
+#define LCG_SWP MAGIC_SWAP_LCTL_LGUI
+#define LCG_NRM MAGIC_UNSWAP_LCTL_LGUI
+#define RCG_SWP MAGIC_SWAP_RCTL_RGUI
+#define RCG_NRM MAGIC_UNSWAP_RCTL_RGUI
+#define CG_SWAP MAGIC_SWAP_CTL_GUI
+#define CG_NORM MAGIC_UNSWAP_CTL_GUI
+#define CG_TOGG MAGIC_TOGGLE_CTL_GUI
+
+#define LAG_SWP MAGIC_SWAP_LALT_LGUI
+#define LAG_NRM MAGIC_UNSWAP_LALT_LGUI
+#define RAG_SWP MAGIC_SWAP_RALT_RGUI
+#define RAG_NRM MAGIC_UNSWAP_RALT_RGUI
 #define AG_SWAP MAGIC_SWAP_ALT_GUI
 #define AG_NORM MAGIC_UNSWAP_ALT_GUI
 #define AG_TOGG MAGIC_TOGGLE_ALT_GUI
 
-#define CG_SWAP MAGIC_SWAP_CTL_GUI
-#define CG_NORM MAGIC_UNSWAP_CTL_GUI
-#define CG_TOGG MAGIC_TOGGLE_CTL_GUI
+#define GUI_OFF MAGIC_NO_GUI
+#define GUI_ON  MAGIC_UNNO_GUI
+
+#define GE_SWAP MAGIC_SWAP_GRAVE_ESC
+#define GE_NORM MAGIC_UNSWAP_GRAVE_ESC
+
+#define BS_SWAP MAGIC_SWAP_BACKSLASH_BACKSPACE
+#define BS_NORM MAGIC_UNSWAP_BACKSLASH_BACKSPACE
+
+#define NK_ON   MAGIC_HOST_NKRO
+#define NK_OFF  MAGIC_UNHOST_NKRO
+#define NK_TOGG MAGIC_TOGGLE_NKRO
+
+#define EH_LEFT MAGIC_EE_HANDS_LEFT
+#define EH_RGHT MAGIC_EE_HANDS_RIGHT
 
 // GOTO layer - 16 layers max
 // when:
diff --git a/quantum/rgb_matrix.c b/quantum/rgb_matrix.c
index 55a6f74be..25ca44054 100644
--- a/quantum/rgb_matrix.c
+++ b/quantum/rgb_matrix.c
@@ -95,6 +95,23 @@ const point_t k_rgb_matrix_center = RGB_MATRIX_CENTER;
 #    endif
 #endif
 
+#if !defined(RGB_MATRIX_STARTUP_HUE)
+#    define RGB_MATRIX_STARTUP_HUE 0
+#endif
+
+#if !defined(RGB_MATRIX_STARTUP_SAT)
+#    define RGB_MATRIX_STARTUP_SAT UINT8_MAX
+#endif
+
+#if !defined(RGB_MATRIX_STARTUP_VAL)
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#endif
+
+#if !defined(RGB_MATRIX_STARTUP_SPD)
+#    define RGB_MATRIX_STARTUP_SPD UINT8_MAX / 2
+#endif
+
+
 bool g_suspend_state = false;
 
 rgb_config_t rgb_matrix_config;
@@ -119,8 +136,8 @@ void eeconfig_update_rgb_matrix_default(void) {
     dprintf("eeconfig_update_rgb_matrix_default\n");
     rgb_matrix_config.enable = 1;
     rgb_matrix_config.mode   = RGB_MATRIX_STARTUP_MODE;
-    rgb_matrix_config.hsv    = (HSV){0, UINT8_MAX, RGB_MATRIX_MAXIMUM_BRIGHTNESS};
-    rgb_matrix_config.speed  = UINT8_MAX / 2;
+    rgb_matrix_config.hsv    = (HSV){RGB_MATRIX_STARTUP_HUE, RGB_MATRIX_STARTUP_SAT, RGB_MATRIX_STARTUP_VAL};
+    rgb_matrix_config.speed  = RGB_MATRIX_STARTUP_SPD;
     eeconfig_update_rgb_matrix();
 }
 
@@ -417,7 +434,12 @@ void rgb_matrix_init(void) {
     eeconfig_debug_rgb_matrix();  // display current eeprom values
 }
 
-void rgb_matrix_set_suspend_state(bool state) { g_suspend_state = state; }
+void rgb_matrix_set_suspend_state(bool state) { 
+    if (RGB_DISABLE_WHEN_USB_SUSPENDED && state) { 
+        rgb_matrix_set_color_all(0, 0, 0); // turn off all LEDs when suspending
+    }
+    g_suspend_state = state; 
+}
 
 void rgb_matrix_toggle(void) {
     rgb_matrix_config.enable ^= 1;
diff --git a/quantum/rgb_matrix.h b/quantum/rgb_matrix.h
index 16ec96f03..96494836e 100644
--- a/quantum/rgb_matrix.h
+++ b/quantum/rgb_matrix.h
@@ -128,26 +128,26 @@ void        rgb_matrix_sethsv(uint16_t hue, uint8_t sat, uint8_t val);
 void        rgb_matrix_sethsv_noeeprom(uint16_t hue, uint8_t sat, uint8_t val);
 
 #ifndef RGBLIGHT_ENABLE
-#    define rgblight_toggle() rgb_matrix_toggle()
-#    define rgblight_enable() rgb_matrix_enable()
-#    define rgblight_enable_noeeprom() rgb_matrix_enable_noeeprom()
-#    define rgblight_disable() rgb_matrix_disable()
-#    define rgblight_disable_noeeprom() rgb_matrix_disable_noeeprom()
-#    define rgblight_step() rgb_matrix_step()
-#    define rgblight_sethsv(hue, sat, val) rgb_matrix_sethsv(hue, sat, val)
-#    define rgblight_sethsv_noeeprom(hue, sat, val) rgb_matrix_sethsv_noeeprom(hue, sat, val)
-#    define rgblight_step_reverse() rgb_matrix_step_reverse()
-#    define rgblight_increase_hue() rgb_matrix_increase_hue()
-#    define rgblight_decrease_hue() rgb_matrix_decrease_hue()
-#    define rgblight_increase_sat() rgb_matrix_increase_sat()
-#    define rgblight_decrease_sat() rgb_matrix_decrease_sat()
-#    define rgblight_increase_val() rgb_matrix_increase_val()
-#    define rgblight_decrease_val() rgb_matrix_decrease_val()
-#    define rgblight_increase_speed() rgb_matrix_increase_speed()
-#    define rgblight_decrease_speed() rgb_matrix_decrease_speed()
-#    define rgblight_mode(mode) rgb_matrix_mode(mode)
-#    define rgblight_mode_noeeprom(mode) rgb_matrix_mode_noeeprom(mode)
-#    define rgblight_get_mode() rgb_matrix_get_mode()
+#    define rgblight_toggle rgb_matrix_toggle
+#    define rgblight_enable rgb_matrix_enable
+#    define rgblight_enable_noeeprom rgb_matrix_enable_noeeprom
+#    define rgblight_disable rgb_matrix_disable
+#    define rgblight_disable_noeeprom rgb_matrix_disable_noeeprom
+#    define rgblight_step rgb_matrix_step
+#    define rgblight_sethsv rgb_matrix_sethsv
+#    define rgblight_sethsv_noeeprom rgb_matrix_sethsv_noeeprom
+#    define rgblight_step_reverse rgb_matrix_step_reverse
+#    define rgblight_increase_hue rgb_matrix_increase_hue
+#    define rgblight_decrease_hue rgb_matrix_decrease_hue
+#    define rgblight_increase_sat rgb_matrix_increase_sat
+#    define rgblight_decrease_sat rgb_matrix_decrease_sat
+#    define rgblight_increase_val rgb_matrix_increase_val
+#    define rgblight_decrease_val rgb_matrix_decrease_val
+#    define rgblight_increase_speed rgb_matrix_increase_speed
+#    define rgblight_decrease_speed rgb_matrix_decrease_speed
+#    define rgblight_mode rgb_matrix_mode
+#    define rgblight_mode_noeeprom rgb_matrix_mode_noeeprom
+#    define rgblight_get_mode rgb_matrix_get_mode
 #endif
 
 typedef struct {
diff --git a/quantum/rgb_matrix_animations/gradient_left_right_anim.h b/quantum/rgb_matrix_animations/gradient_left_right_anim.h
new file mode 100644
index 000000000..2eab2eb75
--- /dev/null
+++ b/quantum/rgb_matrix_animations/gradient_left_right_anim.h
@@ -0,0 +1,22 @@
+#ifndef DISABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
+RGB_MATRIX_EFFECT(GRADIENT_LEFT_RIGHT)
+#    ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+
+bool GRADIENT_LEFT_RIGHT(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    HSV     hsv   = rgb_matrix_config.hsv;
+    uint8_t scale = scale8(64, rgb_matrix_config.speed);
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+        // The x range will be 0..224, map this to 0..7
+        // Relies on hue being 8-bit and wrapping
+        hsv.h   = rgb_matrix_config.hsv.h + (scale * g_led_config.point[i].x >> 5);
+        RGB rgb = hsv_to_rgb(hsv);
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+    return led_max < DRIVER_LED_TOTAL;
+}
+
+#    endif  // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+#endif      // DISABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
diff --git a/quantum/rgb_matrix_animations/rgb_matrix_effects.inc b/quantum/rgb_matrix_animations/rgb_matrix_effects.inc
index 01332ed0d..4c1723d93 100644
--- a/quantum/rgb_matrix_animations/rgb_matrix_effects.inc
+++ b/quantum/rgb_matrix_animations/rgb_matrix_effects.inc
@@ -2,6 +2,7 @@
 #include "rgb_matrix_animations/solid_color_anim.h"
 #include "rgb_matrix_animations/alpha_mods_anim.h"
 #include "rgb_matrix_animations/gradient_up_down_anim.h"
+#include "rgb_matrix_animations/gradient_left_right_anim.h"
 #include "rgb_matrix_animations/breathing_anim.h"
 #include "rgb_matrix_animations/colorband_sat_anim.h"
 #include "rgb_matrix_animations/colorband_val_anim.h"
diff --git a/quantum/rgb_matrix_drivers.c b/quantum/rgb_matrix_drivers.c
index 9729a3064..ea41b0d39 100644
--- a/quantum/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix_drivers.c
@@ -113,7 +113,7 @@ static inline void setled(int i, uint8_t r, uint8_t g, uint8_t b) {
     led[i].g = g;
     led[i].b = b;
 #    ifdef RGBW
-    led[i].w = 0;
+    convert_rgb_to_rgbw(led[i]);
 #    endif
 }
 
diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 7949bb688..141dc2e7b 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -611,6 +611,7 @@ void rgblight_set(void) {
 #    endif
         }
     }
+
 #    ifdef RGBLIGHT_LED_MAP
     LED_TYPE led0[RGBLED_NUM];
     for (uint8_t i = 0; i < RGBLED_NUM; i++) {
@@ -620,7 +621,13 @@ void rgblight_set(void) {
 #    else
     start_led = led + clipping_start_pos;
 #    endif
-    ws2812_setleds(start_led, num_leds);
+
+#ifdef RGBW
+    for (uint8_t i = 0; i < num_leds; i++) {
+        convert_rgb_to_rgbw(&start_led[i]);
+    }
+#endif
+   ws2812_setleds(start_led, num_leds);
 }
 #endif
 
diff --git a/quantum/send_string_keycodes.h b/quantum/send_string_keycodes.h
index e71790a1d..fc6467a74 100644
--- a/quantum/send_string_keycodes.h
+++ b/quantum/send_string_keycodes.h
@@ -1,207 +1,374 @@
-#ifndef SEND_STRING_KEYCODES
-#define SEND_STRING_KEYCODES
-
-#define X_NO 00
-#define X_ROLL_OVER 01
-#define X_POST_FAIL 02
-#define X_UNDEFINED 03
-#define X_A 04
-#define X_B 05
-#define X_C 06
-#define X_D 07
-#define X_E 08
-#define X_F 09
-#define X_G 0a
-#define X_H 0b
-#define X_I 0c
-#define X_J 0d
-#define X_K 0e
-#define X_L 0f
-#define X_M 10
-#define X_N 11
-#define X_O 12
-#define X_P 13
-#define X_Q 14
-#define X_R 15
-#define X_S 16
-#define X_T 17
-#define X_U 18
-#define X_V 19
-#define X_W 1a
-#define X_X 1b
-#define X_Y 1c
-#define X_Z 1d
-#define X_1 1e
-#define X_2 1f
-#define X_3 20
-#define X_4 21
-#define X_5 22
-#define X_6 23
-#define X_7 24
-#define X_8 25
-#define X_9 26
-#define X_0 27
-#define X_ENTER 28
-#define X_ESCAPE 29
-#define X_BSPACE 2a
-#define X_TAB 2b
-#define X_SPACE 2c
-#define X_MINUS 2d
-#define X_EQUAL 2e
-#define X_LBRACKET 2f
-#define X_RBRACKET 30
-#define X_BSLASH 31
-#define X_NONUS_HASH 32
-#define X_SCOLON 33
-#define X_QUOTE 34
-#define X_GRAVE 35
-#define X_COMMA 36
-#define X_DOT 37
-#define X_SLASH 38
-#define X_CAPSLOCK 39
-#define X_F1 3a
-#define X_F2 3b
-#define X_F3 3c
-#define X_F4 3d
-#define X_F5 3e
-#define X_F6 3f
-#define X_F7 40
-#define X_F8 41
-#define X_F9 42
-#define X_F10 43
-#define X_F11 44
-#define X_F12 45
-#define X_PSCREEN 46
-#define X_SCROLLLOCK 47
-#define X_PAUSE 48
-#define X_INSERT 49
-#define X_HOME 4a
-#define X_PGUP 4b
-#define X_DELETE 4c
-#define X_END 4d
-#define X_PGDOWN 4e
-#define X_RIGHT 4f
-#define X_LEFT 50
-#define X_DOWN 51
-#define X_UP 52
-#define X_NUMLOCK 53
-#define X_KP_SLASH 54
-#define X_KP_ASTERISK 55
-#define X_KP_MINUS 56
-#define X_KP_PLUS 57
-#define X_KP_ENTER 58
-#define X_KP_1 59
-#define X_KP_2 5a
-#define X_KP_3 5b
-#define X_KP_4 5c
-#define X_KP_5 5d
-#define X_KP_6 5e
-#define X_KP_7 5f
-#define X_KP_8 60
-#define X_KP_9 61
-#define X_KP_0 62
-#define X_KP_DOT 63
-#define X_NONUS_BSLASH 64
-#define X_APPLICATION 65
-#define X_POWER 66
-#define X_KP_EQUAL 67
-#define X_F13 68
-#define X_F14 69
-#define X_F15 6a
-#define X_F16 6b
-#define X_F17 6c
-#define X_F18 6d
-#define X_F19 6e
-#define X_F20 6f
-#define X_F21 70
-#define X_F22 71
-#define X_F23 72
-#define X_F24 73
-#define X_EXECUTE 74
-#define X_HELP 75
-#define X_MENU 76
-#define X_SELECT 77
-#define X_STOP 78
-#define X_AGAIN 79
-#define X_UNDO 7a
-#define X_CUT 7b
-#define X_COPY 7c
-#define X_PASTE 7d
-#define X_FIND 7e
-#define X__MUTE 7f
-#define X__VOLUP 80
-#define X__VOLDOWN 81
-#define X_LOCKING_CAPS 82
-#define X_LOCKING_NUM 83
-#define X_LOCKING_SCROLL 84
-#define X_KP_COMMA 85
-#define X_KP_EQUAL_AS400 86
-#define X_INT1 87
-#define X_INT2 88
-#define X_INT3 89
-#define X_INT4 8a
-#define X_INT5 8b
-#define X_INT6 8c
-#define X_INT7 8d
-#define X_INT8 8e
-#define X_INT9 8f
-#define X_LANG1 90
-#define X_LANG2 91
-#define X_LANG3 92
-#define X_LANG4 93
-#define X_LANG5 94
-#define X_LANG6 95
-#define X_LANG7 96
-#define X_LANG8 97
-#define X_LANG9 98
-#define X_ALT_ERASE 99
-#define X_SYSREQ 9a
-#define X_CANCEL 9b
-#define X_CLEAR 9c
-#define X_PRIOR 9d
-#define X_RETURN 9e
-#define X_SEPARATOR 9f
-#define X_OUT a0
-#define X_OPER a1
-#define X_CLEAR_AGAIN a2
-#define X_CRSEL a3
-#define X_EXSEL a4
+/* Copyright 2019
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// clang-format off
+
+/* Punctuation */
+#define X_ENT  X_ENTER
+#define X_ESC  X_ESCAPE
+#define X_BSPC X_BSPACE
+#define X_SPC  X_SPACE
+#define X_MINS X_MINUS
+#define X_EQL  X_EQUAL
+#define X_LBRC X_LBRACKET
+#define X_RBRC X_RBRACKET
+#define X_BSLS X_BSLASH
+#define X_NUHS X_NONUS_HASH
+#define X_SCLN X_SCOLON
+#define X_QUOT X_QUOTE
+#define X_GRV  X_GRAVE
+#define X_COMM X_COMMA
+#define X_SLSH X_SLASH
+#define X_NUBS X_NONUS_BSLASH
+
+/* Lock Keys */
+#define X_CLCK X_CAPSLOCK
+#define X_CAPS X_CAPSLOCK
+#define X_SLCK X_SCROLLLOCK
+#define X_NLCK X_NUMLOCK
+#define X_LCAP X_LOCKING_CAPS
+#define X_LNUM X_LOCKING_NUM
+#define X_LSCR X_LOCKING_SCROLL
+
+/* Commands */
+#define X_PSCR X_PSCREEN
+#define X_PAUS X_PAUSE
+#define X_BRK  X_PAUSE
+#define X_INS  X_INSERT
+#define X_DEL  X_DELETE
+#define X_PGDN X_PGDOWN
+#define X_RGHT X_RIGHT
+#define X_APP  X_APPLICATION
+#define X_EXEC X_EXECUTE
+#define X_SLCT X_SELECT
+#define X_AGIN X_AGAIN
+#define X_PSTE X_PASTE
+#define X_ERAS X_ALT_ERASE
+#define X_CLR  X_CLEAR
+
+/* Keypad */
+#define X_PSLS X_KP_SLASH
+#define X_PAST X_KP_ASTERISK
+#define X_PMNS X_KP_MINUS
+#define X_PPLS X_KP_PLUS
+#define X_PENT X_KP_ENTER
+#define X_P1   X_KP_1
+#define X_P2   X_KP_2
+#define X_P3   X_KP_3
+#define X_P4   X_KP_4
+#define X_P5   X_KP_5
+#define X_P6   X_KP_6
+#define X_P7   X_KP_7
+#define X_P8   X_KP_8
+#define X_P9   X_KP_9
+#define X_P0   X_KP_0
+#define X_PDOT X_KP_DOT
+#define X_PEQL X_KP_EQUAL
+#define X_PCMM X_KP_COMMA
+
+/* Japanese specific */
+#define X_ZKHK X_GRAVE
+#define X_RO   X_INT1
+#define X_KANA X_INT2
+#define X_JYEN X_INT3
+#define X_HENK X_INT4
+#define X_MHEN X_INT5
+
+/* Korean specific */
+#define X_HAEN X_LANG1
+#define X_HANJ X_LANG2
+
+/* Modifiers */
+#define X_LCTL X_LCTRL
+#define X_LSFT X_LSHIFT
+#define X_LCMD X_LGUI
+#define X_LWIN X_LGUI
+#define X_RCTL X_RCTRL
+#define X_RSFT X_RSHIFT
+#define X_ALGR X_RALT
+#define X_RCMD X_RGUI
+#define X_RWIN X_RGUI
+
+/* Generic Desktop Page (0x01) */
+#define X_PWR  X_SYSTEM_POWER
+#define X_SLEP X_SYSTEM_SLEEP
+#define X_WAKE X_SYSTEM_WAKE
+
+/* Consumer Page (0x0C) */
+#define X_MUTE X_AUDIO_MUTE
+#define X_VOLU X_AUDIO_VOL_UP
+#define X_VOLD X_AUDIO_VOL_DOWN
+#define X_MNXT X_MEDIA_NEXT_TRACK
+#define X_MPRV X_MEDIA_PREV_TRACK
+#define X_MSTP X_MEDIA_STOP
+#define X_MPLY X_MEDIA_PLAY_PAUSE
+#define X_MSEL X_MEDIA_SELECT
+#define X_EJCT X_MEDIA_EJECT
+#define X_CALC X_CALCULATOR
+#define X_MYCM X_MY_COMPUTER
+#define X_WSCH X_WWW_SEARCH
+#define X_WHOM X_WWW_HOME
+#define X_WBAK X_WWW_BACK
+#define X_WFWD X_WWW_FORWARD
+#define X_WSTP X_WWW_STOP
+#define X_WREF X_WWW_REFRESH
+#define X_WFAV X_WWW_FAVORITES
+#define X_MFFD X_MEDIA_FAST_FORWARD
+#define X_MRWD X_MEDIA_REWIND
+#define X_BRIU X_BRIGHTNESS_UP
+#define X_BRID X_BRIGHTNESS_DOWN
+
+/* System Specific */
+#define X_BRMU X_PAUSE
+#define X_BRMD X_SCROLLLOCK
+
+/* Keyboard/Keypad Page (0x07) */
+#define X_A                  04
+#define X_B                  05
+#define X_C                  06
+#define X_D                  07
+#define X_E                  08
+#define X_F                  09
+#define X_G                  0a
+#define X_H                  0b
+#define X_I                  0c
+#define X_J                  0d
+#define X_K                  0e
+#define X_L                  0f
+#define X_M                  10
+#define X_N                  11
+#define X_O                  12
+#define X_P                  13
+#define X_Q                  14
+#define X_R                  15
+#define X_S                  16
+#define X_T                  17
+#define X_U                  18
+#define X_V                  19
+#define X_W                  1a
+#define X_X                  1b
+#define X_Y                  1c
+#define X_Z                  1d
+#define X_1                  1e
+#define X_2                  1f
+#define X_3                  20
+#define X_4                  21
+#define X_5                  22
+#define X_6                  23
+#define X_7                  24
+#define X_8                  25
+#define X_9                  26
+#define X_0                  27
+#define X_ENTER              28
+#define X_ESCAPE             29
+#define X_BSPACE             2a
+#define X_TAB                2b
+#define X_SPACE              2c
+#define X_MINUS              2d
+#define X_EQUAL              2e
+#define X_LBRACKET           2f
+#define X_RBRACKET           30
+#define X_BSLASH             31
+#define X_NONUS_HASH         32
+#define X_SCOLON             33
+#define X_QUOTE              34
+#define X_GRAVE              35
+#define X_COMMA              36
+#define X_DOT                37
+#define X_SLASH              38
+#define X_CAPSLOCK           39
+#define X_F1                 3a
+#define X_F2                 3b
+#define X_F3                 3c
+#define X_F4                 3d
+#define X_F5                 3e
+#define X_F6                 3f
+#define X_F7                 40
+#define X_F8                 41
+#define X_F9                 42
+#define X_F10                43
+#define X_F11                44
+#define X_F12                45
+#define X_PSCREEN            46
+#define X_SCROLLLOCK         47
+#define X_PAUSE              48
+#define X_INSERT             49
+#define X_HOME               4a
+#define X_PGUP               4b
+#define X_DELETE             4c
+#define X_END                4d
+#define X_PGDOWN             4e
+#define X_RIGHT              4f
+#define X_LEFT               50
+#define X_DOWN               51
+#define X_UP                 52
+#define X_NUMLOCK            53
+#define X_KP_SLASH           54
+#define X_KP_ASTERISK        55
+#define X_KP_MINUS           56
+#define X_KP_PLUS            57
+#define X_KP_ENTER           58
+#define X_KP_1               59
+#define X_KP_2               5a
+#define X_KP_3               5b
+#define X_KP_4               5c
+#define X_KP_5               5d
+#define X_KP_6               5e
+#define X_KP_7               5f
+#define X_KP_8               60
+#define X_KP_9               61
+#define X_KP_0               62
+#define X_KP_DOT             63
+#define X_NONUS_BSLASH       64
+#define X_APPLICATION        65
+#define X_POWER              66
+#define X_KP_EQUAL           67
+#define X_F13                68
+#define X_F14                69
+#define X_F15                6a
+#define X_F16                6b
+#define X_F17                6c
+#define X_F18                6d
+#define X_F19                6e
+#define X_F20                6f
+#define X_F21                70
+#define X_F22                71
+#define X_F23                72
+#define X_F24                73
+#define X_EXECUTE            74
+#define X_HELP               75
+#define X_MENU               76
+#define X_SELECT             77
+#define X_STOP               78
+#define X_AGAIN              79
+#define X_UNDO               7a
+#define X_CUT                7b
+#define X_COPY               7c
+#define X_PASTE              7d
+#define X_FIND               7e
+#define X__MUTE              7f
+#define X__VOLUP             80
+#define X__VOLDOWN           81
+#define X_LOCKING_CAPS       82
+#define X_LOCKING_NUM        83
+#define X_LOCKING_SCROLL     84
+#define X_KP_COMMA           85
+#define X_KP_EQUAL_AS400     86
+#define X_INT1               87
+#define X_INT2               88
+#define X_INT3               89
+#define X_INT4               8a
+#define X_INT5               8b
+#define X_INT6               8c
+#define X_INT7               8d
+#define X_INT8               8e
+#define X_INT9               8f
+#define X_LANG1              90
+#define X_LANG2              91
+#define X_LANG3              92
+#define X_LANG4              93
+#define X_LANG5              94
+#define X_LANG6              95
+#define X_LANG7              96
+#define X_LANG8              97
+#define X_LANG9              98
+#define X_ALT_ERASE          99
+#define X_SYSREQ             9a
+#define X_CANCEL             9b
+#define X_CLEAR              9c
+#define X_PRIOR              9d
+#define X_RETURN             9e
+#define X_SEPARATOR          9f
+#define X_OUT                a0
+#define X_OPER               a1
+#define X_CLEAR_AGAIN        a2
+#define X_CRSEL              a3
+#define X_EXSEL              a4
 
 /* Modifiers */
-#define X_LCTRL e0
-#define X_LSHIFT e1
-#define X_LALT e2
-#define X_LGUI e3
-#define X_RCTRL e4
-#define X_RSHIFT e5
-#define X_RALT e6
-#define X_RGUI e7
-
-/* System Control */
-#define X_SYSTEM_POWER a5
-#define X_SYSTEM_SLEEP a6
-#define X_SYSTEM_WAKE a7
-
-/* Media Control */
-#define X_AUDIO_MUTE a8
-#define X_AUDIO_VOL_UP a9
-#define X_AUDIO_VOL_DOWN aa
-#define X_MEDIA_NEXT_TRACK ab
-#define X_MEDIA_PREV_TRACK ac
-#define X_MEDIA_STOP ad
-#define X_MEDIA_PLAY_PAUSE ae
-#define X_MEDIA_SELECT af
-#define X_MEDIA_EJECT b0
-#define X_MAIL b1
-#define X_CALCULATOR b2
-#define X_MY_COMPUTER b3
-#define X_WWW_SEARCH b4
-#define X_WWW_HOME b5
-#define X_WWW_BACK b6
-#define X_WWW_FORWARD b7
-#define X_WWW_STOP b8
-#define X_WWW_REFRESH b9
-#define X_WWW_FAVORITES ba
+#define X_LCTRL              e0
+#define X_LSHIFT             e1
+#define X_LALT               e2
+#define X_LGUI               e3
+#define X_RCTRL              e4
+#define X_RSHIFT             e5
+#define X_RALT               e6
+#define X_RGUI               e7
+
+/* Media and Function keys */
+/* Generic Desktop Page (0x01) */
+#define X_SYSTEM_POWER       a5
+#define X_SYSTEM_SLEEP       a6
+#define X_SYSTEM_WAKE        a7
+
+/* Consumer Page (0x0C) */
+#define X_AUDIO_MUTE         a8
+#define X_AUDIO_VOL_UP       a9
+#define X_AUDIO_VOL_DOWN     aa
+#define X_MEDIA_NEXT_TRACK   ab
+#define X_MEDIA_PREV_TRACK   ac
+#define X_MEDIA_STOP         ad
+#define X_MEDIA_PLAY_PAUSE   ae
+#define X_MEDIA_SELECT       af
+#define X_MEDIA_EJECT        b0
+#define X_MAIL               b1
+#define X_CALCULATOR         b2
+#define X_MY_COMPUTER        b3
+#define X_WWW_SEARCH         b4
+#define X_WWW_HOME           b5
+#define X_WWW_BACK           b6
+#define X_WWW_FORWARD        b7
+#define X_WWW_STOP           b8
+#define X_WWW_REFRESH        b9
+#define X_WWW_FAVORITES      ba
 #define X_MEDIA_FAST_FORWARD bb
-#define X_MEDIA_REWIND bc
-#endif
+#define X_MEDIA_REWIND       bc
+#define X_BRIGHTNESS_UP      bd
+#define X_BRIGHTNESS_DOWN    be
+
+// Send string macros
+#define STRINGIZE(z) #z
+#define ADD_SLASH_X(y) STRINGIZE(\x##y)
+#define SYMBOL_STR(x) ADD_SLASH_X(x)
+
+#define SS_TAP_CODE 1
+#define SS_DOWN_CODE 2
+#define SS_UP_CODE 3
+
+#define SS_TAP(keycode) "\1" SYMBOL_STR(keycode)
+#define SS_DOWN(keycode) "\2" SYMBOL_STR(keycode)
+#define SS_UP(keycode) "\3" SYMBOL_STR(keycode)
+
+// `string` arguments must not be parenthesized
+#define SS_LCTL(string) SS_DOWN(X_LCTL) string SS_UP(X_LCTL)
+#define SS_LSFT(string) SS_DOWN(X_LSFT) string SS_UP(X_LSFT)
+#define SS_LALT(string) SS_DOWN(X_LALT) string SS_UP(X_LALT)
+#define SS_LGUI(string) SS_DOWN(X_LGUI) string SS_UP(X_LGUI)
+#define SS_LCMD(string) SS_LGUI(string)
+#define SS_LWIN(string) SS_LGUI(string)
+
+#define SS_RCTL(string) SS_DOWN(X_RCTL) string SS_UP(X_RCTL)
+#define SS_RSFT(string) SS_DOWN(X_RSFT) string SS_UP(X_RSFT)
+#define SS_RALT(string) SS_DOWN(X_RALT) string SS_UP(X_RALT)
+#define SS_RGUI(string) SS_DOWN(X_RGUI) string SS_UP(X_RGUI)
+#define SS_ALGR(string) SS_RALT(string)
+#define SS_RCMD(string) SS_RGUI(string)
+#define SS_RWIN(string) SS_RGUI(string)
+
+// DEPRECATED
+#define SS_LCTRL(string) SS_LCTL(string)
diff --git a/quantum/split_common/matrix.c b/quantum/split_common/matrix.c
index 7176d0cc4..ed1ff5acf 100644
--- a/quantum/split_common/matrix.c
+++ b/quantum/split_common/matrix.c
@@ -14,10 +14,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-
-/*
- * scan matrix
- */
 #include <stdint.h>
 #include <stdbool.h>
 #include "wait.h"
@@ -33,23 +29,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    include "encoder.h"
 #endif
 
-#if (MATRIX_COLS <= 8)
-#    define print_matrix_header() print("\nr/c 01234567\n")
-#    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop(matrix[i])
-#    define ROW_SHIFTER ((uint8_t)1)
-#elif (MATRIX_COLS <= 16)
-#    define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
-#    define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop16(matrix[i])
-#    define ROW_SHIFTER ((uint16_t)1)
-#elif (MATRIX_COLS <= 32)
-#    define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
-#    define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
-#    define matrix_bitpop(i) bitpop32(matrix[i])
-#    define ROW_SHIFTER ((uint32_t)1)
-#endif
-
 #define ERROR_DISCONNECT_COUNT 5
 
 #define ROWS_PER_HAND (MATRIX_ROWS / 2)
@@ -62,58 +41,15 @@ static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 #endif
 
 /* matrix state(1:on, 0:off) */
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t raw_matrix[ROWS_PER_HAND];
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
 // row offsets for each hand
 uint8_t thisHand, thatHand;
 
 // user-defined overridable functions
-
-__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
-
-__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
-__attribute__((weak)) void matrix_init_user(void) {}
-
-__attribute__((weak)) void matrix_scan_user(void) {}
-
 __attribute__((weak)) void matrix_slave_scan_user(void) {}
 
-// helper functions
-
-inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
-
-inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
-
-bool matrix_is_modified(void) {
-    if (debounce_active()) return false;
-    return true;
-}
-
-inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
-
-inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
-
-void matrix_print(void) {
-    print_matrix_header();
-
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        phex(row);
-        print(": ");
-        print_matrix_row(row);
-        print("\n");
-    }
-}
-
-uint8_t matrix_key_count(void) {
-    uint8_t count = 0;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        count += matrix_bitpop(i);
-    }
-    return count;
-}
-
 // matrix code
 
 #ifdef DIRECT_PINS
@@ -136,7 +72,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
         pin_t pin = direct_pins[current_row][col_index];
         if (pin != NO_PIN) {
-            current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
+            current_matrix[current_row] |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
         }
     }
 
@@ -179,7 +115,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     // For each col...
     for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
         // Populate the matrix row with the state of the col pin
-        current_matrix[current_row] |= readPin(col_pins[col_index]) ? 0 : (ROW_SHIFTER << col_index);
+        current_matrix[current_row] |= readPin(col_pins[col_index]) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
     }
 
     // Unselect row
@@ -225,10 +161,10 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
         // Check row pin state
         if (readPin(row_pins[row_index])) {
             // Pin HI, clear col bit
-            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+            current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
         } else {
             // Pin LO, set col bit
-            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
+            current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
         }
 
         // Determine if the matrix changed state
@@ -280,7 +216,8 @@ void matrix_init(void) {
 
     // initialize matrix state: all keys off
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        matrix[i] = 0;
+        raw_matrix[i] = 0;
+        matrix[i]     = 0;
     }
 
     debounce_init(ROWS_PER_HAND);
@@ -288,29 +225,7 @@ void matrix_init(void) {
     matrix_init_quantum();
 }
 
-uint8_t _matrix_scan(void) {
-    bool changed = false;
-
-#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
-    // Set row, read cols
-    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
-        changed |= read_cols_on_row(raw_matrix, current_row);
-    }
-#elif (DIODE_DIRECTION == ROW2COL)
-    // Set col, read rows
-    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-        changed |= read_rows_on_col(raw_matrix, current_col);
-    }
-#endif
-
-    debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
-
-    return (uint8_t)changed;
-}
-
-uint8_t matrix_scan(void) {
-    uint8_t ret = _matrix_scan();
-
+void matrix_post_scan(void) {
     if (is_keyboard_master()) {
         static uint8_t error_count;
 
@@ -335,6 +250,25 @@ uint8_t matrix_scan(void) {
 #endif
         matrix_slave_scan_user();
     }
+}
+
+uint8_t matrix_scan(void) {
+    bool changed = false;
+
+#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
+        changed |= read_cols_on_row(raw_matrix, current_row);
+    }
+#elif (DIODE_DIRECTION == ROW2COL)
+    // Set col, read rows
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+        changed |= read_rows_on_col(raw_matrix, current_col);
+    }
+#endif
+
+    debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
 
-    return ret;
+    matrix_post_scan();
+    return (uint8_t)changed;
 }
diff --git a/quantum/split_common/matrix.h b/quantum/split_common/matrix.h
deleted file mode 100644
index c2bdd3098..000000000
--- a/quantum/split_common/matrix.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-#include <common/matrix.h>
diff --git a/quantum/split_common/post_config.h b/quantum/split_common/post_config.h
index 5c0b414fb..4ae1d5273 100644
--- a/quantum/split_common/post_config.h
+++ b/quantum/split_common/post_config.h
@@ -1,4 +1,4 @@
-#if defined(USE_I2C) || defined(EH)
+#if defined(USE_I2C)
 // When using I2C, using rgblight implicitly involves split support.
 #    if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_SPLIT)
 #        define RGBLIGHT_SPLIT
diff --git a/quantum/split_common/split_util.c b/quantum/split_common/split_util.c
index 5c548de05..076f18664 100644
--- a/quantum/split_common/split_util.c
+++ b/quantum/split_common/split_util.c
@@ -33,9 +33,11 @@ bool waitForUsb(void) {
         wait_ms(100);
     }
 
-#if defined(__AVR__)
     // Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
+#if defined(__AVR__)
     (USBCON &= ~(_BV(USBE) | _BV(OTGPADE)));
+#else
+    usbStop(&USBD1);
 #endif
 
     return false;
@@ -76,7 +78,7 @@ __attribute__((weak)) bool is_keyboard_master(void) {
 }
 
 static void keyboard_master_setup(void) {
-#if defined(USE_I2C) || defined(EH)
+#if defined(USE_I2C)
 #    ifdef SSD1306OLED
     matrix_master_OLED_init();
 #    endif
diff --git a/quantum/split_common/transport.c b/quantum/split_common/transport.c
index 3c783dc56..ab421adc4 100644
--- a/quantum/split_common/transport.c
+++ b/quantum/split_common/transport.c
@@ -21,7 +21,7 @@ static pin_t encoders_pad[] = ENCODERS_PAD_A;
 #    define NUMBER_OF_ENCODERS (sizeof(encoders_pad) / sizeof(pin_t))
 #endif
 
-#if defined(USE_I2C) || defined(EH)
+#if defined(USE_I2C)
 
 #    include "i2c_master.h"
 #    include "i2c_slave.h"
diff --git a/quantum/stm32/proton_c.mk b/quantum/stm32/proton_c.mk
index ff28a4cb5..b25b55504 100644
--- a/quantum/stm32/proton_c.mk
+++ b/quantum/stm32/proton_c.mk
@@ -5,9 +5,7 @@ AUDIO_ENABLE = yes
 WS2812_DRIVER = bitbang
 
 # Force task driven PWM until ARM can provide automatic configuration
-ifneq ($(strip $(BACKLIGHT_ENABLE)), no)
-        BACKLIGHT_ENABLE = software
-endif
+BACKLIGHT_DRIVER = software
 
 # The rest of these settings shouldn't change
 
diff --git a/quantum/template/base/keymaps/default/keymap.c b/quantum/template/base/keymaps/default/keymap.c
index 3a68f5487..af35ccec1 100644
--- a/quantum/template/base/keymaps/default/keymap.c
+++ b/quantum/template/base/keymaps/default/keymap.c
@@ -52,7 +52,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
         case QMKURL:
             if (record->event.pressed) {
                 // when keycode QMKURL is pressed
-                SEND_STRING("https://qmk.fm/" SS_TAP(X_ENTER));
+                SEND_STRING("https://qmk.fm/\n");
             } else {
                 // when keycode QMKURL is released
             }
diff --git a/quantum/via.c b/quantum/via.c
new file mode 100644
index 000000000..64b05324a
--- /dev/null
+++ b/quantum/via.c
@@ -0,0 +1,400 @@
+/* Copyright 2019 Jason Williams (Wilba)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RAW_ENABLE
+#    error "RAW_ENABLE is not enabled"
+#endif
+
+#ifndef DYNAMIC_KEYMAP_ENABLE
+#    error "DYNAMIC_KEYMAP_ENABLE is not enabled"
+#endif
+
+#include "quantum.h"
+
+#include "via.h"
+#include "raw_hid.h"
+#include "dynamic_keymap.h"
+#include "tmk_core/common/eeprom.h"
+#include "version.h" // for QMK_BUILDDATE used in EEPROM magic
+
+// Can be called in an overriding via_init_kb() to test if keyboard level code usage of
+// EEPROM is invalid and use/save defaults.
+bool via_eeprom_is_valid(void)
+{
+    char *p = QMK_BUILDDATE; // e.g. "2019-11-05-11:29:54"
+    uint8_t magic0 = ( ( p[2] & 0x0F ) << 4 ) | ( p[3]  & 0x0F );
+    uint8_t magic1 = ( ( p[5] & 0x0F ) << 4 ) | ( p[6]  & 0x0F );
+    uint8_t magic2 = ( ( p[8] & 0x0F ) << 4 ) | ( p[9]  & 0x0F );
+
+    return (eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+0 ) == magic0 &&
+            eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+1 ) == magic1 &&
+            eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+2 ) == magic2 );
+}
+
+// Sets VIA/keyboard level usage of EEPROM to valid/invalid
+// Keyboard level code (eg. via_init_kb()) should not call this
+void via_eeprom_set_valid(bool valid)
+{
+    char *p = QMK_BUILDDATE; // e.g. "2019-11-05-11:29:54"
+    uint8_t magic0 = ( ( p[2] & 0x0F ) << 4 ) | ( p[3]  & 0x0F );
+    uint8_t magic1 = ( ( p[5] & 0x0F ) << 4 ) | ( p[6]  & 0x0F );
+    uint8_t magic2 = ( ( p[8] & 0x0F ) << 4 ) | ( p[9]  & 0x0F );
+
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+0, valid ? magic0 : 0xFF);
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+1, valid ? magic1 : 0xFF);
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+2, valid ? magic2 : 0xFF);
+}
+
+// Flag QMK and VIA/keyboard level EEPROM as invalid.
+// Used in bootmagic_lite() and VIA command handler.
+// Keyboard level code should not need to call this.
+void via_eeprom_reset(void)
+{
+    // Set the VIA specific EEPROM state as invalid.
+    via_eeprom_set_valid(false);
+    // Set the TMK/QMK EEPROM state as invalid.
+    eeconfig_disable();
+}
+
+// Override bootmagic_lite() so it can flag EEPROM as invalid
+// as well as jump to bootloader, thus performing a "factory reset"
+// of dynamic keymaps and optionally backlight/other settings.
+void bootmagic_lite(void)
+{
+    // The lite version of TMK's bootmagic based on Wilba.
+    // 100% less potential for accidentally making the
+    // keyboard do stupid things.
+
+    // We need multiple scans because debouncing can't be turned off.
+    matrix_scan();
+#if defined(DEBOUNCE) && DEBOUNCE > 0
+    wait_ms(DEBOUNCE * 2);
+#else
+    wait_ms(30);
+#endif
+    matrix_scan();
+
+    // If the Esc and space bar are held down on power up,
+    // reset the EEPROM valid state and jump to bootloader.
+    // Assumes Esc is at [0,0].
+    // This isn't very generalized, but we need something that doesn't
+    // rely on user's keymaps in firmware or EEPROM.
+    if (matrix_get_row(BOOTMAGIC_LITE_ROW) & (1 << BOOTMAGIC_LITE_COLUMN)) {
+        // This is the only difference from the default implementation.
+        via_eeprom_reset();
+        // Jump to bootloader.
+        bootloader_jump();
+    }
+}
+
+// Override this at the keyboard code level to check
+// VIA's EEPROM valid state and reset to defaults as needed.
+// Used by keyboards that store their own state in EEPROM,
+// for backlight, rotary encoders, etc.
+// The override should not set via_eeprom_set_valid(true) as
+// the caller also needs to check the valid state.
+__attribute__((weak)) void via_init_kb(void) {
+}
+
+// Called by QMK core to initialize dynamic keymaps etc.
+void via_init(void)
+{
+    // Let keyboard level test EEPROM valid state,
+    // but not set it valid, it is done here.
+    via_init_kb();
+
+    // If the EEPROM has the magic, the data is good.
+    // OK to load from EEPROM.
+    if (via_eeprom_is_valid()) {
+    } else      {
+        // This resets the layout options
+        via_set_layout_options(0);
+        // This resets the keymaps in EEPROM to what is in flash.
+        dynamic_keymap_reset();
+        // This resets the macros in EEPROM to nothing.
+        dynamic_keymap_macro_reset();
+        // Save the magic number last, in case saving was interrupted
+        via_eeprom_set_valid(true);
+    }
+}
+
+// This is generalized so the layout options EEPROM usage can be
+// variable, between 1 and 4 bytes.
+uint32_t via_get_layout_options(void)
+{
+    uint32_t value = 0;
+    // Start at the most significant byte
+    void * source = (void *)(VIA_EEPROM_LAYOUT_OPTIONS_ADDR);
+    for ( uint8_t i = 0; i < VIA_EEPROM_LAYOUT_OPTIONS_SIZE; i++ ) {
+        value = value << 8;
+        value |= eeprom_read_byte(source);
+        source++;
+    }
+    return value;
+}
+
+void via_set_layout_options(uint32_t value)
+{
+    // Start at the least significant byte
+    void * target = (void *)(VIA_EEPROM_LAYOUT_OPTIONS_ADDR+VIA_EEPROM_LAYOUT_OPTIONS_SIZE-1);
+    for ( uint8_t i = 0; i < VIA_EEPROM_LAYOUT_OPTIONS_SIZE; i++ ) {
+        eeprom_update_byte(target, value & 0xFF );
+        value = value >> 8;
+        target--;
+    }
+}
+
+// Called by QMK core to process VIA-specific keycodes.
+bool process_record_via(uint16_t keycode, keyrecord_t *record)
+{
+    // Handle macros
+    if (record->event.pressed) {
+        if ( keycode >= MACRO00 && keycode <= MACRO15 )
+        {
+            uint8_t id = keycode - MACRO00;
+            dynamic_keymap_macro_send(id);
+            return false;
+        }
+    }
+
+    // TODO: ideally this would be generalized and refactored into
+    // QMK core as advanced keycodes, until then, the simple case
+    // can be available here to keyboards using VIA
+    switch(keycode) {
+        case FN_MO13:
+            if (record->event.pressed) {
+                layer_on(1);
+                update_tri_layer(1, 2, 3);
+            } else {
+                layer_off(1);
+                update_tri_layer(1, 2, 3);
+            }
+            return false;
+            break;
+        case FN_MO23:
+            if (record->event.pressed) {
+                layer_on(2);
+                update_tri_layer(1, 2, 3);
+            } else {
+                layer_off(2);
+                update_tri_layer(1, 2, 3);
+            }
+            return false;
+            break;
+    }
+    return true;
+}
+
+// Keyboard level code can override this to handle custom messages from VIA.
+// See raw_hid_receive() implementation.
+// DO NOT call raw_hid_send() in the overide function.
+__attribute__((weak)) void raw_hid_receive_kb(uint8_t *data, uint8_t length) {
+    uint8_t *command_id = &(data[0]);
+    *command_id = id_unhandled;
+}
+
+// VIA handles received HID messages first, and will route to
+// raw_hid_receive_kb() for command IDs that are not handled here.
+// This gives the keyboard code level the ability to handle the command
+// specifically.
+//
+// raw_hid_send() is called at the end, with the same buffer, which was 
+// possibly modified with returned values.
+void raw_hid_receive( uint8_t *data, uint8_t length )
+{
+    uint8_t *command_id = &(data[0]);
+    uint8_t *command_data = &(data[1]);
+    switch ( *command_id )
+    {
+        case id_get_protocol_version:
+        {
+            command_data[0] = VIA_PROTOCOL_VERSION >> 8;
+            command_data[1] = VIA_PROTOCOL_VERSION & 0xFF;
+            break;
+        }
+        case id_get_keyboard_value:
+        {
+            switch ( command_data[0] )
+            {
+                case id_uptime:
+                {
+                    uint32_t value = timer_read32();
+                    command_data[1] = (value >> 24 ) & 0xFF;
+                    command_data[2] = (value >> 16 ) & 0xFF;
+                    command_data[3] = (value >> 8 ) & 0xFF;
+                    command_data[4] = value & 0xFF;
+                    break;
+                }
+                case id_layout_options:
+                {
+                    uint32_t value = via_get_layout_options();
+                    command_data[1] = (value >> 24 ) & 0xFF;
+                    command_data[2] = (value >> 16 ) & 0xFF;
+                    command_data[3] = (value >> 8 ) & 0xFF;
+                    command_data[4] = value & 0xFF;
+                    break;
+                }
+                case id_switch_matrix_state:
+                {
+#if ( (MATRIX_COLS/8+1)*MATRIX_ROWS <= 28 )
+                    uint8_t i = 1;
+                    for ( uint8_t row=0; row<MATRIX_ROWS; row++ ) {
+                        matrix_row_t value = matrix_get_row(row);
+#if (MATRIX_COLS > 24)
+                        command_data[i++] = (value >> 24 ) & 0xFF;
+#endif
+#if (MATRIX_COLS > 16)
+                        command_data[i++] = (value >> 16 ) & 0xFF;
+#endif
+#if (MATRIX_COLS > 8)
+                        command_data[i++] = (value >> 8 ) & 0xFF;
+#endif
+                        command_data[i++] = value & 0xFF;
+                    }
+#endif
+                    break;
+                }
+                default:
+                {
+                    raw_hid_receive_kb(data,length);
+                    break;
+                }
+            }
+            break;
+        }
+        case id_set_keyboard_value:
+        {
+            switch ( command_data[0] )
+            {
+                case id_layout_options:
+                {
+                    uint32_t value = ( (uint32_t)command_data[1] << 24 ) |
+                                     ( (uint32_t)command_data[2] << 16 ) |
+                                     ( (uint32_t)command_data[3] << 8 ) |
+                                       (uint32_t)command_data[4];
+                    via_set_layout_options(value);
+                    break;
+                }
+                default:
+                {
+                    raw_hid_receive_kb(data,length);
+                    break;
+                }
+            }
+            break;
+        }
+        case id_dynamic_keymap_get_keycode:
+        {
+            uint16_t keycode = dynamic_keymap_get_keycode( command_data[0], command_data[1], command_data[2] );
+            command_data[3] = keycode >> 8;
+            command_data[4] = keycode & 0xFF;
+            break;
+        }
+        case id_dynamic_keymap_set_keycode:
+        {
+            dynamic_keymap_set_keycode( command_data[0], command_data[1], command_data[2], ( command_data[3] << 8 ) | command_data[4] );
+            break;
+        }
+        case id_dynamic_keymap_reset:
+        {
+            dynamic_keymap_reset();
+            break;
+        }
+        case id_backlight_config_set_value:
+        case id_backlight_config_get_value:
+        case id_backlight_config_save:
+        {
+            raw_hid_receive_kb(data, length);
+            break;
+        }
+        case id_dynamic_keymap_macro_get_count:
+        {
+            command_data[0] = dynamic_keymap_macro_get_count();
+            break;
+        }
+        case id_dynamic_keymap_macro_get_buffer_size:
+        {
+            uint16_t size = dynamic_keymap_macro_get_buffer_size();
+            command_data[0] = size >> 8;
+            command_data[1] = size & 0xFF;
+            break;
+        }
+        case id_dynamic_keymap_macro_get_buffer:
+        {
+            uint16_t offset = ( command_data[0] << 8 ) | command_data[1];
+            uint16_t size = command_data[2]; // size <= 28
+            dynamic_keymap_macro_get_buffer( offset, size, &command_data[3] );
+            break;
+        }
+        case id_dynamic_keymap_macro_set_buffer:
+        {
+            uint16_t offset = ( command_data[0] << 8 ) | command_data[1];
+            uint16_t size = command_data[2]; // size <= 28
+            dynamic_keymap_macro_set_buffer( offset, size, &command_data[3] );
+            break;
+        }
+        case id_dynamic_keymap_macro_reset:
+        {
+            dynamic_keymap_macro_reset();
+            break;
+        }
+        case id_dynamic_keymap_get_layer_count:
+        {
+            command_data[0] = dynamic_keymap_get_layer_count();
+            break;
+        }
+        case id_dynamic_keymap_get_buffer:
+        {
+            uint16_t offset = ( command_data[0] << 8 ) | command_data[1];
+            uint16_t size = command_data[2]; // size <= 28
+            dynamic_keymap_get_buffer( offset, size, &command_data[3] );
+            break;
+        }
+        case id_dynamic_keymap_set_buffer:
+        {
+            uint16_t offset = ( command_data[0] << 8 ) | command_data[1];
+            uint16_t size = command_data[2]; // size <= 28
+            dynamic_keymap_set_buffer( offset, size, &command_data[3] );
+            break;
+        }
+        case id_eeprom_reset:
+        {
+            via_eeprom_reset();
+            break;
+        }
+        case id_bootloader_jump:
+        {
+            // Need to send data back before the jump
+            // Informs host that the command is handled
+            raw_hid_send( data, length );
+            // Give host time to read it
+            wait_ms(100);
+            bootloader_jump();
+            break;
+        }
+        default:
+        {
+            // The command ID is not known
+            // Return the unhandled state
+            *command_id = id_unhandled;
+            break;
+        }
+    }
+
+    // Return the same buffer, optionally with values changed
+    // (i.e. returning state to the host, or the unhandled state).
+    raw_hid_send( data, length );
+}
diff --git a/quantum/via.h b/quantum/via.h
new file mode 100644
index 000000000..f9a8017b2
--- /dev/null
+++ b/quantum/via.h
@@ -0,0 +1,151 @@
+/* Copyright 2019 Jason Williams (Wilba)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <tmk_core/common/eeconfig.h> // for EECONFIG_SIZE
+
+// Keyboard level code can change where VIA stores the magic.
+// The magic is the build date YYMMDD encoded as BCD in 3 bytes,
+// thus installing firmware built on a different date to the one
+// already installed can be detected and the EEPROM data is reset.
+// The only reason this is important is in case EEPROM usage changes
+// and the EEPROM was not explicitly reset by bootmagic lite.
+#ifndef VIA_EEPROM_MAGIC_ADDR
+#   define VIA_EEPROM_MAGIC_ADDR (EECONFIG_SIZE)
+#endif
+
+#define VIA_EEPROM_LAYOUT_OPTIONS_ADDR (VIA_EEPROM_MAGIC_ADDR+3)
+
+// Changing the layout options size after release will invalidate EEPROM,
+// but this is something that should be set correctly on initial implementation.
+// 1 byte is enough for most uses (i.e. 8 binary states, or 6 binary + 1 ternary/quaternary )
+#ifndef VIA_EEPROM_LAYOUT_OPTIONS_SIZE
+#   define VIA_EEPROM_LAYOUT_OPTIONS_SIZE 1
+#endif
+
+// The end of the EEPROM memory used by VIA
+// By default, dynamic keymaps will start at this if there is no
+// custom config
+#define VIA_EEPROM_CUSTOM_CONFIG_ADDR (VIA_EEPROM_LAYOUT_OPTIONS_ADDR+VIA_EEPROM_LAYOUT_OPTIONS_SIZE)
+
+#ifndef VIA_EEPROM_CUSTOM_CONFIG_SIZE
+#   define VIA_EEPROM_CUSTOM_CONFIG_SIZE 0
+#endif
+
+// This is changed only when the command IDs change,
+// so VIA Configurator can detect compatible firmware. 
+#define VIA_PROTOCOL_VERSION 0x0009
+
+enum via_command_id
+{
+    id_get_protocol_version = 0x01, // always 0x01
+    id_get_keyboard_value,
+    id_set_keyboard_value,
+    id_dynamic_keymap_get_keycode,
+    id_dynamic_keymap_set_keycode,
+    id_dynamic_keymap_reset,
+    id_backlight_config_set_value,
+    id_backlight_config_get_value,
+    id_backlight_config_save,
+    id_eeprom_reset,
+    id_bootloader_jump,
+    id_dynamic_keymap_macro_get_count,
+    id_dynamic_keymap_macro_get_buffer_size,
+    id_dynamic_keymap_macro_get_buffer,
+    id_dynamic_keymap_macro_set_buffer,
+    id_dynamic_keymap_macro_reset,
+    id_dynamic_keymap_get_layer_count,
+    id_dynamic_keymap_get_buffer,
+    id_dynamic_keymap_set_buffer,
+    id_unhandled = 0xFF,
+};
+
+enum via_keyboard_value_id
+{
+  id_uptime = 0x01,
+  id_layout_options,
+  id_switch_matrix_state
+};
+
+// Can't use SAFE_RANGE here, it might change if someone adds
+// new values to enum quantum_keycodes.
+// Need to keep checking 0x5F10 is still in the safe range.
+// TODO: merge this into quantum_keycodes
+// Backlight keycodes are in range 0x5F00-0x5F0F
+enum via_keycodes {
+    FN_MO13 = 0x5F10,
+    FN_MO23,
+    MACRO00,
+    MACRO01,
+    MACRO02,
+    MACRO03,
+    MACRO04,
+    MACRO05,
+    MACRO06,
+    MACRO07,
+    MACRO08,
+    MACRO09,
+    MACRO10,
+    MACRO11,
+    MACRO12,
+    MACRO13,
+    MACRO14,
+    MACRO15,
+};
+
+enum user_keycodes {
+  USER00 = 0x5F80,
+  USER01,
+  USER02,
+  USER03,
+  USER04,
+  USER05,
+  USER06,
+  USER07,
+  USER08,
+  USER09,
+  USER10,
+  USER11,
+  USER12,
+  USER13,
+  USER14,
+  USER15,
+};
+
+// Can be called in an overriding via_init_kb() to test if keyboard level code usage of
+// EEPROM is invalid and use/save defaults.
+bool via_eeprom_is_valid(void);
+
+// Sets VIA/keyboard level usage of EEPROM to valid/invalid
+// Keyboard level code (eg. via_init_kb()) should not call this
+void via_eeprom_set_valid(bool valid);
+
+// Flag QMK and VIA/keyboard level EEPROM as invalid.
+// Used in bootmagic_lite() and VIA command handler.
+// Keyboard level code should not need to call this.
+void via_eeprom_reset(void);
+
+// Called by QMK core to initialize dynamic keymaps etc.
+void via_init(void);
+
+// Used by VIA to store and retrieve the layout options.
+uint32_t via_get_layout_options(void);
+void via_set_layout_options(uint32_t value);
+
+// Called by QMK core to process VIA-specific keycodes.
+bool process_record_via(uint16_t keycode, keyrecord_t *record);
+