try to use https://github.com/qmk/qmk_firmware/pull/24560

common/config.h

@@ -20,22 +20,14 @@
 // enable NKRO by default
 #define FORCE_NKRO
 
-// many settings taken from https://github.com/getreuer/qmk-keymap
-
-// don't confuse apps
-#define TAP_CODE_DELAY 5
-
 // home row mods
-#define TAPPING_TERM 170
+#define CHORDAL_HOLD
-#define TAPPING_TERM_PER_KEY
 #define PERMISSIVE_HOLD
+#define TAPPING_TERM 250
 
 // no auto repeat stuff
 #define QUICK_TAP_TERM 0
 
-// enable streak detection
-#define ACHORDION_STREAK
-
 //
 // underglow configuration
 //

common/keymap.h

@@ -89,65 +89,6 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 };
 
-// many settings taken from https://github.com/getreuer/qmk-keymap
-
-uint16_t get_tapping_term(uint16_t keycode, keyrecord_t* record) {
-  switch (keycode) {
-    // slower for slow fingers
-    case CC_N:
-    case CC_S:
-    case CC_E:
-    case CC_I:
-      return TAPPING_TERM + 15;
-    default:
-      return TAPPING_TERM;
-  }
-}
-
-#include "features/achordion.h"
-
-bool process_record_user(uint16_t keycode, keyrecord_t* record) {
-  if (!process_achordion(keycode, record)) { return false; }
-  return true;
-}
-
-void matrix_scan_user(void) {
-  achordion_task();
-}
-
-bool achordion_chord(uint16_t tap_hold_keycode,
-                     keyrecord_t* tap_hold_record,
-                     uint16_t other_keycode,
-                     keyrecord_t* other_record) {
-  // follow the opposite hands rule.
-  return on_left_hand(tap_hold_record->event.key) !=
-         on_left_hand(other_record->event.key);
-}
-
-
-uint16_t achordion_timeout(uint16_t tap_hold_keycode) {
-  switch (tap_hold_keycode) {
-    default:
-      return 800;  // Use a timeout of 800 ms.
-  }
-}
-
-uint16_t achordion_streak_chord_timeout(
-    uint16_t tap_hold_keycode, uint16_t next_keycode) {
-  // Disable streak detection on LT keys.
-  if (IS_QK_LAYER_TAP(tap_hold_keycode)) {
-    return 0;
-  }
-
-  // Otherwise, tap_hold_keycode is a mod-tap key.
-  const uint8_t mod = mod_config(QK_MOD_TAP_GET_MODS(tap_hold_keycode));
-  if ((mod & (MOD_LSFT | MOD_RSFT)) != 0) {
-    return 100;  // A short streak timeout for Shift mod-tap keys.
-  } else {
-    return 220;  // A longer timeout otherwise.
-  }
-}
-
 #ifndef NO_LED
 
 void keyboard_post_init_user(void) {

keyboards/crkbd/keymaps/christoph-cullmann/keymap.c

@@ -5,10 +5,9 @@
 
 #include QMK_KEYBOARD_H
 
-// Returns true if `pos` on the left hand of the keyboard, false if right.
+char chordal_hold_handedness_user(keypos_t key)
-static bool on_left_hand(keypos_t pos)
 {
-    return pos.row < MATRIX_ROWS / 2;
+    return (key.row < MATRIX_ROWS / 2) ? 'L' : 'R';
 }
 
 // layout helper macro, we just use 42 keys

keyboards/ferris/keymaps/christoph-cullmann/keymap.c

@@ -5,10 +5,9 @@
 
 #include QMK_KEYBOARD_H
 
-// Returns true if `pos` on the left hand of the keyboard, false if right.
+char chordal_hold_handedness_user(keypos_t key)
-static bool on_left_hand(keypos_t pos)
 {
-    return pos.row < MATRIX_ROWS / 2;
+    return (key.row < MATRIX_ROWS / 2) ? 'L' : 'R';
 }
 
 // layout helper macro, we just use 42 keys

keyboards/planck/keymaps/christoph-cullmann/keymap.c

@@ -5,10 +5,9 @@
 
 #include QMK_KEYBOARD_H
 
-// Returns true if `pos` on the left hand of the keyboard, false if right.
+char chordal_hold_handedness_user(keypos_t key)
-static bool on_left_hand(keypos_t pos)
 {
-    return (pos.row < 3) || (pos.row == 3 && pos.col < 3) || (pos.row == 7 && pos.col > 2);
+    return ((key.row < 3) || (key.row == 3 && key.col < 3) || (key.row == 7 && key.col > 2)) ? 'L' : 'R';
 }
 
 // layout helper macro, we just use 42 keys