diff --git a/builddefs/build_keyboard.mk b/builddefs/build_keyboard.mk
index ccd7e50b051..afad67a76da 100644
--- a/builddefs/build_keyboard.mk
+++ b/builddefs/build_keyboard.mk
@@ -186,7 +186,10 @@ endif
 # Have we found a keymap.json?
 ifneq ("$(wildcard $(KEYMAP_JSON))", "")
     ifneq ("$(wildcard $(KEYMAP_C))", "")
-        $(call WARNING_MESSAGE,Keymap is specified as both keymap.json and keymap.c -- keymap.json file wins.)
+        # Allow a separately-found keymap.c next to keymap.json -- the keymap.c
+        # generator will include the other keymap.c in the process, if supplied.
+        OTHER_KEYMAP_C := $(KEYMAP_C)
+        OPT_DEFS += -DOTHER_KEYMAP_C=\"$(OTHER_KEYMAP_C)\"
     endif
 
     KEYMAP_PATH := $(KEYMAP_JSON_PATH)
diff --git a/data/schemas/keymap.jsonschema b/data/schemas/keymap.jsonschema
index 7233e896e94..e967e45c53e 100644
--- a/data/schemas/keymap.jsonschema
+++ b/data/schemas/keymap.jsonschema
@@ -72,10 +72,5 @@
         "notes": {
             "type": "string"
         }
-    },
-    "required": [
-        "keyboard",
-        "layout",
-        "layers"
-    ]
+    }
 }
diff --git a/keyboards/handwired/onekey/info.json b/keyboards/handwired/onekey/info.json
index c952758265b..5cf7c600ee6 100644
--- a/keyboards/handwired/onekey/info.json
+++ b/keyboards/handwired/onekey/info.json
@@ -7,9 +7,6 @@
         "pid": "0x6465",
         "device_version": "0.0.1"
     },
-    "tapping": {
-        "term": 500
-    },
     "diode_direction": "COL2ROW",
     "features": {
         "bootmagic": false,
diff --git a/keyboards/handwired/onekey/kb2040/config.h b/keyboards/handwired/onekey/kb2040/config.h
index e0bf180056e..e9c4eef273c 100644
--- a/keyboards/handwired/onekey/kb2040/config.h
+++ b/keyboards/handwired/onekey/kb2040/config.h
@@ -3,9 +3,6 @@
 
 #pragma once
 
-
-#define DEBUG_MATRIX_SCAN_RATE
-
 #define QMK_WAITING_TEST_BUSY_PIN GP8
 #define QMK_WAITING_TEST_YIELD_PIN GP9
 
@@ -18,4 +15,4 @@
 #define I2C_DRIVER I2CD0
 #define I2C1_SDA_PIN GP12
 #define I2C1_SCL_PIN GP13
- 
+
diff --git a/keyboards/handwired/onekey/keymaps/adc/keymap.json b/keyboards/handwired/onekey/keymaps/adc/keymap.json
new file mode 100644
index 00000000000..e051d1a30bc
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/adc/keymap.json
@@ -0,0 +1,10 @@
+{
+    "config": {
+        "features": {
+            "console": true
+        },
+        "tapping": {
+            "term": 500
+        }
+    }
+}
diff --git a/keyboards/handwired/onekey/keymaps/adc/rules.mk b/keyboards/handwired/onekey/keymaps/adc/rules.mk
index 8b36baccb0f..cc588202788 100644
--- a/keyboards/handwired/onekey/keymaps/adc/rules.mk
+++ b/keyboards/handwired/onekey/keymaps/adc/rules.mk
@@ -1,3 +1 @@
-CONSOLE_ENABLE = yes
-
 ANALOG_DRIVER_REQUIRED = yes
diff --git a/keyboards/handwired/onekey/keymaps/apa102/config.h b/keyboards/handwired/onekey/keymaps/apa102/config.h
deleted file mode 100644
index bb618d77fbc..00000000000
--- a/keyboards/handwired/onekey/keymaps/apa102/config.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#pragma once
-
-#define RGBLIGHT_LED_COUNT 40
-#define APA102_DEFAULT_BRIGHTNESS 5
-#define RGBLIGHT_EFFECT_BREATHING
-#define RGBLIGHT_EFFECT_RAINBOW_MOOD
-#define RGBLIGHT_EFFECT_RAINBOW_SWIRL
-#define RGBLIGHT_EFFECT_SNAKE
-#define RGBLIGHT_EFFECT_KNIGHT
-#define RGBLIGHT_EFFECT_CHRISTMAS
-#define RGBLIGHT_EFFECT_STATIC_GRADIENT
-#define RGBLIGHT_EFFECT_RGB_TEST
-#define RGBLIGHT_EFFECT_ALTERNATING
-#define RGBLIGHT_EFFECT_TWINKLE
diff --git a/keyboards/handwired/onekey/keymaps/apa102/keymap.json b/keyboards/handwired/onekey/keymaps/apa102/keymap.json
new file mode 100644
index 00000000000..917d39eb33c
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/apa102/keymap.json
@@ -0,0 +1,29 @@
+{
+    "config": {
+        "features": {
+            "rgblight": true
+        },
+        "tapping": {
+            "term": 500
+        },
+        "rgblight": {
+            "driver": "apa102",
+            "led_count": 40,
+            "default": {
+                "val": 5
+            },
+            "animations": {
+                "breathing": true,
+                "rainbow_mood": true,
+                "rainbow_swirl": true,
+                "snake": true,
+                "knight": true,
+                "christmas": true,
+                "static_gradient": true,
+                "rgb_test": true,
+                "alternating": true,
+                "twinkle": true
+            }
+        }
+    }
+}
diff --git a/keyboards/handwired/onekey/keymaps/apa102/rules.mk b/keyboards/handwired/onekey/keymaps/apa102/rules.mk
deleted file mode 100644
index 5f15fa9e708..00000000000
--- a/keyboards/handwired/onekey/keymaps/apa102/rules.mk
+++ /dev/null
@@ -1,2 +0,0 @@
-RGBLIGHT_ENABLE = yes
-RGBLIGHT_DRIVER = apa102
diff --git a/keyboards/handwired/onekey/keymaps/backlight/config.h b/keyboards/handwired/onekey/keymaps/backlight/config.h
deleted file mode 100644
index af01528b434..00000000000
--- a/keyboards/handwired/onekey/keymaps/backlight/config.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-#define BACKLIGHT_BREATHING
diff --git a/keyboards/handwired/onekey/keymaps/backlight/keymap.json b/keyboards/handwired/onekey/keymaps/backlight/keymap.json
new file mode 100644
index 00000000000..e8895520cd4
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/backlight/keymap.json
@@ -0,0 +1,14 @@
+{
+    "config": {
+        "features": {
+            "backlight": true,
+            "tap_dance": true
+        },
+        "tapping": {
+            "term": 500
+        },
+        "backlight": {
+            "breathing": true
+        }
+    }
+}
diff --git a/keyboards/handwired/onekey/keymaps/backlight/rules.mk b/keyboards/handwired/onekey/keymaps/backlight/rules.mk
deleted file mode 100644
index 176e099770c..00000000000
--- a/keyboards/handwired/onekey/keymaps/backlight/rules.mk
+++ /dev/null
@@ -1,2 +0,0 @@
-BACKLIGHT_ENABLE = yes
-TAP_DANCE_ENABLE = yes
diff --git a/keyboards/handwired/onekey/keymaps/console/keymap.json b/keyboards/handwired/onekey/keymaps/console/keymap.json
new file mode 100644
index 00000000000..f451f7df04c
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/console/keymap.json
@@ -0,0 +1,8 @@
+{
+    "config": {
+        "features": {
+            "console": true,
+            "debug_matrix_scan_rate": true
+        }
+    }
+}
diff --git a/keyboards/handwired/onekey/keymaps/console/rules.mk b/keyboards/handwired/onekey/keymaps/console/rules.mk
deleted file mode 100644
index 7c83606d2d7..00000000000
--- a/keyboards/handwired/onekey/keymaps/console/rules.mk
+++ /dev/null
@@ -1,2 +0,0 @@
-CONSOLE_ENABLE = yes
-DEBUG_MATRIX_SCAN_RATE_ENABLE = yes
diff --git a/keyboards/handwired/onekey/keymaps/default/keymap.json b/keyboards/handwired/onekey/keymaps/default/keymap.json
new file mode 100644
index 00000000000..5cd219693a3
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/default/keymap.json
@@ -0,0 +1,7 @@
+{
+    "config": {
+        "tapping": {
+            "term": 500
+        }
+    }
+}
diff --git a/keyboards/handwired/onekey/rp2040/config.h b/keyboards/handwired/onekey/rp2040/config.h
index 0563ebfa5f1..0030e97b0fe 100644
--- a/keyboards/handwired/onekey/rp2040/config.h
+++ b/keyboards/handwired/onekey/rp2040/config.h
@@ -3,9 +3,6 @@
 
 #pragma once
 
-
-#define DEBUG_MATRIX_SCAN_RATE
-
 #define QMK_WAITING_TEST_BUSY_PIN GP8
 #define QMK_WAITING_TEST_YIELD_PIN GP9
 
diff --git a/keyboards/handwired/pterodactyl/keymaps/default/keymap.c b/keyboards/handwired/pterodactyl/keymaps/default/keymap.c
index 61d650c76b0..c53f6841cef 100644
--- a/keyboards/handwired/pterodactyl/keymaps/default/keymap.c
+++ b/keyboards/handwired/pterodactyl/keymaps/default/keymap.c
@@ -54,7 +54,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  * |------+------+------+------+------+------|                    |------+------+------+------+------+------|
  * |      |   %  |   ^  |   [  |   ]  |   ~  |                    |   &  |   1  |   2  |   3  |   \  |      |
  * |------+------+------+------+------+------'                    `------+------+------+------+------+------|
- * |QK_BOOT |      |      |      |      |                                  |      |   .  |   0  |   =  |      |
+ * |BtLdr |      |      |      |      |                                  |      |   .  |   0  |   =  |      |
  * `----------------------------------'                                  `----------------------------------'
  *                                      ,-------------.  ,-------------.
  *                                      |      |      |  |      |      |
diff --git a/keyboards/handwired/pterodactyl/keymaps/default/keymap.json b/keyboards/handwired/pterodactyl/keymaps/default/keymap.json
deleted file mode 100644
index 181b32b8c3a..00000000000
--- a/keyboards/handwired/pterodactyl/keymaps/default/keymap.json
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-  "version": 1,
-  "notes": "",
-  "author": "Marcus Young",
-  "keyboard": "handwired/pterodactyl",
-  "keymap": "default",
-  "layout": "LAYOUT",
-  "layers": [
-    [
-      "KC_EQL",       "KC_1",         "KC_2",          "KC_3",    "KC_4",    "KC_5",       "KC_6",    "KC_7",    "KC_8",    "KC_9",    "KC_0",            "KC_MINS",
-      "KC_DEL",       "KC_Q",         "KC_W",          "KC_E",    "KC_R",    "KC_T",       "KC_Y",    "KC_U",    "KC_I",    "KC_O",    "KC_P",            "KC_BSLS",
-      "KC_BSPC",      "KC_A",         "KC_S",          "KC_D",    "KC_F",    "KC_G",       "KC_H",    "KC_J",    "KC_K",    "KC_L",    "LT(2,KC_SCLN)",   "LGUI_T(KC_QUOT)",
-      "KC_LSFT",      "LCTL_T(KC_Z)", "KC_X",          "KC_C",    "KC_V",    "KC_B",       "KC_N",    "KC_M",    "KC_COMM", "KC_DOT",  "LCTL_T(KC_SLSH)", "KC_RSFT",
-      "LT(1,KC_GRV)", "KC_QUOT",      "LALT(KC_LSFT)", "KC_LEFT", "KC_RGHT",                          "KC_UP",   "KC_DOWN", "KC_LBRC", "KC_RBRC",         "TT(1)",
-
-                                                           "LALT_T(KC_APP)", "KC_LGUI",    "KC_RALT", "LCTL_T(KC_ESC)",
-                                                                             "KC_HOME",    "KC_PGUP",
-                                                       "KC_SPC",  "KC_BSPC", "KC_END",     "KC_PGDN", "KC_TAB",  "KC_ENT"
-    ],
-    [
-      "KC_TRNS", "KC_F1",   "KC_F2",   "KC_F3",   "KC_F4",   "KC_F5",      "KC_F6",   "KC_F7",   "KC_F8",   "KC_F9",   "KC_F10",  "KC_F11",
-      "KC_TRNS", "KC_EXLM", "KC_AT",   "KC_LCBR", "KC_RCBR", "KC_PIPE",    "KC_UP",   "KC_7",    "KC_8",    "KC_9",    "KC_ASTR", "KC_F12",
-      "KC_TRNS", "KC_HASH", "KC_DLR",  "KC_LPRN", "KC_RPRN", "KC_GRV",     "KC_DOWN", "KC_4",    "KC_5",    "KC_6",    "KC_PLUS", "KC_TRNS",
-      "KC_TRNS", "KC_PERC", "KC_CIRC", "KC_LBRC", "KC_RBRC", "KC_TILD",    "KC_AMPR", "KC_1",    "KC_2",    "KC_3",    "KC_BSLS", "KC_TRNS",
-      "QK_BOOT", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS",                          "KC_TRNS", "KC_DOT",  "KC_0",    "KC_EQL",  "KC_TRNS",
-
-                                                  "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS",
-                                                             "KC_TRNS",    "KC_TRNS",
-                                       "KC_TRNS", "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_TRNS"
-    ],
-    [
-      "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS",
-      "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_MS_U", "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS",
-      "KC_TRNS", "KC_TRNS", "KC_MS_L", "KC_MS_D", "KC_MS_R", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_MPLY",
-      "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_MPRV", "KC_MNXT", "KC_TRNS", "KC_TRNS",
-      "KC_TRNS", "KC_TRNS", "KC_TRNS", "KC_BTN1", "KC_BTN2", "KC_VOLU",    "KC_VOLD", "KC_MUTE", "KC_TRNS", "KC_TRNS",
-
-                                                  "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS",
-                                                             "KC_TRNS",    "KC_TRNS",
-                                       "KC_TRNS", "KC_TRNS", "KC_TRNS",    "KC_TRNS", "KC_TRNS", "KC_WBAK"
-    ]
-  ]
-}
diff --git a/lib/python/qmk/commands.py b/lib/python/qmk/commands.py
index 97d9c5032c8..a05b3641b5c 100644
--- a/lib/python/qmk/commands.py
+++ b/lib/python/qmk/commands.py
@@ -55,7 +55,7 @@ def parse_configurator_json(configurator_file):
         cli.log.error(f'Invalid JSON keymap: {configurator_file} : {e.message}')
         maybe_exit(1)
 
-    keyboard = user_keymap['keyboard']
+    keyboard = user_keymap.get('keyboard', None)
     aliases = keyboard_alias_definitions()
 
     while keyboard in aliases:
diff --git a/lib/python/qmk/keymap.py b/lib/python/qmk/keymap.py
index 97c358788a5..9dd043c4a89 100644
--- a/lib/python/qmk/keymap.py
+++ b/lib/python/qmk/keymap.py
@@ -29,38 +29,40 @@ __INCLUDES__
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
-const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
 __KEYMAP_GOES_HERE__
-};
-
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
 __ENCODER_MAP_GOES_HERE__
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-
 __MACRO_OUTPUT_GOES_HERE__
+
+#ifdef OTHER_KEYMAP_C
+#    include OTHER_KEYMAP_C
+#endif // OTHER_KEYMAP_C
 """
 
 
 def _generate_keymap_table(keymap_json):
-    lines = []
+    lines = ['const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {']
     for layer_num, layer in enumerate(keymap_json['layers']):
         if layer_num != 0:
             lines[-1] = lines[-1] + ','
         layer = map(_strip_any, layer)
         layer_keys = ', '.join(layer)
         lines.append('    [%s] = %s(%s)' % (layer_num, keymap_json['layout'], layer_keys))
+    lines.append('};')
     return lines
 
 
 def _generate_encodermap_table(keymap_json):
-    lines = []
+    lines = [
+        '#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)',
+        'const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {',
+    ]
     for layer_num, layer in enumerate(keymap_json['encoders']):
         if layer_num != 0:
             lines[-1] = lines[-1] + ','
         encoder_keycode_txt = ', '.join([f'ENCODER_CCW_CW({_strip_any(e["ccw"])}, {_strip_any(e["cw"])})' for e in layer])
         lines.append('    [%s] = {%s}' % (layer_num, encoder_keycode_txt))
+    lines.extend(['};', '#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)'])
     return lines
 
 
@@ -271,8 +273,11 @@ def generate_c(keymap_json):
             A sequence of strings containing macros to implement for this keyboard.
     """
     new_keymap = DEFAULT_KEYMAP_C
-    layer_txt = _generate_keymap_table(keymap_json)
-    keymap = '\n'.join(layer_txt)
+
+    keymap = ''
+    if 'layers' in keymap_json and keymap_json['layers'] is not None:
+        layer_txt = _generate_keymap_table(keymap_json)
+        keymap = '\n'.join(layer_txt)
     new_keymap = new_keymap.replace('__KEYMAP_GOES_HERE__', keymap)
 
     encodermap = ''
diff --git a/lib/python/qmk/tests/test_cli_commands.py b/lib/python/qmk/tests/test_cli_commands.py
index b10fd8d19d5..dd659fe0f27 100644
--- a/lib/python/qmk/tests/test_cli_commands.py
+++ b/lib/python/qmk/tests/test_cli_commands.py
@@ -152,17 +152,16 @@ def test_json2c():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT_ortho_1x1(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    include OTHER_KEYMAP_C
+#endif // OTHER_KEYMAP_C
 
 
 """
@@ -190,28 +189,21 @@ def test_json2c_stdin():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT_ortho_1x1(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    include OTHER_KEYMAP_C
+#endif // OTHER_KEYMAP_C
 
 
 """
 
 
-def test_json2c_wrong_json():
-    result = check_subcommand('json2c', 'keyboards/handwired/pytest/info.json')
-    check_returncode(result, [1])
-    assert 'Invalid JSON keymap' in result.stdout
-
-
 def test_json2c_no_json():
     result = check_subcommand('json2c', 'keyboards/handwired/pytest/basic/keymaps/default/keymap.c')
     check_returncode(result, [1])
diff --git a/lib/python/qmk/tests/test_qmk_keymap.py b/lib/python/qmk/tests/test_qmk_keymap.py
index 7482848eff1..80cc679b007 100644
--- a/lib/python/qmk/tests/test_qmk_keymap.py
+++ b/lib/python/qmk/tests/test_qmk_keymap.py
@@ -20,17 +20,16 @@ def test_generate_c_pytest_basic():
  * This file was generated by qmk json2c. You may or may not want to
  * edit it directly.
  */
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(KC_A)
 };
 
-#if defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
-const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
-
-};
-#endif // defined(ENCODER_ENABLE) && defined(ENCODER_MAP_ENABLE)
 
 
+#ifdef OTHER_KEYMAP_C
+#    include OTHER_KEYMAP_C
+#endif // OTHER_KEYMAP_C
 """