diff --git a/.phpstorm.meta.php/magento_helpers.meta.php b/.phpstorm.meta.php/magento_helpers.meta.php
index 5971fb5ca06..900e74533cf 100644
--- a/.phpstorm.meta.php/magento_helpers.meta.php
+++ b/.phpstorm.meta.php/magento_helpers.meta.php
@@ -2,10 +2,6 @@
 namespace PHPSTORM_META {
     override( \Mage::helper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -96,6 +92,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
diff --git a/.phpstorm.meta.php/magento_helpers_methods.meta.php b/.phpstorm.meta.php/magento_helpers_methods.meta.php
index e55d8b590b3..0a8d465cf24 100644
--- a/.phpstorm.meta.php/magento_helpers_methods.meta.php
+++ b/.phpstorm.meta.php/magento_helpers_methods.meta.php
@@ -2,10 +2,6 @@
 namespace PHPSTORM_META {
     override( \Mage_Admin_Model_User::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -96,6 +92,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -203,10 +202,6 @@
     );
     override( \Mage_Adminhtml_Controller_Rss_Abstract::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -297,6 +292,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -404,10 +402,6 @@
     );
     override( \Mage_Adminhtml_Tax_RuleController::_getHelperModel(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -498,6 +492,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -605,10 +602,6 @@
     );
     override( \Mage_Api_Model_User::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -699,6 +692,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -806,10 +802,6 @@
     );
     override( \Mage_Bundle_Model_Product_Price::_getHelperData(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -900,6 +892,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -1007,10 +1002,6 @@
     );
     override( \Mage_Core_Block_Abstract::helper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -1101,6 +1092,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -1208,10 +1202,6 @@
     );
     override( \Mage_Core_Model_App::getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -1302,6 +1292,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -1409,10 +1402,6 @@
     );
     override( \Mage_Core_Model_Factory::getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -1503,6 +1492,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -1610,10 +1602,6 @@
     );
     override( \Mage_Core_Model_Layout::helper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -1704,6 +1692,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -1811,10 +1802,6 @@
     );
     override( \Mage_Customer_AccountController::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -1905,6 +1892,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -2012,10 +2002,6 @@
     );
     override( \Mage_Customer_Model_Customer::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -2106,6 +2092,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -2213,10 +2202,6 @@
     );
     override( \Mage_ImportExport_Model_Import_Entity_Product::getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -2307,6 +2292,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -2414,10 +2402,6 @@
     );
     override( \Mage_Rss_Controller_Abstract::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -2508,6 +2492,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -2615,10 +2602,6 @@
     );
     override( \Mage_SalesRule_Model_Validator::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -2709,6 +2692,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -2816,10 +2802,6 @@
     );
     override( \Mage_Weee_Helper_Data::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -2910,6 +2892,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
@@ -3017,10 +3002,6 @@
     );
     override( \Mage_Weee_Model_Config_Source_Fpt_Tax::_getHelper(0),
         map( [
-            'mm_ignition' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/data' => \MM_Ignition_Helper_Data::class,
-            'mm_ignition/flare' => \MM_Ignition_Helper_Flare::class,
-            'mm_ignition/openAi' => \MM_Ignition_Helper_OpenAi::class,
             'adminnotification' => \Mage_AdminNotification_Helper_Data::class,
             'adminnotification/data' => \Mage_AdminNotification_Helper_Data::class,
             'admin/block' => \Mage_Admin_Helper_Block::class,
@@ -3111,6 +3092,9 @@
             'core/hint' => \Mage_Core_Helper_Hint::class,
             'core/http' => \Mage_Core_Helper_Http::class,
             'core/js' => \Mage_Core_Helper_Js::class,
+            'core/log' => \Mage_Core_Helper_Log::class,
+            'core/measure_length' => \Mage_Core_Helper_Measure_Length::class,
+            'core/measure_weight' => \Mage_Core_Helper_Measure_Weight::class,
             'core/purifier' => \Mage_Core_Helper_Purifier::class,
             'core/security' => \Mage_Core_Helper_Security::class,
             'core/string' => \Mage_Core_Helper_String::class,
diff --git a/.phpstorm.meta.php/magento_models.meta.php b/.phpstorm.meta.php/magento_models.meta.php
index 6859629995a..577b7ef53de 100644
--- a/.phpstorm.meta.php/magento_models.meta.php
+++ b/.phpstorm.meta.php/magento_models.meta.php
@@ -8,11 +8,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -3172,11 +3167,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
diff --git a/.phpstorm.meta.php/magento_models_methods.meta.php b/.phpstorm.meta.php/magento_models_methods.meta.php
index 2b6431c9f3a..8c60cceccfd 100644
--- a/.phpstorm.meta.php/magento_models_methods.meta.php
+++ b/.phpstorm.meta.php/magento_models_methods.meta.php
@@ -8,11 +8,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -3172,11 +3167,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -6336,11 +6326,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -9500,11 +9485,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -12664,11 +12644,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -15828,11 +15803,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -18992,11 +18962,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -22156,11 +22121,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
@@ -25320,11 +25280,6 @@
             'cm_redissession/session_config' => \Cm_RedisSession_Model_Session_Config::class,
             'cm_redissession/session_handler' => \Cm_RedisSession_Model_Session_Handler::class,
             'cm_redissession/session_logger' => \Cm_RedisSession_Model_Session_Logger::class,
-            'mm_ignition/observer_abstract' => \MM_Ignition_Model_Observer_Abstract::class,
-            'mm_ignition/observer_handleIgnitionException' => \MM_Ignition_Model_Observer_HandleIgnitionException::class,
-            'mm_ignition/observer_handleIgnitionRegister' => \MM_Ignition_Model_Observer_HandleIgnitionRegister::class,
-            'mm_ignition/system_config_source_editor' => \MM_Ignition_Model_System_Config_Source_Editor::class,
-            'mm_ignition/system_config_source_theme' => \MM_Ignition_Model_System_Config_Source_Theme::class,
             'adminnotification/feed' => \Mage_AdminNotification_Model_Feed::class,
             'adminnotification/inbox' => \Mage_AdminNotification_Model_Inbox::class,
             'adminnotification/mysql4_inbox' => \Mage_AdminNotification_Model_Mysql4_Inbox::class,
diff --git a/.rector.php b/.rector.php
index 6d994316a2f..0648c907e11 100644
--- a/.rector.php
+++ b/.rector.php
@@ -47,6 +47,11 @@
             Php85\ArrayDimFetch\ArrayFirstLastRector::class,
         ])
         ->withConfiguredRule(RenameClassConstFetchRector::class, [
+            new RenameClassAndConstFetch('Mage_Core_Helper_Data', 'XML_PATH_DEV_LOG_ENABLED', 'Mage_Core_Helper_Log', 'XML_PATH_DEV_LOG_ENABLED'),
+            new RenameClassAndConstFetch('Mage_Core_Helper_Data', 'XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS', 'Mage_Core_Helper_Log', 'XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS'),
+            new RenameClassAndConstFetch('Mage_Core_Helper_Data', 'XML_PATH_DEV_LOG_FILE', 'Mage_Core_Helper_Log', 'XML_PATH_DEV_LOG_FILE'),
+            new RenameClassAndConstFetch('Mage_Core_Helper_Data', 'XML_PATH_DEV_LOG_EXCEPTION_FILE', 'Mage_Core_Helper_Log', 'XML_PATH_DEV_LOG_EXCEPTION_FILE'),
+            new RenameClassAndConstFetch('Mage_Core_Helper_Data', 'XML_PATH_DEV_LOG_MAX_LEVEL', 'Mage_Core_Helper_Log', 'XML_PATH_DEV_LOG_MAX_LEVEL'),
             new RenameClassAndConstFetch('Zend_Log', 'EMERG', 'Monolog\Level', 'Emergency'),
             new RenameClassAndConstFetch('Zend_Log', 'ALERT', 'Monolog\Level', 'Alert'),
             new RenameClassAndConstFetch('Zend_Log', 'CRIT', 'Monolog\Level', 'Critical'),
diff --git a/app/Mage.php b/app/Mage.php
index 209e2cfc42a..ebad3155046 100644
--- a/app/Mage.php
+++ b/app/Mage.php
@@ -8,10 +8,7 @@
  */
 
 use Carbon\Carbon;
-use Monolog\Formatter\LineFormatter;
-use Monolog\Handler\StreamHandler;
 use Monolog\Level;
-use Monolog\Logger;
 
 defined('DS') || define('DS', DIRECTORY_SEPARATOR);
 defined('PS') || define('PS', PATH_SEPARATOR);
@@ -886,93 +883,10 @@ public static function log($message, $level = null, $file = '', $forceLog = fals
         }
 
         try {
-            $logActive = self::getStoreConfigFlag(Mage_Core_Helper_Data::XML_PATH_DEV_LOG_ENABLED);
-            if (empty($file)) {
-                $file = self::getStoreConfig(Mage_Core_Helper_Data::XML_PATH_DEV_LOG_FILE);
+            $logger = self::getModel('core/logger');
+            if ($logger instanceof Mage_Core_Model_Logger) {
+                $logger->log($message, $level, $file, $forceLog, $context);
             }
-        } catch (Exception) {
-            $logActive = true;
-        }
-
-        if (!self::$_isDeveloperMode && !$logActive && !$forceLog) {
-            return;
-        }
-
-        static $loggers = [];
-
-        try {
-            $maxLogLevel = self::getStoreConfigAsInt(Mage_Core_Helper_Data::XML_PATH_DEV_LOG_MAX_LEVEL);
-        } catch (Throwable) {
-            $maxLogLevel = Level::Debug->value;
-        }
-
-        // Normalize both $level and $maxLogLevel to integers for comparison
-        if ($level instanceof Level) {
-            $levelValue = $level->value;
-        } elseif (is_null($level)) {
-            $levelValue = Level::Debug->value;
-        } else {
-            $levelValue = (int) $level;
-        }
-
-        if (!self::$_isDeveloperMode && $levelValue > $maxLogLevel && !$forceLog) {
-            return;
-        }
-
-        $file = empty($file)
-            ? (string) self::getConfig()->getNode(
-                Mage_Core_Helper_Data::XML_PATH_DEV_LOG_FILE,
-                Mage_Core_Model_Store::DEFAULT_CODE,
-            ) : basename($file);
-
-        try {
-            if (!isset($loggers[$file])) {
-                // Validate file extension before save. Allowed file extensions: log, txt, html, csv
-                $_allowedFileExtensions = explode(
-                    ',',
-                    (string) self::getConfig()->getNode(
-                        Mage_Core_Helper_Data::XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS,
-                        Mage_Core_Model_Store::DEFAULT_CODE,
-                    ),
-                );
-                if (! ($extension = pathinfo($file, PATHINFO_EXTENSION)) || ! in_array($extension, $_allowedFileExtensions)) {
-                    return;
-                }
-
-                $logDir = self::getBaseDir('var') . DS . 'log';
-                $logFile = $logDir . DS . $file;
-
-                if (!is_dir($logDir)) {
-                    mkdir($logDir);
-                    chmod($logDir, 0750);
-                }
-
-                if (!file_exists($logFile)) {
-                    file_put_contents($logFile, '');
-                    chmod($logFile, 0640);
-                }
-
-                $format = '%datetime% %level_name% (%level%): %message% %context% %extra%' . PHP_EOL;
-                $formatter = new LineFormatter($format, null, true, true, true);
-                $writerModel = (string) self::getConfig()->getNode('global/log/core/writer_model');
-                if (!self::$_app || !$writerModel) {
-                    $writer = new StreamHandler($logFile, Level::Debug);
-                } else {
-                    $writer = new $writerModel($logFile, Level::Debug);
-                }
-
-                $writer->setFormatter($formatter);
-                $logger = new Logger('OpenMage');
-                $logger->pushHandler($writer);
-                $loggers[$file] = $logger;
-            }
-
-            if (is_array($message) || is_object($message)) {
-                $message = print_r($message, true);
-            }
-
-            $message = addcslashes($message, '<?');
-            $loggers[$file]->log($levelValue, $message, $context);
         } catch (Exception) {
         }
     }
@@ -980,14 +894,14 @@ public static function log($message, $level = null, $file = '', $forceLog = fals
     /**
      * Write exception to log
      */
-    public static function logException(Throwable $e)
+    public static function logException(Throwable $throwable)
     {
         if (!self::getConfig()) {
             return;
         }
 
-        $file = self::getStoreConfig(Mage_Core_Helper_Data::XML_PATH_DEV_LOG_EXCEPTION_FILE);
-        self::log("\n" . $e->__toString(), Level::Error, $file);
+        $file = self::getStoreConfig(Mage_Core_Helper_Log::XML_PATH_DEV_LOG_EXCEPTION_FILE);
+        self::log("\n" . $throwable->__toString(), Level::Error, $file);
     }
 
     /**
diff --git a/app/code/core/Mage/Adminhtml/Model/System/Config/Source/Log/Level.php b/app/code/core/Mage/Adminhtml/Model/System/Config/Source/Log/Level.php
index ba1f32d82d1..77e2a54ab84 100644
--- a/app/code/core/Mage/Adminhtml/Model/System/Config/Source/Log/Level.php
+++ b/app/code/core/Mage/Adminhtml/Model/System/Config/Source/Log/Level.php
@@ -7,6 +7,7 @@
  * @package    Mage_Adminhtml
  */
 
+use Mage_Core_Helper_Log as Log;
 use Monolog\Level;
 
 /**
@@ -21,14 +22,14 @@ public function toOptionArray()
         $helper = Mage::helper('adminhtml');
 
         return [
-            Level::Emergency->value => $helper->__('Emergency'),
-            Level::Alert->value     => $helper->__('Alert'),
-            Level::Critical->value  => $helper->__('Critical'),
-            Level::Error->value     => $helper->__('Error'),
-            Level::Warning->value   => $helper->__('Warning'),
-            Level::Notice->value    => $helper->__('Notice'),
-            Level::Info->value      => $helper->__('Informational'),
-            Level::Debug->value     => $helper->__('Debug'),
+            Log::getLogLevelValue(Level::Emergency) => $helper->__('Emergency'),
+            Log::getLogLevelValue(Level::Alert)     => $helper->__('Alert'),
+            Log::getLogLevelValue(Level::Critical)  => $helper->__('Critical'),
+            Log::getLogLevelValue(Level::Error)     => $helper->__('Error'),
+            Log::getLogLevelValue(Level::Warning)   => $helper->__('Warning'),
+            Log::getLogLevelValue(Level::Notice)    => $helper->__('Notice'),
+            Log::getLogLevelValue(Level::Info)      => $helper->__('Informational'),
+            Log::getLogLevelValue(Level::Debug)     => $helper->__('Debug'),
         ];
     }
 }
diff --git a/app/code/core/Mage/Core/Helper/Data.php b/app/code/core/Mage/Core/Helper/Data.php
index 4e5880fac97..ddef245ba0c 100644
--- a/app/code/core/Mage/Core/Helper/Data.php
+++ b/app/code/core/Mage/Core/Helper/Data.php
@@ -27,15 +27,30 @@ class Mage_Core_Helper_Data extends Mage_Core_Helper_Abstract
 
     public const XML_PATH_DEV_ALLOW_IPS                = 'dev/restrict/allow_ips';
 
-    public const XML_PATH_DEV_LOG_ENABLED              = 'dev/log/active';
+    /**
+     * @deprecated use Mage_Core_Helper_Log::XML_PATH_DEV_LOG_ENABLED instead
+     */
+    public const XML_PATH_DEV_LOG_ENABLED              = Mage_Core_Helper_Log::XML_PATH_DEV_LOG_ENABLED;
 
-    public const XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS   = 'dev/log/allowedFileExtensions';
+    /**
+     * @deprecated use Mage_Core_Helper_Log::XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS instead
+     */
+    public const XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS   = Mage_Core_Helper_Log::XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS;
 
-    public const XML_PATH_DEV_LOG_FILE                 = 'dev/log/file';
+    /**
+     * @deprecated use Mage_Core_Helper_Log::XML_PATH_DEV_LOG_FILE instead
+     */
+    public const XML_PATH_DEV_LOG_FILE                 = Mage_Core_Helper_Log::XML_PATH_DEV_LOG_FILE;
 
-    public const XML_PATH_DEV_LOG_EXCEPTION_FILE       = 'dev/log/exception_file';
+    /**
+     * @deprecated use Mage_Core_Helper_Log::XML_PATH_DEV_LOG_EXCEPTION_FILE instead
+     */
+    public const XML_PATH_DEV_LOG_EXCEPTION_FILE       = Mage_Core_Helper_Log::XML_PATH_DEV_LOG_EXCEPTION_FILE;
 
-    public const XML_PATH_DEV_LOG_MAX_LEVEL            = 'dev/log/max_level';
+    /**
+     * @deprecated use Mage_Core_Helper_Log::XML_PATH_DEV_LOG_MAX_LEVEL instead
+     */
+    public const XML_PATH_DEV_LOG_MAX_LEVEL            = Mage_Core_Helper_Log::XML_PATH_DEV_LOG_MAX_LEVEL;
 
     public const XML_PATH_CACHE_BETA_TYPES             = 'global/cache/betatypes';
 
diff --git a/app/code/core/Mage/Core/Helper/Log.php b/app/code/core/Mage/Core/Helper/Log.php
new file mode 100644
index 00000000000..2c21bc6e9e3
--- /dev/null
+++ b/app/code/core/Mage/Core/Helper/Log.php
@@ -0,0 +1,181 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  For copyright and license information, read the COPYING.txt file.
+ * @link       /COPYING.txt
+ * @license    Open Software License (OSL 3.0)
+ * @package    Mage_Core
+ */
+
+use Monolog\Level;
+use Monolog\Formatter\FormatterInterface;
+use Monolog\Formatter\LineFormatter;
+use Monolog\Handler\FormattableHandlerInterface;
+use Monolog\Handler\HandlerInterface;
+use Monolog\Handler\StreamHandler;
+
+/**
+ * Core logging helper
+ *
+ * @package    Mage_Core
+ */
+class Mage_Core_Helper_Log extends Mage_Core_Helper_Abstract
+{
+    public const XML_PATH_DEV_LOG_ENABLED              = 'dev/log/active';
+
+    public const XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS   = 'dev/log/allowedFileExtensions';
+
+    public const XML_PATH_DEV_LOG_FILE                 = 'dev/log/file';
+
+    public const XML_PATH_DEV_LOG_EXCEPTION_FILE       = 'dev/log/exception_file';
+
+    public const XML_PATH_DEV_LOG_MAX_LEVEL            = 'dev/log/max_level';
+
+    public const LOG_FORMAT_MONOLOG                    = 1;
+
+    public const LOG_FORMAT_RFC5424                    = 2;
+
+    public const LOG_FORMAT_PSR_3                      = 3;
+
+    protected $_moduleName = 'Mage_Core';
+
+    /**
+     * Retrieve allowed file extensions for log files
+     *
+     * @return string[]
+     */
+    public static function getConfigAllowedFileExtensions(): array
+    {
+        return explode(
+            ',',
+            (string) Mage::getConfig()->getNode(
+                self::XML_PATH_DEV_LOG_ALLOWED_EXTENSIONS,
+                Mage_Core_Model_Store::DEFAULT_CODE,
+            ),
+        );
+    }
+
+    /**
+     * Retrieve log file name from configuration
+     */
+    public static function getConfigLogFile(): string
+    {
+        return (string) Mage::getConfig()->getNode(
+            self::XML_PATH_DEV_LOG_FILE,
+            Mage_Core_Model_Store::DEFAULT_CODE,
+        );
+    }
+
+    /**
+     * Retrieve log handler instance
+     */
+    public static function getHandler(string $logFile, Level $logLevel = Level::Debug): HandlerInterface
+    {
+        $writerModel = (string) Mage::getConfig()->getNode('global/log/core/writer_model');
+        if (!Mage::app() || !$writerModel) {
+            $handler = new StreamHandler($logFile, $logLevel);
+        } else {
+            $handler = new $writerModel($logFile, $logLevel);
+        }
+
+        if ($handler instanceof FormattableHandlerInterface) {
+            $format = '%datetime% %level_name% (%level%): %message% %context% %extra%' . PHP_EOL;
+            $handler->setFormatter(self::getLineFormatter(
+                format: $format,
+                allowInlineLineBreaks: true,
+                ignoreEmptyContextAndExtra: true,
+                includeStacktraces: true,
+            ));
+        }
+
+        return $handler;
+    }
+
+    /**
+     * Retrieve line formatter instance
+     */
+    public static function getLineFormatter(
+        ?string $format = null,
+        ?string $dateFormat = null,
+        bool $allowInlineLineBreaks = false,
+        bool $ignoreEmptyContextAndExtra = false,
+        bool $includeStacktraces = false,
+    ): FormatterInterface {
+        return new LineFormatter(
+            format: $format,
+            dateFormat: $dateFormat,
+            allowInlineLineBreaks: $allowInlineLineBreaks,
+            ignoreEmptyContextAndExtra: $ignoreEmptyContextAndExtra,
+            includeStacktraces: $includeStacktraces,
+        );
+    }
+
+    /**
+     * Retrieve log level value
+     *
+     * @param self::LOG_FORMAT_* $format
+     */
+    public static function getLogLevelValue(null|int|Level|string $level, int $format = self::LOG_FORMAT_RFC5424): int|string
+    {
+        return match ($format) {
+            self::LOG_FORMAT_MONOLOG => self::getLogLevel($level)->value,
+            self::LOG_FORMAT_PSR_3 => self::getLogLevel($level)->toPsrLogLevel(),
+            self::LOG_FORMAT_RFC5424 => self::getLogLevel($level)->toRFC5424Level(),
+        };
+    }
+
+    /**
+     * Retrieve log level instance
+     */
+    public static function getLogLevel(null|int|Level|string $level): Level
+    {
+        if (is_null($level)) {
+            return Level::Debug;
+        }
+
+        if ($level instanceof Level) {
+            return $level;
+        }
+
+        if (is_numeric($level)) {
+            $level = (int) $level;
+        }
+
+        if (is_string($level)) {
+            // PSR 3 Log level
+            try {
+                return Level::fromName($level);
+            } catch (UnhandledMatchError) {
+                return Level::Debug;
+            }
+        } else {
+            return match ($level) {
+                7, 100 => Level::Debug,
+                6, 200 => Level::Info,
+                5, 250 => Level::Notice,
+                4, 300 => Level::Warning,
+                3, 400 => Level::Error,
+                2, 500 => Level::Critical,
+                1, 550 => Level::Alert,
+                0, 600 => Level::Emergency,
+                default => Level::Debug,
+            };
+        }
+    }
+
+    /**
+     * Retrieve maximum log level from configuration
+     */
+    public static function getLogLevelMaxValue(): int
+    {
+        try {
+            $maxLogLevel = Mage::getStoreConfigAsInt(self::XML_PATH_DEV_LOG_MAX_LEVEL);
+        } catch (Throwable) {
+            $maxLogLevel = Level::Debug;
+        }
+
+        return self::getLogLevelValue($maxLogLevel);
+    }
+}
diff --git a/app/code/core/Mage/Core/Model/Logger.php b/app/code/core/Mage/Core/Model/Logger.php
index bf07be9ade6..3f07b73135b 100644
--- a/app/code/core/Mage/Core/Model/Logger.php
+++ b/app/code/core/Mage/Core/Model/Logger.php
@@ -7,7 +7,9 @@
  * @package    Mage_Core
  */
 
+use Mage_Core_Helper_Log as HelperLog;
 use Monolog\Level;
+use Monolog\Logger;
 
 /**
  * Logger model
@@ -16,6 +18,12 @@
  */
 class Mage_Core_Model_Logger
 {
+    /** Loggers storage
+     *
+     * @var Logger[]
+     */
+    private static array $loggers = [];
+
     /**
      * Log wrapper
      *
@@ -24,17 +32,100 @@ class Mage_Core_Model_Logger
      * @param string   $file
      * @param bool     $forceLog
      * @param array    $context  additional context for the log entry
+     * @SuppressWarnings("PHPMD.DevelopmentCodeFragment")
      */
     public function log($message, $level = null, $file = '', $forceLog = false, array $context = [])
     {
-        Mage::log($message, $level, $file, $forceLog, $context);
+        $useStdout = in_array($file, ['php://stdout', 'php://stderr'], true);
+
+        if ((bool) $forceLog !== true) {
+            $forceLog = Mage::getIsDeveloperMode();
+        }
+
+        try {
+            $logActive = Mage::getStoreConfigFlag(HelperLog::XML_PATH_DEV_LOG_ENABLED);
+            if (empty($file)) {
+                $file = Mage::getStoreConfig(HelperLog::XML_PATH_DEV_LOG_FILE);
+            }
+        } catch (Throwable) {
+            $logActive = true;
+        }
+
+        if (!$logActive && !$forceLog) {
+            return;
+        }
+
+        $levelValue = HelperLog::getLogLevelValue($level);
+
+        if ($levelValue > HelperLog::getLogLevelMaxValue() && !$forceLog) {
+            return;
+        }
+
+        if (!$useStdout) {
+            $file = empty($file) ? HelperLog::getConfigLogFile() : basename($file);
+        }
+
+        try {
+            if (!isset(self::$loggers[$file])) {
+                if ($useStdout) {
+                    $logFile = $file;
+                } else {
+                    $logFile = $this->getLogFilePath($file);
+                    if ($logFile === null) {
+                        return;
+                    }
+                }
+
+                $handler = HelperLog::getHandler($logFile);
+
+                $logger = new Logger('OpenMage');
+                $logger->pushHandler($handler);
+                self::$loggers[$file] = $logger;
+            }
+
+            if (is_array($message) || is_object($message)) {
+                $message = print_r($message, true);
+            }
+
+            $message = addcslashes($message, '<?');
+            self::$loggers[$file]->log($levelValue, $message, $context);
+        } catch (Exception) {
+            // Silent catch
+        }
     }
 
     /**
      * Log exception wrapper
      */
-    public function logException(Exception $e)
+    public function logException(Exception $exception)
     {
-        Mage::logException($e);
+        Mage::logException($exception);
+    }
+
+    /**
+     * Get log file path
+     */
+    protected function getLogFilePath(string $file): ?string
+    {
+        // Validate file extension before save. Allowed file extensions: log, txt, html, csv
+        $_allowedFileExtensions = HelperLog::getConfigAllowedFileExtensions();
+        if (! ($extension = pathinfo($file, PATHINFO_EXTENSION)) || ! in_array($extension, $_allowedFileExtensions)) {
+            return null;
+        }
+
+        $logDir = Mage::getBaseDir('var') . DS . 'log';
+        $logFile = $logDir . DS . $file;
+
+        if (!is_dir($logDir)) {
+            mkdir($logDir);
+            chmod($logDir, 0750);
+        }
+
+        if (!file_exists($logFile)) {
+            file_put_contents($logFile, '');
+            chmod($logFile, 0640);
+        }
+
+        return $logFile;
     }
 }
diff --git a/app/code/core/Mage/Core/etc/config.xml b/app/code/core/Mage/Core/etc/config.xml
index 146f60f73de..b0d7c482628 100644
--- a/app/code/core/Mage/Core/etc/config.xml
+++ b/app/code/core/Mage/Core/etc/config.xml
@@ -10,7 +10,7 @@
 <config>
     <modules>
         <Mage_Core>
-            <version>1.6.0.11</version>
+            <version>1.6.0.10</version>
         </Mage_Core>
     </modules>
     <global>
diff --git a/app/code/core/Mage/Core/sql/core_setup/upgrade-1.6.0.10-1.6.0.11.php b/app/code/core/Mage/Core/sql/core_setup/upgrade-1.6.0.10-1.6.0.11.php
deleted file mode 100644
index f3b7a642a7b..00000000000
--- a/app/code/core/Mage/Core/sql/core_setup/upgrade-1.6.0.10-1.6.0.11.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-/**
- * @copyright  For copyright and license information, read the COPYING.txt file.
- * @link       /COPYING.txt
- * @license    Open Software License (OSL 3.0)
- * @package    Mage_Core
- */
-
-use Monolog\Level;
-
-/** @var Mage_Core_Model_Resource_Setup $this */
-$installer = $this;
-$installer->startSetup();
-
-$connection = $installer->getConnection();
-$table = $installer->getTable('core/config_data');
-
-$select = $connection->select()
-    ->from($table)
-    ->where('path = ?', Mage_Core_Helper_Data::XML_PATH_DEV_LOG_MAX_LEVEL);
-
-$logConfig = $connection->fetchAll($select);
-
-foreach ($logConfig as $config) {
-    $zendValue = (int) $config['value'];
-    $monologValue = match ($zendValue) {
-        0 => Level::Emergency->value,
-        1 => Level::Alert->value,
-        2 => Level::Critical->value,
-        3 => Level::Error->value,
-        4 => Level::Warning->value,
-        5 => Level::Notice->value,
-        6 => Level::Info->value,
-        default => Level::Debug->value,
-    };
-
-    $connection->insertOnDuplicate(
-        $table,
-        [
-            'scope'     => $config['scope'],
-            'scope_id'  => $config['scope_id'],
-            'path'      => Mage_Core_Helper_Data::XML_PATH_DEV_LOG_MAX_LEVEL,
-            'value'     => $monologValue,
-        ],
-        ['value'],
-    );
-}
-
-$installer->endSetup();
diff --git a/tests/unit/Mage/Core/Helper/LogTest.php b/tests/unit/Mage/Core/Helper/LogTest.php
new file mode 100644
index 00000000000..1955fb34973
--- /dev/null
+++ b/tests/unit/Mage/Core/Helper/LogTest.php
@@ -0,0 +1,90 @@
+<?php
+
+/**
+ * @copyright  For copyright and license information, read the COPYING.txt file.
+ * @link       /COPYING.txt
+ * @license    Open Software License (OSL 3.0)
+ * @package    OpenMage_Tests
+ */
+
+declare(strict_types=1);
+
+namespace OpenMage\Tests\Unit\Mage\Core\Helper;
+
+use Mage;
+use Mage_Core_Helper_Log as Subject;
+use Monolog\Formatter\LineFormatter;
+use Monolog\Handler\StreamHandler;
+use Monolog\Level;
+use OpenMage\Tests\Unit\OpenMageTest;
+use OpenMage\Tests\Unit\Traits\DataProvider\Mage\Core\Helper\LogTrait;
+
+final class LogTest extends OpenMageTest
+{
+    use LogTrait;
+
+    // @phpstan-ignore property.onlyWritten
+    private static Subject $subject;
+
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+        self::$subject = Mage::helper('core/log');
+    }
+
+    /**
+     * @dataProvider provideGetLogLevelData
+     * @covers Mage_Core_Helper_Log::getLogLevelMaxValue()
+     * @covers Mage_Core_Helper_Log::getLogLevelValue()
+     * @group Helper
+     */
+    public function testGetLogLevelValue(int $expectedResult, null|int|Level|string $level): void
+    {
+        self::assertSame($expectedResult, Subject::getLogLevelValue($level));
+    }
+
+    /**
+     * @covers Mage_Core_Helper_Log::getConfigAllowedFileExtensions()
+     * @group Helper
+     */
+    public function testGetConfigAlowedFileExtensions(): void
+    {
+        self::assertIsArray(Subject::getConfigAllowedFileExtensions());
+    }
+
+    /**
+     * @covers Mage_Core_Helper_Log::getConfigLogFile()
+     * @group Helper
+     */
+    public function testGetConfigLogFile(): void
+    {
+        self::assertIsString(Subject::getConfigLogFile());
+    }
+
+    /**
+     * @covers Mage_Core_Helper_Log::getHandler()
+     * @group Helper
+     */
+    public function testGetHandler(): void
+    {
+        self::assertInstanceOf(StreamHandler::class, Subject::getHandler('somefile.log'));
+    }
+
+    /**
+     * @covers Mage_Core_Helper_Log::getLineFormatter()
+     * @group Helper
+     */
+    public function testGetLineFormatter(): void
+    {
+        self::assertInstanceOf(LineFormatter::class, Subject::getLineFormatter());
+    }
+
+    /**
+     * @covers Mage_Core_Helper_Log::getLogLevelMax()
+     * @group Helper
+     */
+    public function testGetLogLevelMaxValue(): void
+    {
+        self::assertIsInt(Subject::getLogLevelMaxValue());
+    }
+}
diff --git a/tests/unit/Traits/DataProvider/Mage/Core/Helper/LogTrait.php b/tests/unit/Traits/DataProvider/Mage/Core/Helper/LogTrait.php
new file mode 100644
index 00000000000..cc0678745fe
--- /dev/null
+++ b/tests/unit/Traits/DataProvider/Mage/Core/Helper/LogTrait.php
@@ -0,0 +1,69 @@
+<?php
+
+/**
+ * @copyright  For copyright and license information, read the COPYING.txt file.
+ * @link       /COPYING.txt
+ * @license    Open Software License (OSL 3.0)
+ */
+
+declare(strict_types=1);
+
+namespace OpenMage\Tests\Unit\Traits\DataProvider\Mage\Core\Helper;
+
+use Generator;
+use Monolog\Level;
+
+trait LogTrait
+{
+    public function provideGetLogLevelData(): Generator
+    {
+        yield 'null' => [
+            Level::Debug->toRFC5424Level(),
+            null,
+        ];
+        yield 'empty string' => [
+            Level::Debug->toRFC5424Level(),
+            '',
+        ];
+        yield 'invalid string' => [
+            Level::Debug->toRFC5424Level(),
+            'abc',
+        ];
+        yield 'string psr3' => [
+            Level::Info->toRFC5424Level(),
+            'info',
+        ];
+        yield 'numeric string 0' => [
+            Level::Emergency->toRFC5424Level(),
+            '0',
+        ];
+        yield 'numeric string 200' => [
+            Level::Info->toRFC5424Level(),
+            '200',
+        ];
+        yield 'numeric string 999' => [
+            Level::Debug->toRFC5424Level(),
+            '999',
+        ];
+        yield 'int 0' => [
+            Level::Emergency->toRFC5424Level(),
+            0,
+        ];
+        yield 'int 66' => [
+            Level::Debug->toRFC5424Level(),
+            66,
+        ];
+        yield 'int 200' => [
+            Level::Info->toRFC5424Level(),
+            200,
+        ];
+        yield 'int 999' => [
+            Level::Debug->toRFC5424Level(),
+            999,
+        ];
+        yield 'monolog level' => [
+            Level::Debug->toRFC5424Level(),
+            Level::Debug,
+        ];
+    }
+}