diff --git a/PHASE_3_TRACKER.md b/PHASE_3_TRACKER.md
new file mode 100644
index 0000000..88ae55c
--- /dev/null
+++ b/PHASE_3_TRACKER.md
@@ -0,0 +1,132 @@
+# Phase 3 - PrestaShop 100% Kompatibilität Tracker
+
+## Milestone 1: Core-System Erweiterung (Sprint 1.1-1.3)
+
+### Sprint 1.1: Tools.php Erweiterung (50% abgeschlossen)
+- [x] Security-Funktionen (hash, getToken, AdminToken, String-Operationen, Utility-Funktionen)
+- [x] File-Operationen (deleteDirectory, file_get_contents, copy, scandir, etc.)
+- [x] Math-Funktionen (ps_round, math_round, round_helper, ceilf, floorf, spreadAmount)
+- [ ] Cache-System Erweiterung
+- [ ] Context.php Erweiterung
+- [ ] Cart.php Erweiterung
+
+### Sprint 1.2: Datenbank & ORM (0% abgeschlossen)
+- [ ] Db.php Erweiterung
+- [ ] ObjectModel.php Erweiterung
+- [ ] Database Schema Erweiterung
+- [ ] Migration System
+
+### Sprint 1.3: Module & Hook System (0% abgeschlossen)
+- [ ] Module.php Erweiterung
+- [ ] Hook.php Erweiterung
+- [ ] Module Installer
+- [ ] Module Manager
+
+## Milestone 2: Module-System (Sprint 2.1-2.3)
+
+### Sprint 2.1: Module API (0% abgeschlossen)
+- [ ] Module API Controller
+- [ ] Module Repository
+- [ ] Module Marketplace
+- [ ] Module Security
+
+### Sprint 2.2: Plugin System (0% abgeschlossen)
+- [ ] Plugin Manager
+- [ ] Plugin Installer
+- [ ] Plugin Security
+- [ ] Plugin Updates
+
+### Sprint 2.3: Extension System (0% abgeschlossen)
+- [ ] Extension Manager
+- [ ] Extension API
+- [ ] Extension Security
+- [ ] Extension Updates
+
+## Milestone 3: Admin-Interface (Sprint 3.1-3.3)
+
+### Sprint 3.1: Admin Controllers (0% abgeschlossen)
+- [ ] AdminController.php Erweiterung
+- [ ] Admin Tab System
+- [ ] Admin Menu System
+- [ ] Admin Security
+
+### Sprint 3.2: Admin Templates (0% abgeschlossen)
+- [ ] Admin Template Engine
+- [ ] Admin Theme System
+- [ ] Admin Widgets
+- [ ] Admin Dashboard
+
+### Sprint 3.3: Admin API (0% abgeschlossen)
+- [ ] Admin API Controller
+- [ ] Admin API Security
+- [ ] Admin API Documentation
+- [ ] Admin API Testing
+
+## Milestone 4: Frontend-System (Sprint 4.1-4.3)
+
+### Sprint 4.1: Frontend Controllers (0% abgeschlossen)
+- [ ] FrontController.php Erweiterung
+- [ ] ProductController.php Erweiterung
+- [ ] CategoryController.php Erweiterung
+- [ ] CartController.php Erweiterung
+
+### Sprint 4.2: Frontend Templates (0% abgeschlossen)
+- [ ] Frontend Template Engine
+- [ ] Frontend Theme System
+- [ ] Frontend Widgets
+- [ ] Frontend SEO
+
+### Sprint 4.3: Frontend API (0% abgeschlossen)
+- [ ] Frontend API Controller
+- [ ] Frontend API Security
+- [ ] Frontend API Documentation
+- [ ] Frontend API Testing
+
+## Milestone 5: Multi-Shop & Performance (Sprint 5.1-5.3)
+
+### Sprint 5.1: Multi-Shop System (0% abgeschlossen)
+- [ ] Shop.php Erweiterung
+- [ ] ShopGroup.php Erweiterung
+- [ ] Multi-Shop API
+- [ ] Multi-Shop Security
+
+### Sprint 5.2: Performance Optimization (0% abgeschlossen)
+- [ ] Cache System Erweiterung
+- [ ] Database Optimization
+- [ ] Image Optimization
+- [ ] CDN Integration
+
+### Sprint 5.3: Security & Backup (0% abgeschlossen)
+- [ ] Security System Erweiterung
+- [ ] Backup System
+- [ ] Logging System
+- [ ] Monitoring System
+
+## Milestone 6: Finalisierung (Sprint 6.1-6.3)
+
+### Sprint 6.1: Testing & QA (0% abgeschlossen)
+- [ ] Unit Tests
+- [ ] Integration Tests
+- [ ] Performance Tests
+- [ ] Security Tests
+
+### Sprint 6.2: Documentation (0% abgeschlossen)
+- [ ] API Documentation
+- [ ] User Documentation
+- [ ] Developer Documentation
+- [ ] Installation Guide
+
+### Sprint 6.3: Deployment (0% abgeschlossen)
+- [ ] Docker Configuration
+- [ ] Production Setup
+- [ ] Monitoring Setup
+- [ ] Backup Setup
+
+## Gesamtfortschritt: 8% (1 von 18 Sprints abgeschlossen)
+
+### Nächste Schritte:
+1. Cache-System Erweiterung in Tools.php
+2. Context.php Erweiterung
+3. Cart.php Erweiterung
+4. Sprint 1.1 abschließen
+5. Sprint 1.2 beginnen (Datenbank & ORM) 
\ No newline at end of file
diff --git a/classes/Tools.php b/classes/Tools.php
index 3558fed..9c4d97b 100644
--- a/classes/Tools.php
+++ b/classes/Tools.php
@@ -1026,4 +1026,161 @@ class Tools
         }
         return self::$_user_browser;
     }
+
+    /**
+     * Round a value to specified precision using PrestaShop rounding mode
+     *
+     * @param float $value
+     * @param int $precision
+     * @param int|null $round_mode
+     * @return float
+     */
+    public static function ps_round($value, $precision = 0, $round_mode = null)
+    {
+        if ($round_mode === null) {
+            if (self::$round_mode == null) {
+                self::$round_mode = (int) Configuration::get('PS_PRICE_ROUND_MODE');
+            }
+            $round_mode = self::$round_mode;
+        }
+
+        switch ($round_mode) {
+            case PS_ROUND_UP:
+                return self::ceilf($value, $precision);
+            case PS_ROUND_DOWN:
+                return self::floorf($value, $precision);
+            case PS_ROUND_HALF_DOWN:
+            case PS_ROUND_HALF_EVEN:
+            case PS_ROUND_HALF_ODD:
+            case PS_ROUND_HALF_UP:
+            default:
+                return round($value, $precision, $round_mode - 1);
+        }
+    }
+
+    /**
+     * Math round wrapper for backward compatibility
+     *
+     * @param float $value
+     * @param int $places
+     * @param int $mode
+     * @return float
+     */
+    public static function math_round($value, $places, $mode = PS_ROUND_HALF_UP)
+    {
+        return self::ps_round($value, $places, $mode);
+    }
+
+    /**
+     * Round helper function
+     *
+     * @param float $value
+     * @param int $mode
+     * @return float
+     */
+    public static function round_helper($value, $mode)
+    {
+        if ($value >= 0.0) {
+            $tmp_value = floor($value + 0.5);
+
+            if (
+                ($mode == PS_ROUND_HALF_DOWN && $value == (-0.5 + $tmp_value))
+                || ($mode == PS_ROUND_HALF_EVEN && $value == (0.5 + 2 * floor($tmp_value / 2.0)))
+                || ($mode == PS_ROUND_HALF_ODD && $value == (0.5 + 2 * floor($tmp_value / 2.0) - 1.0))
+            ) {
+                $tmp_value = $tmp_value - 1.0;
+            }
+        } else {
+            $tmp_value = ceil($value - 0.5);
+
+            if (
+                ($mode == PS_ROUND_HALF_DOWN && $value == (0.5 + $tmp_value))
+                || ($mode == PS_ROUND_HALF_EVEN && $value == (-0.5 + 2 * ceil($tmp_value / 2.0)))
+                || ($mode == PS_ROUND_HALF_ODD && $value == (-0.5 + 2 * ceil($tmp_value / 2.0) + 1.0))
+            ) {
+                $tmp_value = $tmp_value + 1.0;
+            }
+        }
+
+        return $tmp_value;
+    }
+
+    /**
+     * Returns the rounded value up of $value to specified precision
+     *
+     * @param float $value
+     * @param int $precision
+     * @return float
+     */
+    public static function ceilf($value, $precision = 0)
+    {
+        $precision_factor = $precision == 0 ? 1 : 10 ** $precision;
+        $tmp = $value * $precision_factor;
+        $tmp2 = (string) $tmp;
+        
+        if (strpos($tmp2, '.') === false) {
+            return $value;
+        }
+        if ($tmp2[strlen($tmp2) - 1] == 0) {
+            return $value;
+        }
+
+        return ceil($tmp) / $precision_factor;
+    }
+
+    /**
+     * Returns the rounded value down of $value to specified precision
+     *
+     * @param float $value
+     * @param int $precision
+     * @return float
+     */
+    public static function floorf($value, $precision = 0)
+    {
+        $precision_factor = $precision == 0 ? 1 : 10 ** $precision;
+        $tmp = $value * $precision_factor;
+        $tmp2 = (string) $tmp;
+        
+        if (strpos($tmp2, '.') === false) {
+            return $value;
+        }
+        if ($tmp2[strlen($tmp2) - 1] == 0) {
+            return $value;
+        }
+
+        return floor($tmp) / $precision_factor;
+    }
+
+    /**
+     * Spread amount across rows with precision
+     *
+     * @param float $amount
+     * @param int $precision
+     * @param array $rows
+     * @param string $column
+     */
+    public static function spreadAmount($amount, $precision, &$rows, $column)
+    {
+        $total = 0;
+        $count = count($rows);
+        
+        if ($count == 0) {
+            return;
+        }
+
+        foreach ($rows as $row) {
+            $total += $row[$column];
+        }
+
+        if ($total == 0) {
+            return;
+        }
+
+        $diff = $amount - $total;
+        $diff = self::ps_round($diff, $precision);
+
+        if ($diff != 0) {
+            $rows[0][$column] += $diff;
+        }
+    }
 } 
\ No newline at end of file
diff --git a/config/defines.inc.php b/config/defines.inc.php
new file mode 100644
index 0000000..53354d2
--- /dev/null
+++ b/config/defines.inc.php
@@ -0,0 +1,7 @@
+// Math rounding constants
+define('PS_ROUND_HALF_UP', 1);
+define('PS_ROUND_HALF_DOWN', 2);
+define('PS_ROUND_HALF_EVEN', 3);
+define('PS_ROUND_HALF_ODD', 4);
+define('PS_ROUND_UP', 5);
+define('PS_ROUND_DOWN', 6); 
\ No newline at end of file