diff --git a/composer.json b/composer.json
index 2161fef..0284696 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,7 @@
         "test": "./vendor/bin/phpunit tests",
         "lint": "./vendor/bin/pint",
         "inspect": "./vendor/bin/pint --test",
-        "apidoc": "doctum.phar update doctum.php --output-format=github --no-ansi --no-progress",
+        "apidoc": "rm -rf build; rm -rf cache; doctum.phar update doctum.php --output-format=github --no-ansi --no-progress -v;",
         "opendoc": "open build/index.html"
     }
 }
\ No newline at end of file
diff --git a/doctum.php b/doctum.php
index 23f878b..2e64daa 100644
--- a/doctum.php
+++ b/doctum.php
@@ -8,8 +8,7 @@
 $iterator = Finder::create()
     ->files()
     ->name('*.php')
-    ->exclude('Resources')
-    ->exclude('Tests')
+    ->exclude('tests')
     ->in($dir);
 
 return new Doctum($iterator, [
diff --git a/src/GoodCode.php b/src/GoodCode.php
index 00643dc..f63f4ee 100644
--- a/src/GoodCode.php
+++ b/src/GoodCode.php
@@ -7,12 +7,18 @@
 use Cable8mm\GoodCode\ValueObjects\SetGood;
 
 /**
- * Make set code, option code and so on.
+ * Class GoodCode
+ *
+ * This class makes a set code, option code and so on.
+ *
+ * @author Samgu Lee <cable8mm@gmail.com>
+ *
+ * @since  2025-02-04
  */
 class GoodCode
 {
     /**
-     * @var GoodCodeType The type of the code
+     * The type of the code
      */
     private GoodCodeType $type;
 
diff --git a/src/Location.php b/src/Location.php
index c59cbcb..d724636 100644
--- a/src/Location.php
+++ b/src/Location.php
@@ -4,6 +4,15 @@
 
 use Stringable;
 
+/**
+ * Class Location
+ *
+ * This class represents a warehouse location identified by warehouse, rack, and shelf. The location code is generated from these properties.
+ *
+ * @author Samgu Lee <cable8mm@gmail.com>
+ *
+ * @since  2025-02-24
+ */
 class Location implements Stringable
 {
     /**
@@ -53,6 +62,13 @@ private function __construct(
         $this->locationCode = preg_replace('/-+/', '-', $this->locationCode);
     }
 
+    /**
+     * Get the location code.
+     *
+     * @return string The method returns the location code
+     *
+     * @example print Location::of(warehouse: 'AUK', rack: 'R3', shelf: 'S32')->locationCode();
+     */
     public function locationCode(): string
     {
         return $this->locationCode;
@@ -98,6 +114,14 @@ public static function of(
         );
     }
 
+    /**
+     * Get the string representation of the location.
+     *
+     * @return string The magic method returns the location code
+     *
+     * @example print Location::of(warehouse: 'A1') => 'A1'
+     * @example print Location::of(warehouse: 'A1', rack: 'B3') => 'A1-B3'
+     */
     public function __toString(): string
     {
         return $this->locationCode;
diff --git a/src/ReceiptCode.php b/src/ReceiptCode.php
index b3a9913..58c6e67 100644
--- a/src/ReceiptCode.php
+++ b/src/ReceiptCode.php
@@ -5,6 +5,15 @@
 use InvalidArgumentException;
 use Stringable;
 
+/**
+ * Class ReceiptCode
+ *
+ * This class represents a receipt code identified by code, prefix, ymd and number. The receipt code is generated from these properties.
+ *
+ * @author Samgu Lee <cable8mm@gmail.com>
+ *
+ * @since  2025-02-21
+ */
 class ReceiptCode implements Stringable
 {
     /**
diff --git a/src/ValueObjects/SetGood.php b/src/ValueObjects/SetGood.php
index fc6748c..0f33fb5 100644
--- a/src/ValueObjects/SetGood.php
+++ b/src/ValueObjects/SetGood.php
@@ -6,6 +6,15 @@
 use InvalidArgumentException;
 use Stringable;
 
+/**
+ * Class SetGood
+ *
+ * This class is a value object for SetGood object.
+ *
+ * @author Samgu Lee <cable8mm@gmail.com>
+ *
+ * @since  2025-02-04
+ */
 class SetGood implements Stringable
 {
     /**