diff --git a/admin/class-settings.php b/admin/class-settings.php
index 8ec9afb..840a7e9 100644
--- a/admin/class-settings.php
+++ b/admin/class-settings.php
@@ -2,6 +2,10 @@
 
 namespace PluginNamespace\Admin;
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
 class Settings {
 
 	/**
@@ -26,11 +30,11 @@ class Settings {
 	 */
 	public function append_to_admin_menu(): void {
 		$parent_slug = 'nmsp-plugin-name-menu-slug';
-		$page_title = __( 'Namespace Plugin Name - Settings', 'nmsp_plugin_name_settings_title' );
-		$menu_title = __( 'Settings', 'nmsp_plugin_name_settings_title' );
-		$capability = 'manage_options';
-		$menu_slug = $parent_slug;
-		$callback = array( $this, 'show_main_settings_page' );
+		$page_title  = __( 'Namespace Plugin Name - Settings', 'nmsp_plugin_name_settings_title' );
+		$menu_title  = __( 'Settings', 'nmsp_plugin_name_settings_title' );
+		$capability  = 'manage_options';
+		$menu_slug   = $parent_slug;
+		$callback    = array( $this, 'show_main_settings_page' );
 
 		add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $callback );
 	}
@@ -45,7 +49,7 @@ class Settings {
 	public function show_main_settings_page(): string {
 		$data = array();
 
-		$this->localize_script();
+		$this->localize_script( array() );
 
 		ob_start();
 		echo nmsp_plugin_app()->blade->run( 'admin.settings', $data );
@@ -78,9 +82,12 @@ class Settings {
 	private function localize_script( array $additional_data = array() ): void {
 		wp_enqueue_script( 'nmsp-plugin-name-admin-js' );
 
-		$payload = array(
-			'wp_ajax_url' => admin_url( 'admin-ajax.php' ),
-			'_nonce'      => wp_create_nonce( NMSP_PLUGIN_NONCE ),
+		$payload = array_merge(
+			$additional_data,
+			array(
+				'wp_ajax_url' => admin_url( 'admin-ajax.php' ),
+				'_nonce'      => wp_create_nonce( NMSP_PLUGIN_NONCE ),
+			)
 		);
 		wp_localize_script( 'nmsp-plugin-name-admin-js', 'nmspPluginAdminApi', $payload );
 	}
diff --git a/bootstrap.php b/bootstrap.php
index 322f9a8..2dda9d8 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -1,5 +1,9 @@
 <?php
 
+if ( ! defined( 'ABSPATH' ) ) {
+    exit;
+}
+
 /**
  | ----------------------------------------------------------------
  | Bootstrap
diff --git a/constants/base.php b/constants/base.php
index 3a792d0..de88e6f 100644
--- a/constants/base.php
+++ b/constants/base.php
@@ -1,5 +1,9 @@
 <?php
 
+if ( ! defined( 'ABSPATH' ) ) {
+    exit;
+}
+
 /**
  | ----------------------------------------------------------------
  | Base Definitions
diff --git a/constants/http-codes.php b/constants/http-codes.php
index 1684076..9732b30 100644
--- a/constants/http-codes.php
+++ b/constants/http-codes.php
@@ -1,5 +1,9 @@
 <?php
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
 /**
  | ----------------------------------------------------------------
  | HTTP Status Code Definitions
diff --git a/constants/rewrites.php b/constants/rewrites.php
index deaddc2..f03e308 100644
--- a/constants/rewrites.php
+++ b/constants/rewrites.php
@@ -1,5 +1,9 @@
 <?php
 
+if ( ! defined( 'ABSPATH' ) ) {
+    exit;
+}
+
 /**
  | ----------------------------------------------------------------
  | URL Rewrite Definitions
diff --git a/includes/class-app.php b/includes/class-app.php
index 5227a84..03d1802 100644
--- a/includes/class-app.php
+++ b/includes/class-app.php
@@ -5,6 +5,10 @@ namespace PluginNamespace;
 use eftec\bladeone\BladeOne;
 use Exception;
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
 class App {
 
 	/** @var \PluginNamespace\App */
diff --git a/includes/class-nmspcli.php b/includes/class-nmspcli.php
index 5e731bc..0d6416c 100644
--- a/includes/class-nmspcli.php
+++ b/includes/class-nmspcli.php
@@ -5,7 +5,7 @@ namespace PluginNamespace;
 use WP_CLI;
 
 if ( ! defined( 'ABSPATH' ) ) {
-	exit; // Exit if accessed directly
+	exit;
 }
 
 class NmspCli {
diff --git a/includes/front/class-custompage.php b/includes/front/class-custompage.php
index 9eb6e9f..d2969e4 100644
--- a/includes/front/class-custompage.php
+++ b/includes/front/class-custompage.php
@@ -2,6 +2,10 @@
 
 namespace PluginNamespace\Front;
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
 class CustomPage {
 
 	/**
diff --git a/includes/front/class-rewrites.php b/includes/front/class-rewrites.php
index 8b7c4f3..0f97229 100644
--- a/includes/front/class-rewrites.php
+++ b/includes/front/class-rewrites.php
@@ -2,6 +2,10 @@
 
 namespace PluginNamespace\Front;
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
 class Rewrites {
 
 	/**
diff --git a/nmsp-plugin-name.php b/nmsp-plugin-name.php
index 182ebef..e2033b3 100644
--- a/nmsp-plugin-name.php
+++ b/nmsp-plugin-name.php
@@ -3,16 +3,16 @@
 /**
  * Boilerplate Plugin
  *
- * @package BoilerplatePlugin
- * @author
- * @copyright
- * @license
+ * @package           BoilerplatePlugin
+ * @author            Plugin Author
+ * @copyright         GPL v2
+ * @license           https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
  * 
  * @wordpress-plugin
  * Plugin Name:       Boilerplate Plugin
  * Description:       Your plugin description.
  * License:           GPL v2
- * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
+ * License URI:       https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
  * Plugin URI:        https://domain.com
  * Update URI:        https://example.com/my-plugin/
  * Version:           1.0.0
@@ -21,12 +21,21 @@
  * Author:            Plugin Author
  * Author URI:        https://plugin-author.com
  * Text Domain:       nmsp-plugin-name-text-domain
+ * Domain Path:       /languages
  */
 
+// If this file is called directly, abort.
 if ( ! defined( 'ABSPATH' ) ) {
-	exit; // Exit if accessed directly
+	exit;
 }
 
+/**
+ * Currently plugin version.
+ * Start at version 1.0.0 and use SemVer - https://semver.org
+ * Rename this for your plugin and update it as you release new versions.
+ */
+define( 'PLUGIN_NAME_VERSION', '1.0.0' );
+
 define( 'NMSP_PLUGIN_BASE_DIR', __DIR__ );
 
 require_once __DIR__ . '/vendor/autoload.php';
diff --git a/uninstall.php b/uninstall.php
index 894fdf1..f117710 100644
--- a/uninstall.php
+++ b/uninstall.php
@@ -1,12 +1,11 @@
 <?php
 
 if ( ! defined( 'ABSPATH' ) ) {
-	// Exit if accessed directly
 	exit;
 }
 
+// This constant gets set when WordPress' uninstall.php file is invoked.
 if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
-	// This constant gets set when WordPress' uninstall.php file is invoked.
 	exit;
 }