diff --git a/src/AntCMS/AntCMS.php b/src/AntCMS/AntCMS.php
index 9a7cf9b..c8da6ec 100644
--- a/src/AntCMS/AntCMS.php
+++ b/src/AntCMS/AntCMS.php
@@ -21,7 +21,7 @@ public function renderPage(?string $page = null): string
             $this->renderException("404");
         }
 
-        HookController::fire('contentHit', ['contentUri' => $page]);
+        HookController::fire('onAfterContentHit', ['contentUri' => $page]);
 
         $themeConfig = self::getThemeConfig();
         $params = [
diff --git a/src/AntCMS/AntYaml.php b/src/AntCMS/AntYaml.php
index a94adf4..00e8643 100644
--- a/src/AntCMS/AntYaml.php
+++ b/src/AntCMS/AntYaml.php
@@ -45,7 +45,7 @@ public static function saveFile(string $path, array $data): bool
     }
 
     /**
-     * Parses a string containing YAML data and returns the content as an array. 
+     * Parses a string containing YAML data and returns the content as an array.
      * @return mixed[]
      */
     public static function parseYaml(string $yaml): array
diff --git a/src/AntCMS/ApiController.php b/src/AntCMS/ApiController.php
index 4a0e16e..0e37118 100644
--- a/src/AntCMS/ApiController.php
+++ b/src/AntCMS/ApiController.php
@@ -35,7 +35,7 @@ private function getApiCallData(string $plugin, string $method): array
     {
         // Some needed variable setup
         $url = rtrim(Flight::request()->url, '/');
-        if($_GET !== []) {
+        if ($_GET !== []) {
             $query = '?' . http_build_query($_GET);
             $url = str_replace($query, '', $url);
         }
@@ -91,7 +91,7 @@ private function call(string $type, string $plugin, string $method): void
         }
 
         $hookData = ['plugin' => ucfirst($plugin), 'method' => $method];
-        HookController::fire('beforeApiCalled', $hookData);
+        HookController::fire('onBeforeApiCalled', $hookData);
 
         // Sanity checks passed, now actually process the request
         try {
@@ -108,7 +108,7 @@ private function call(string $type, string $plugin, string $method): void
         }
 
         $hookData['response'] = $response;
-        HookController::fire('afterApiCalled', $hookData);
+        HookController::fire('onAfterApiCalled', $hookData);
 
         $this->sendResponse($response);
     }
diff --git a/src/AntCMS/ApiResponse.php b/src/AntCMS/ApiResponse.php
index b664f1a..b305fca 100644
--- a/src/AntCMS/ApiResponse.php
+++ b/src/AntCMS/ApiResponse.php
@@ -4,7 +4,7 @@
 
 class ApiResponse
 {
-    public function __construct(private mixed $result, private readonly bool $error = false, private readonly int $code = 200, private string $message = '')
+    public function __construct(private readonly mixed $result, private readonly bool $error = false, private readonly int $code = 200, private readonly string $message = '')
     {
     }
 
diff --git a/src/AntCMS/Cache.php b/src/AntCMS/Cache.php
index 7b67af0..12ed124 100644
--- a/src/AntCMS/Cache.php
+++ b/src/AntCMS/Cache.php
@@ -18,9 +18,9 @@ class Cache
 
     /**
      * Configures the cache system by selecting and prioritizing specific cache adapters.
-     * 
+     *
      * The `$allowed` array specifies which cache types to enable. Available options are 'apcu', 'php_file', and 'filesystem'.
-     *  
+     *
      * @param string[] $allowed An array of allowed cache adapter names.
      */
     public static function setup(array $allowed = []): void
@@ -49,13 +49,13 @@ public static function setup(array $allowed = []): void
 
     /**
      * Retrieves a value from the cache.
-     * 
+     *
      * If the value is not found in the cache, it executes the provided callable and stores the result for future retrieval.
-     * 
+     *
      * @param string $key The unique identifier for the cached value.
      * @param callable|CallbackInterface $callable A function that returns the value to be cached.
      * @param ?float $beta (Optional) Controls the cache update strategy. See Symfony documentation for details.
-     * @param ?mixed[] &$metadata (Optional) Stores metadata about the cached item. 
+     * @param ?mixed[] &$metadata (Optional) Stores metadata about the cached item.
      * @return mixed The cached value or the result of the callable if it's not found.
      */
     public static function get(string $key, callable|CallbackInterface $callable, ?float $beta = null, ?array &$metadata = []): mixed
@@ -65,7 +65,7 @@ public static function get(string $key, callable|CallbackInterface $callable, ?f
 
     /**
      * Prunes the cache. This removes stale entries that are no longer needed.
-     * 
+     *
      * @return bool True if any items were pruned, false otherwise.
      */
     public static function prune(): bool
diff --git a/src/AntCMS/Event.php b/src/AntCMS/Event.php
index d0a89f3..21a516f 100644
--- a/src/AntCMS/Event.php
+++ b/src/AntCMS/Event.php
@@ -14,13 +14,14 @@ class Event
     private int $paramUpdateCount = 0;
     private int $paramReadCount = 0;
     private int $lastCallback = 0;
+    private bool $defaultPrevented = false;
 
     /**
      * @param string $associatedHook The hook that this event is associated with. Hook must exist.
      *
      * @param mixed[] $parameters
      */
-    public function __construct(string $associatedHook, private array $parameters, private readonly int $totalCallbacks)
+    public function __construct(string $associatedHook, private array $parameters, private readonly int $totalCallbacks, private readonly bool $preventable)
     {
         if (!HookController::isRegistered($associatedHook)) {
             throw new \Exception("Hook $associatedHook is not registered!");
@@ -127,7 +128,7 @@ public function setParameters(array $parameters): Event
     }
 
     /**
-     * Returns the number of times the event parameters were read from
+     * Returns the number of times the event parameters were read from.
      */
     public function getReadCount(): int
     {
@@ -141,4 +142,37 @@ public function getUpdateCount(): int
     {
         return $this->paramUpdateCount;
     }
+
+    /**
+     * Indicates if the default behavior for an event is preventable.
+     */
+    public function isDefaultPreventable(): bool
+    {
+        return $this->preventable;
+    }
+
+    /**
+     * Indicates if the default behavior for an event is prevented.
+     */
+    public function isDefaultPrevented(): bool
+    {
+        return $this->defaultPrevented;
+    }
+
+    /**
+     * Sets a flag for the default behavior of this event to be prevented.
+     * Not all events can be prevented. Triggers a non-fatal error if the event's default behavior is not preventable.
+     *
+     * @return Event
+     */
+    public function preventDefault(): Event
+    {
+        if (!$this->isDefaultPreventable()) {
+            trigger_error("The default behavior for the `$this->associatedHook` hook cannot be prevented.");
+        } else {
+            $this->defaultPrevented = true;
+        }
+
+        return $this;
+    }
 }
diff --git a/src/AntCMS/Hook.php b/src/AntCMS/Hook.php
index d3a6253..c0e811a 100644
--- a/src/AntCMS/Hook.php
+++ b/src/AntCMS/Hook.php
@@ -20,8 +20,9 @@ class Hook
      *
      * @param string $name The name of the hook
      * @param string $description A description of this hook
+     * @param bool $isDefaultPreventable Marks if the default behavior for a hook can be prevented.
      */
-    public function __construct(string $name, public string $description)
+    public function __construct(string $name, public string $description, private readonly bool $isDefaultPreventable = false)
     {
         if (preg_match('/^\w+$/', $name) === 0 || preg_match('/^\w+$/', $name) === false) {
             throw new \Exception("The hook name '$name' is invalid. Only a-z A-Z, 0-9, and _ are allowed to be in the hook name.");
@@ -40,7 +41,7 @@ public function fire(array $params): Event
         $this->timesFired++;
 
         // Create the new event object with the originally provided parameters
-        $event = new Event($this->name, $params, $this->registeredCallbacks);
+        $event = new Event($this->name, $params, $this->registeredCallbacks, $this->isDefaultPreventable);
 
         // Then fire each of the callbacks and update the event instance from each one.
         foreach ($this->callbacks as $callback) {
diff --git a/src/AntCMS/HookController.php b/src/AntCMS/HookController.php
index 4d7053b..7e1895e 100644
--- a/src/AntCMS/HookController.php
+++ b/src/AntCMS/HookController.php
@@ -20,7 +20,7 @@ public static function isRegistered(string $name): bool
         return array_key_exists($name, self::$hooks);
     }
 
-    public static function registerHook(string $name, string $description = ''): bool
+    public static function registerHook(string $name, string $description = '', bool $isDefaultPreventable = false): bool
     {
         if (self::isRegistered($name)) {
             if ($description !== '') {
@@ -29,7 +29,7 @@ public static function registerHook(string $name, string $description = ''): boo
             return true;
         }
 
-        self::$hooks[$name] = new Hook($name, $description);
+        self::$hooks[$name] = new Hook($name, $description, $isDefaultPreventable);
         return true;
     }
 
@@ -42,9 +42,9 @@ public static function registerCallback(string $name, callable $callback): void
     }
 
     /**
-     * @param mixed[] $params
+     * @param mixed[] $params (Optional)
      */
-    public static function fire(string $name, array $params): Event
+    public static function fire(string $name, array $params = []): Event
     {
         if (self::isRegistered($name)) {
             return self::$hooks[$name]->fire($params);
diff --git a/src/AntCMS/Pages.php b/src/AntCMS/Pages.php
index 026b18d..e4ef6fe 100644
--- a/src/AntCMS/Pages.php
+++ b/src/AntCMS/Pages.php
@@ -109,10 +109,10 @@ private static function buildList(string $path = PATH_CONTENT): array
             if (isset($directoryMeta['pageOrder'][$a]) && isset($directoryMeta['pageOrder'][$b])) {
                 return $directoryMeta['pageOrder'][$a] > $directoryMeta['pageOrder'][$b] ? 1 : -1;
             }
-            if(isset($directoryMeta['pageOrder'][$a]) && !isset($directoryMeta['pageOrder'][$b])) {
+            if (isset($directoryMeta['pageOrder'][$a]) && !isset($directoryMeta['pageOrder'][$b])) {
                 return -1;
             }
-            if(!isset($directoryMeta['pageOrder'][$a]) && isset($directoryMeta['pageOrder'][$b])) {
+            if (!isset($directoryMeta['pageOrder'][$a]) && isset($directoryMeta['pageOrder'][$b])) {
                 return 1;
             }
             // Ensure index items come first
diff --git a/src/AntCMS/PluginController.php b/src/AntCMS/PluginController.php
index c92f0e1..9a90da9 100644
--- a/src/AntCMS/PluginController.php
+++ b/src/AntCMS/PluginController.php
@@ -50,6 +50,8 @@ public static function init(): void
                 Twig::addLoaderPath($templateDir);
             }
         }
+
+        HookController::fire('onAfterPluginsInit');
     }
 
     /**
diff --git a/src/AntCMS/Tools.php b/src/AntCMS/Tools.php
index 66ccfcf..89f86ec 100644
--- a/src/AntCMS/Tools.php
+++ b/src/AntCMS/Tools.php
@@ -2,6 +2,7 @@
 
 namespace AntCMS;
 
+use Flight;
 use HostByBelle\CompressionBuffer;
 use Symfony\Contracts\Cache\ItemInterface;
 
@@ -257,7 +258,7 @@ public static function getPerformanceMetrics(): array
         ];
     }
 
-    private static function createDebugLogLine(string $wording, bool|string $value): string
+    private static function createDebugLogLine(string $wording, bool|string|int $value): string
     {
         if (is_bool($value)) {
             $value = $value ? "enabled" : "disabled";
@@ -291,6 +292,7 @@ public static function buildDebugInfo(): string
                 $result .= self::createDebugLogLine('This page was compressed with', $method);
             }
 
+            $result .= self::createDebugLogLine('Page output size', Flight::response()->getContentLength());
             $result .= self::createDebugLogLine('Asset compression', COMPRESS_TEXT_ASSETS);
             $result .= self::createDebugLogLine('Image compression', COMPRESS_IMAGES);
             $result .= self::createDebugLogLine('PHP version', PHP_VERSION);
diff --git a/src/Plugins/Robotstxt/Controller.php b/src/Plugins/Robotstxt/Controller.php
index 7f95986..9a17584 100644
--- a/src/Plugins/Robotstxt/Controller.php
+++ b/src/Plugins/Robotstxt/Controller.php
@@ -6,7 +6,6 @@
 use AntCMS\Config;
 use AntCMS\PluginController;
 use AntCMS\Tools;
-
 use Flight;
 
 class Controller extends AbstractPlugin
diff --git a/src/Plugins/System/Controller.php b/src/Plugins/System/Controller.php
index 0165d5c..10c2777 100644
--- a/src/Plugins/System/Controller.php
+++ b/src/Plugins/System/Controller.php
@@ -3,6 +3,7 @@
 namespace AntCMS\Plugins\System;
 
 use AntCMS\AbstractPlugin;
+use AntCMS\AntCMS;
 use AntCMS\HookController;
 
 class Controller extends AbstractPlugin
@@ -11,13 +12,15 @@ class Controller extends AbstractPlugin
      * @var array<string, string>
      */
     private array $hooks = [
-        'contentHit' => 'This is fired when markdown content is accessed. The URI will be passed in the data.',
-        'performanceMetricsBuilt' => 'When fired, this event contains all performance metrics AntCMS was able to collect on a request. These are more complete & accurate than the metrics shown on the bottom of the screen.',
-        'beforeApiCalled' => 'This event is fired before an API endpoint is called',
-        'afterApiCalled' => 'This event is fired after an API endpoint is called and the response is available',
+        'onAfterContentHit' => 'This is fired when markdown content is accessed. The URI will be passed in the data.',
+        'onAfterPerformanceMetricsBuilt' => 'When fired, this event contains all performance metrics AntCMS was able to collect on a request. These are more complete & accurate than the metrics shown on the bottom of the screen.',
+        'onBeforeApiCalled' => 'This event is fired before an API endpoint is called.',
+        'onAfterApiCalled' => 'This event is fired after an API endpoint is called and the response is available.',
         'onHookFireComplete' => 'This event is fired when others have completed. The data provided will include the hook name, timing data, and parameter read / update statistics.',
-        'onBeforeMarkdownParsed' => 'This event is fired before markdown is converted, allowing for pre-processing before the markdown is run through the parser',
-        'onAfterMarkdownParsed' => 'This is fired after markdown is converted, allowing you to modify generated markdown content',
+        'onBeforeMarkdownParsed' => 'This event is fired before markdown is converted, allowing for pre-processing before the markdown is run through the parser.',
+        'onAfterMarkdownParsed' => 'This is fired after markdown is converted, allowing you to modify generated markdown content.',
+        'onAfterPluginsInit' => 'This event is fired after all plugins have been initialized.',
+        'onBeforeOutputFlushed' => 'This event is fired right before the generated response is finalized (compressed) and sent to the browser. No later chances to modify the output buffer exist.',
     ];
 
     public function __construct()
@@ -27,6 +30,16 @@ public function __construct()
             HookController::registerHook($name, $description);
         }
 
+        HookController::registerCallback('onBeforeOutputFlushed', $this->appendDebugInfo(...));
+
         $this->addDisallow('/api/*');
     }
+
+    private function appendDebugInfo(\AntCMS\Event $event): \AntCMS\Event
+    {
+        $params = $event->getParameters();
+        $params['output'] = str_replace('<!--AntCMS-Debug-->', \AntCMS\Tools::buildDebugInfo(), $params['output'] ?? '');
+        $event->setParameters($params);
+        return $event;
+    }
 }
diff --git a/src/index.php b/src/index.php
index 1e7ce8c..7575a45 100644
--- a/src/index.php
+++ b/src/index.php
@@ -17,8 +17,11 @@
 
 $AntCMS = new AntCMS();
 
-// Add a response body callback to display debug info
-Flight::response()->addResponseBodyCallback(fn ($body): string => str_replace('<!--AntCMS-Debug-->', Tools::buildDebugInfo(), $body));
+// Use hooks to perform any final changes to the output buffer before compressing and sending it
+Flight::response()->addResponseBodyCallback(function (string $body): string {
+    $event = HookController::fire('onBeforeOutputFlushed', ['output' => $body]);
+    return $event->getParameters()['output'];
+});
 
 // Setup CompressionBuffer & enable it in Flight
 CompressionBuffer::setUp(true, false, [Flight::response(), 'header']);
@@ -27,7 +30,7 @@
 }
 
 Flight::response()->addResponseBodyCallback(function ($body) {
-    HookController::fire('performanceMetricsBuilt', tools::getPerformanceMetrics());
+    HookController::fire('onAfterPerformanceMetricsBuilt', tools::getPerformanceMetrics());
     return $body;
 });