diff --git a/public/admin/session-debug.php b/public/admin/session-debug.php
new file mode 100644
index 0000000..bb663e3
--- /dev/null
+++ b/public/admin/session-debug.php
@@ -0,0 +1,24 @@
+<?php
+declare(strict_types=1);
+
+$configPath = dirname(__DIR__) . '/../inc/config.php';
+if (is_file($configPath)) {
+    require_once $configPath;
+}
+
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
+$sessionName = session_name();
+$sessionId = session_id();
+$cookies = $_COOKIE;
+$sessionData = $_SESSION ?? [];
+
+header('Content-Type: application/json; charset=utf-8');
+echo json_encode([
+    'session_name' => $sessionName,
+    'session_id'   => $sessionId,
+    'cookies'      => $cookies,
+    'session'      => $sessionData,
+], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);