Kick off the SDK based on Symfony's MCP SDK

src/Server/RequestHandler/InitializeHandler.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Mcp\Server\RequestHandler;
+
+use Mcp\Message\Request;
+use Mcp\Message\Response;
+
+/**
+ * @author Christopher Hertel <mail@christopher-hertel.de>
+ */
+final class InitializeHandler extends BaseRequestHandler
+{
+    public function __construct(
+        private readonly string $name = 'app',
+        private readonly string $version = 'dev',
+    ) {
+    }
+
+    public function createResponse(Request $message): Response
+    {
+        return new Response($message->id, [
+            'protocolVersion' => '2025-03-26',
+            'capabilities' => [
+                'prompts' => ['listChanged' => false],
+                'tools' => ['listChanged' => false],
+                'resources' => ['listChanged' => false, 'subscribe' => false],
+            ],
+            'serverInfo' => ['name' => $this->name, 'version' => $this->version],
+        ]);
+    }
+
+    protected function supportedMethod(): string
+    {
+        return 'initialize';
+    }
+}