Introduce schema component

src/Schema/Implementation.php

@@ -0,0 +1,60 @@
+<?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\Schema;
+
+use Mcp\Exception\InvalidArgumentException;
+
+/**
+ * Describes the name and version of an MCP implementation.
+ *
+ * @author Kyrian Obikwelu <koshnawaza@gmail.com>
+ */
+class Implementation implements \JsonSerializable
+{
+    public function __construct(
+        public readonly string $name = 'app',
+        public readonly string $version = 'dev',
+    ) {
+    }
+
+    /**
+     * @param array{
+     *     name: string,
+     *     version: string,
+     * } $data
+     */
+    public static function fromArray(array $data): self
+    {
+        if (empty($data['name']) || !\is_string($data['name'])) {
+            throw new InvalidArgumentException('Invalid or missing "name" in Implementation data.');
+        }
+        if (empty($data['version']) || !\is_string($data['version'])) {
+            throw new InvalidArgumentException('Invalid or missing "version" in Implementation data.');
+        }
+
+        return new self($data['name'], $data['version']);
+    }
+
+    /**
+     * @return array{
+     *     name: string,
+     *     version: string,
+     * }
+     */
+    public function jsonSerialize(): array
+    {
+        return [
+            'name' => $this->name,
+            'version' => $this->version,
+        ];
+    }
+}