Add missing ConfigurationException

Author: OskarStark

src/Exception/ConfigurationException.php

@@ -0,0 +1,19 @@
+<?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\Exception;
+
+/**
+ * @author Oskar Stark <[email protected]>
+ */
+class ConfigurationException extends InvalidArgumentException
+{
+}

src/Server/ServerBuilder.php

@@ -21,6 +21,7 @@
 use Mcp\Capability\Registry;
 use Mcp\Capability\Registry\Container;
 use Mcp\Capability\Registry\ReferenceHandler;
+use Mcp\Exception\ConfigurationException;
 use Mcp\JsonRpc\Handler;
 use Mcp\Schema\Annotations;
 use Mcp\Schema\Implementation;
@@ -84,13 +85,16 @@ final class ServerBuilder
      *     annotations: Annotations|null}
      * > */
     private array $manualResourceTemplates = [];
+
     /** @var array<
      *     array{handler: array|string|Closure,
      *     name: string|null,
      *     description: string|null}
      * > */
     private array $manualPrompts = [];
+
     private ?string $discoveryBasePath = null;
+
     /**
      * @var array|string[]
      */