diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index b4da5e23..a424acee 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -31,8 +31,6 @@
     ->setRules([
         '@Symfony' => true,
         '@Symfony:risky' => true,
-        'protected_to_private' => false,
-        'declare_strict_types' => false,
         'header_comment' => ['header' => $fileHeader],
         'php_unit_test_case_static_method_calls' => ['call_type' => 'this'],
     ])
diff --git a/examples/client/http_client_communication.php b/examples/client/http_client_communication.php
index 987b190c..f5a39ea9 100644
--- a/examples/client/http_client_communication.php
+++ b/examples/client/http_client_communication.php
@@ -1,5 +1,14 @@
 <?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.
+ */
+
 /**
  * HTTP Client Communication Example.
  *
@@ -20,17 +29,6 @@
  * Eg. symfony serve --passthru=examples/server/client-communication/server.php --no-tls
  */
 
-declare(strict_types=1);
-
-/*
- * 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.
- */
-
 require_once __DIR__.'/../../vendor/autoload.php';
 
 use Mcp\Client;
diff --git a/examples/client/http_discovery_calculator.php b/examples/client/http_discovery_calculator.php
index ae8babdd..ffcfa67d 100644
--- a/examples/client/http_discovery_calculator.php
+++ b/examples/client/http_discovery_calculator.php
@@ -1,5 +1,14 @@
 <?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.
+ */
+
 /**
  * HTTP Client Example.
  *
@@ -12,17 +21,6 @@
  *   php -S localhost:8080 examples/server/http-discovery-calculator/server.php
  */
 
-declare(strict_types=1);
-
-/*
- * 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.
- */
-
 require_once __DIR__.'/../../vendor/autoload.php';
 
 use Mcp\Client;
diff --git a/examples/client/stdio_client_communication.php b/examples/client/stdio_client_communication.php
index 7d839353..8b71cf00 100644
--- a/examples/client/stdio_client_communication.php
+++ b/examples/client/stdio_client_communication.php
@@ -1,5 +1,14 @@
 <?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.
+ */
+
 /**
  * STDIO Client Communication Example.
  *
@@ -11,17 +20,6 @@
  * Usage: php examples/client/stdio_client_communication.php
  */
 
-declare(strict_types=1);
-
-/*
- * 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.
- */
-
 require_once __DIR__.'/../../vendor/autoload.php';
 
 use Mcp\Client;
diff --git a/examples/client/stdio_discovery_calculator.php b/examples/client/stdio_discovery_calculator.php
index 7d25a807..60719735 100644
--- a/examples/client/stdio_discovery_calculator.php
+++ b/examples/client/stdio_discovery_calculator.php
@@ -1,16 +1,5 @@
 <?php
 
-/**
- * Simple STDIO Client Example.
- *
- * This example demonstrates how to use the MCP client with a STDIO transport
- * to communicate with an MCP server running as a child process.
- *
- * Usage: php examples/client/stdio_discovery_calculator.php
- */
-
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
@@ -20,6 +9,15 @@
  * file that was distributed with this source code.
  */
 
+/**
+ * Simple STDIO Client Example.
+ *
+ * This example demonstrates how to use the MCP client with a STDIO transport
+ * to communicate with an MCP server running as a child process.
+ *
+ * Usage: php examples/client/stdio_discovery_calculator.php
+ */
+
 require_once __DIR__.'/../../vendor/autoload.php';
 
 use Mcp\Client;
diff --git a/examples/server/cached-discovery/CachedCalculatorElements.php b/examples/server/cached-discovery/CachedCalculatorElements.php
index 9e9766b3..07e97520 100644
--- a/examples/server/cached-discovery/CachedCalculatorElements.php
+++ b/examples/server/cached-discovery/CachedCalculatorElements.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/cached-discovery/server.php b/examples/server/cached-discovery/server.php
index 1d6c1e16..27e147be 100644
--- a/examples/server/cached-discovery/server.php
+++ b/examples/server/cached-discovery/server.php
@@ -1,8 +1,6 @@
 #!/usr/bin/env php
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/elicitation/ElicitationHandlers.php b/examples/server/elicitation/ElicitationHandlers.php
index 0803dd9c..91055749 100644
--- a/examples/server/elicitation/ElicitationHandlers.php
+++ b/examples/server/elicitation/ElicitationHandlers.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/elicitation/server.php b/examples/server/elicitation/server.php
index f8d6a474..28a9b917 100644
--- a/examples/server/elicitation/server.php
+++ b/examples/server/elicitation/server.php
@@ -1,8 +1,6 @@
 #!/usr/bin/env php
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/oauth-keycloak/McpElements.php b/examples/server/oauth-keycloak/McpElements.php
index 6825f198..b7234c7f 100644
--- a/examples/server/oauth-keycloak/McpElements.php
+++ b/examples/server/oauth-keycloak/McpElements.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/oauth-keycloak/server.php b/examples/server/oauth-keycloak/server.php
index e9f5acbc..bdd22b90 100644
--- a/examples/server/oauth-keycloak/server.php
+++ b/examples/server/oauth-keycloak/server.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/oauth-microsoft/McpElements.php b/examples/server/oauth-microsoft/McpElements.php
index 06eeaa03..48208f22 100644
--- a/examples/server/oauth-microsoft/McpElements.php
+++ b/examples/server/oauth-microsoft/McpElements.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/examples/server/oauth-microsoft/server.php b/examples/server/oauth-microsoft/server.php
index ad827e0b..419817cc 100644
--- a/examples/server/oauth-microsoft/server.php
+++ b/examples/server/oauth-microsoft/server.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Event/ErrorEvent.php b/src/Event/ErrorEvent.php
index a272d802..65ce650d 100644
--- a/src/Event/ErrorEvent.php
+++ b/src/Event/ErrorEvent.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Event/NotificationEvent.php b/src/Event/NotificationEvent.php
index f2dbe298..579d877d 100644
--- a/src/Event/NotificationEvent.php
+++ b/src/Event/NotificationEvent.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Event/RequestEvent.php b/src/Event/RequestEvent.php
index 6ffbb99f..3a7de08e 100644
--- a/src/Event/RequestEvent.php
+++ b/src/Event/RequestEvent.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Event/ResponseEvent.php b/src/Event/ResponseEvent.php
index c5aac45a..94b9a907 100644
--- a/src/Event/ResponseEvent.php
+++ b/src/Event/ResponseEvent.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Exception/ClientException.php b/src/Exception/ClientException.php
index f77394ff..33e36680 100644
--- a/src/Exception/ClientException.php
+++ b/src/Exception/ClientException.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/AbstractSchemaDefinition.php b/src/Schema/Elicitation/AbstractSchemaDefinition.php
index ec83fa94..63fdc219 100644
--- a/src/Schema/Elicitation/AbstractSchemaDefinition.php
+++ b/src/Schema/Elicitation/AbstractSchemaDefinition.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/BooleanSchemaDefinition.php b/src/Schema/Elicitation/BooleanSchemaDefinition.php
index 13b69848..9cfaa8a3 100644
--- a/src/Schema/Elicitation/BooleanSchemaDefinition.php
+++ b/src/Schema/Elicitation/BooleanSchemaDefinition.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/ElicitationSchema.php b/src/Schema/Elicitation/ElicitationSchema.php
index 4e4221ab..1e4486ca 100644
--- a/src/Schema/Elicitation/ElicitationSchema.php
+++ b/src/Schema/Elicitation/ElicitationSchema.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/EnumSchemaDefinition.php b/src/Schema/Elicitation/EnumSchemaDefinition.php
index 1e87c731..003bf354 100644
--- a/src/Schema/Elicitation/EnumSchemaDefinition.php
+++ b/src/Schema/Elicitation/EnumSchemaDefinition.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/NumberSchemaDefinition.php b/src/Schema/Elicitation/NumberSchemaDefinition.php
index 0b3b61ba..0ad32771 100644
--- a/src/Schema/Elicitation/NumberSchemaDefinition.php
+++ b/src/Schema/Elicitation/NumberSchemaDefinition.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Elicitation/StringSchemaDefinition.php b/src/Schema/Elicitation/StringSchemaDefinition.php
index cb0fa7b5..76319261 100644
--- a/src/Schema/Elicitation/StringSchemaDefinition.php
+++ b/src/Schema/Elicitation/StringSchemaDefinition.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Enum/ElicitAction.php b/src/Schema/Enum/ElicitAction.php
index d01158c3..373e6189 100644
--- a/src/Schema/Enum/ElicitAction.php
+++ b/src/Schema/Enum/ElicitAction.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Request/ElicitRequest.php b/src/Schema/Request/ElicitRequest.php
index 5bb2e598..ab56e10c 100644
--- a/src/Schema/Request/ElicitRequest.php
+++ b/src/Schema/Request/ElicitRequest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Schema/Result/ElicitResult.php b/src/Schema/Result/ElicitResult.php
index 7f98d62d..d667374d 100644
--- a/src/Schema/Result/ElicitResult.php
+++ b/src/Schema/Result/ElicitResult.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Server/NativeClock.php b/src/Server/NativeClock.php
index 5e0b9d28..fc18e4e5 100644
--- a/src/Server/NativeClock.php
+++ b/src/Server/NativeClock.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Server/Session/FileSessionStore.php b/src/Server/Session/FileSessionStore.php
index 0a7b7cd4..aa99aba8 100644
--- a/src/Server/Session/FileSessionStore.php
+++ b/src/Server/Session/FileSessionStore.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Server/Session/InMemorySessionStore.php b/src/Server/Session/InMemorySessionStore.php
index 9f8077c6..04779803 100644
--- a/src/Server/Session/InMemorySessionStore.php
+++ b/src/Server/Session/InMemorySessionStore.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Server/Session/Psr16SessionStore.php b/src/Server/Session/Psr16SessionStore.php
index a4410db5..29ae8ac3 100644
--- a/src/Server/Session/Psr16SessionStore.php
+++ b/src/Server/Session/Psr16SessionStore.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/src/Server/Session/Session.php b/src/Server/Session/Session.php
index 66f92941..6eee72d1 100644
--- a/src/Server/Session/Session.php
+++ b/src/Server/Session/Session.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Elicitation/BooleanSchemaDefinitionTest.php b/tests/Unit/Schema/Elicitation/BooleanSchemaDefinitionTest.php
index b6fc6f07..fefea478 100644
--- a/tests/Unit/Schema/Elicitation/BooleanSchemaDefinitionTest.php
+++ b/tests/Unit/Schema/Elicitation/BooleanSchemaDefinitionTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Elicitation/ElicitationSchemaTest.php b/tests/Unit/Schema/Elicitation/ElicitationSchemaTest.php
index d604558b..3117de90 100644
--- a/tests/Unit/Schema/Elicitation/ElicitationSchemaTest.php
+++ b/tests/Unit/Schema/Elicitation/ElicitationSchemaTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Elicitation/EnumSchemaDefinitionTest.php b/tests/Unit/Schema/Elicitation/EnumSchemaDefinitionTest.php
index 0b90566e..1bd55ccd 100644
--- a/tests/Unit/Schema/Elicitation/EnumSchemaDefinitionTest.php
+++ b/tests/Unit/Schema/Elicitation/EnumSchemaDefinitionTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Elicitation/NumberSchemaDefinitionTest.php b/tests/Unit/Schema/Elicitation/NumberSchemaDefinitionTest.php
index da234b89..8ebdee74 100644
--- a/tests/Unit/Schema/Elicitation/NumberSchemaDefinitionTest.php
+++ b/tests/Unit/Schema/Elicitation/NumberSchemaDefinitionTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Elicitation/StringSchemaDefinitionTest.php b/tests/Unit/Schema/Elicitation/StringSchemaDefinitionTest.php
index eed896c3..dbb3277d 100644
--- a/tests/Unit/Schema/Elicitation/StringSchemaDefinitionTest.php
+++ b/tests/Unit/Schema/Elicitation/StringSchemaDefinitionTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Enum/ElicitActionTest.php b/tests/Unit/Schema/Enum/ElicitActionTest.php
index 059ca4f2..47ea4a6a 100644
--- a/tests/Unit/Schema/Enum/ElicitActionTest.php
+++ b/tests/Unit/Schema/Enum/ElicitActionTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Request/ElicitRequestTest.php b/tests/Unit/Schema/Request/ElicitRequestTest.php
index 06cee6a9..5421e3d7 100644
--- a/tests/Unit/Schema/Request/ElicitRequestTest.php
+++ b/tests/Unit/Schema/Request/ElicitRequestTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *
diff --git a/tests/Unit/Schema/Result/ElicitResultTest.php b/tests/Unit/Schema/Result/ElicitResultTest.php
index 6ca5fb81..6ffd15cf 100644
--- a/tests/Unit/Schema/Result/ElicitResultTest.php
+++ b/tests/Unit/Schema/Result/ElicitResultTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the official PHP MCP SDK.
  *