response()->stream() throws error in legacy SSE mode

[sergioalborada]

When using legacy SSE transport (legacy: true), MCP throws the following error:

[2025-07-09 08:08:33] local.ERROR: Symfony\Component\HttpFoundation\StreamedResponse::__construct(): Argument #2 ($status) must be of type int, array given, called in /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ResponseFactory.php on line 173 {"exception":"[object] (TypeError(code: 0): Symfony\\Component\\HttpFoundation\\StreamedResponse::__construct(): Argument #2 ($status) must be of type int, array given, called in /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ResponseFactory.php on line 173 at /var/www/html/vendor/symfony/http-foundation/StreamedResponse.php:38)
[stacktrace]
#0 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ResponseFactory.php(173): Symfony\\Component\\HttpFoundation\\StreamedResponse->__construct(Object(Closure), Array, Array)
#1 /var/www/html/vendor/php-mcp/laravel/src/Transports/HttpServerTransport.php(138): Illuminate\\Routing\\ResponseFactory->stream(Object(Closure), Array)
#2 /var/www/html/vendor/php-mcp/laravel/src/Http/Controllers/SseTransportController.php(43): PhpMcp\\Laravel\\Transports\\HttpServerTransport->handleSseRequest(Object(Illuminate\\Http\\Request))
#3 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(47): PhpMcp\\Laravel\\Http\\Controllers\\SseTransportController->handleSse(Object(Illuminate\\Http\\Request))

This is caused by calling response()->stream(callback, [headers]) where the headers array is incorrectly passed as the second argument instead of the third.

Fix is simple: add 200 as second argument or either pass the headers as a named argument.