[Bug]: streamResponse doesn't seem to work when just returning it like from the docs

[shininglove]

What happened?

public function chat(Request $request)
{
    $message = $request->input('message');
    $agent = WeatherAgent::for(auth()->id());
    
    // Return a streamable response
    return $agent->streamResponse($message, 'plain');
}

This leds to a ob_flush error in Laravel. I'm using Laravel 12 and tried PHP 8.3 and 8.4.

How to reproduce the bug

I've created a repo with minimal setup (Laravel Breeze + React): https://github.com/shininglove/laragent-repro

Package Version

0.5

PHP Version

8.4

Laravel Version

12

Which operating systems does with happen with?

Linux

Notes

No response

[shininglove]

Here is the logs:

[2025-08-13 05:56:51] local.ERROR: ob_flush(): Failed to flush buffer. No buffer to flush {"exception":"[object] (ErrorException(code: 0): ob_flush(): Failed to flush buffer. No buffer to flush at /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Agent.php:396)
[stacktrace]
#0 /home/shineslove/projects/repro/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(256): Illuminate\\Foundation\\Bootstrap\\HandleExceptions->handleError(8, 'ob_flush(): Fai...', '/home/shineslov...', 396)
#1 [internal function]: Illuminate\\Foundation\\Bootstrap\\HandleExceptions->{closure:Illuminate\\Foundation\\Bootstrap\\HandleExceptions::forwardsTo():255}(8, 'ob_flush(): Fai...', '/home/shineslov...', 396)
#2 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Agent.php(396): ob_flush()
#3 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Agent.php(328): LarAgent\\Agent->{closure:{closure:LarAgent\\Agent::streamResponse():372}:374}(Object(LarAgent\\Messages\\StreamedAssistantMessage))
#4 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Drivers/OpenAi/BaseOpenAiDriver.php(161): LarAgent\\Agent->{closure:{closure:LarAgent\\Agent::respondStreamed():312}:318}(Object(LarAgent\\Messages\\StreamedAssistantMessage))
#5 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/LarAgent.php(524): LarAgent\\Drivers\\OpenAi\\BaseOpenAiDriver->sendMessageStreamed(Array, Array, Object(Closure))
#6 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Agent.php(332): LarAgent\\LarAgent->stream(Object(LarAgent\\Messages\\UserMessage), Object(Closure))
#7 /home/shineslove/projects/repro/vendor/maestroerror/laragent/src/Agent.php(425): LarAgent\\Agent->{closure:LarAgent\\Agent::respondStreamed():312}()
#8 /home/shineslove/projects/repro/vendor/symfony/http-foundation/StreamedResponse.php(125): LarAgent\\Agent->{closure:LarAgent\\Agent::streamResponse():372}()
#9 /home/shineslove/projects/repro/vendor/symfony/http-foundation/Response.php(397): Symfony\\Component\\HttpFoundation\\StreamedResponse->sendContent()
#10 /home/shineslove/projects/repro/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(1219): Symfony\\Component\\HttpFoundation\\Response->send()
#11 /home/shineslove/projects/repro/public/index.php(20): Illuminate\\Foundation\\Application->handleRequest(Object(Illuminate\\Http\\Request))
#12 /home/shineslove/projects/repro/vendor/laravel/framework/src/Illuminate/Foundation/resources/server.php(23): require_once('/home/shineslov...')
#13 {main}
"} 

[MaestroError]

I couldn't find the chat method in your project you provided as an example @shininglove

Also, I couldn't reproduce an issue. I copied your provider and your AI Agent and your provided code example in issue, it all works

[shininglove]

@MaestroError oh sure its here: https://github.com/shininglove/laragent-repro/blob/main/routes/web.php

[shininglove]

okay the patch you sent on discord worked for this:

if (ob_get_level() > 0) {
    ob_flush();
}