Outputs and retries

$agent = AgentSdk::createAgent(new AgentDefinition(
    id: "research-agent",
    model: "openai/gpt-5.4-nano",
    modelRetry: new ModelRetryConfig(
        maxRetries: 3,
        baseDelayMs: 500,
        maxDelayMs: 4000
    )
));

$result = $agent->run(input: $prompt, client: $client);

echo $result->output;
echo $result->run->status;
echo $result->usage["total_tokens"];
echo $result->usage["cost"];