public class OrderAggregate : Aggregate, ISubscribes<OrderPlaced>
{
    public Task HandleAsync(OrderPlaced @event) => ...;
    public void PlaceOrder(decimal amount) => Raise(new OrderPlaced());
}

// Default constructor
var order = await factory.CreateAsync<OrderAggregate>();

// With constructor arguments
var order = await factory.CreateAsync<OrderAggregate>(logger);

// From service provider (auto-resolves deps)
var order = await factory.CreateFromServiceProviderAsync<OrderAggregate>();

// Wrap existing instance
var order = await factory.CreateFromInstanceAsync(existingOrder);