Adding an AI model to an application can look simple from the outside. Send a prompt, receive a response, and display the result. In a real application, however, the model is only one part of the system. Developers also need to think about authentication, APIs, data access, error handling, latency, monitoring, and what happens when the model produces an unexpected response. The interesting engineering problem is not simply how to call an AI model . It is how to connect that model to an...