We consider agents as systems that can perform tasks and act in a range of digital and physical environments in the name of the user. Today, these agents are still at an early stage. The SDK Nova Act is a crucial step, towards the construction of reliable agents by allowing developers to decompose complex workflows in atomic controls (for example, research, payment, answer questions on the screen). It also allows developers to add more detailed instructions to these commands if necessary (for example, “do not accept the wind assistance”), call the APIs, and even more to further strengthen reliability.