An interactive contact workflow system provides a graphical representation of a contact workflow in a graphical user interface (GUI) of an interactive contact run-time environment. The interactive contact workflow system receives a request to execute a first instruction block of the contact workflow within the interactive contact run-time environment, generates a communication interface to facilitate simulated electronic communication between the GUI and the interactive contact run-time environment, and provides a first visual indicator for display within the GUI that graphically highlights the first instruction block within the GUI to indicate that the first instruction block is active. The interactive contact workflow system then executes the first instruction block by sending a first prompt of the first instruction block to the communication interface to cause the communication interface to provide the first prompt to an audio output interface.