Abstract: Disclosed are various embodiments of systems, methods and computer programs that facilitate extensibility of legacy software applications by heuristic event and trigger detection. A host system in which a target application is executed is accessed. At least one trigger within the host system is detected. Triggers are generated by activating functionality of the target application and extracted from a corresponding at least one data object created by the target application. At least one response to triggers are defined, and a helper agent is configured to execute the at least one response.