One embodiment of the present invention provides a system for extending a gadget. During operation, the system initially executes a gadget extension which extends a host gadget. In doing so, the system obtains from the gadget extension a specifier for the host gadget and a specifier for an interface. Next, the system establishes a communication interface between the gadget extension and the host gadget through the interface. Finally, the system uses functionality of the host gadget within the gadget extension via communication through the communication interface.