A handheld tool includes a handle； an implement mount configured to detachably accept and to rigidly hold a user-assistive implement； an actuator assembly mounted to the handle to physically manipulate the implement mount relative to the handle； a first sensor disposed to sense an orientation of the handle； a second sensor disposed to sense an orientation of the user-assistive implement； a controller disposed in or on the handle and coupled to the actuator assembly and the first and second sensors； and memory coupled to the controller. The memory stores instructions for identifying a type of the user-assistive implement attached to the implement mount, selecting a behavior routine based upon the type of the user-assistive implement identified, and manipulating the user-assistive implement relative to the handle according to the behavior routine to aid performance of a task with the handheld tool.
