Shareable code objects (including a data object and/or executable program code) can be shared between accessories and mobile devices to facilitate interoperation of accessories and mobile devices. For instance, a shareable code object that contains configuration data for a particular accessory can be obtained by a mobile device from one accessory and subsequently shared with other accessories of similar type when they connect to the mobile device. As another example, a shareable code object that includes executable program code can facilitate interoperation of the accessory and the mobile device without the user having to download and install an app.