CROSS-PLATFORM COMMAND EXTENSIBILITY

An abstraction for one or more commands associated with a client application may be received upon deployment of a host application. The abstraction may be an extension with a same package and code such that the extension is enabled across a variety of platforms, host applications, and devices. For example, the extension may be displayed through a user interface of the host application based on definitions contained within the abstraction such that the extension is compatible with a platform and device on which the host application is deployed. The commands may be translated into graphical control elements, and displayed in conjunction with the extension based on the definitions. Upon invocation of one or more of the commands, an action may be performed based on the definitions enabling the client application to interact with content being created, edited, and/or viewed in the host application in an appropriate context.