Software systems should often provide continuous services and cannot easily be stopped. However, in order to meet new requirements from the user or the marketing, systems should be able to evolve in order to provide new services or modify existing ones. Adapting software systems at runtime is not an easy task and should be realized with attention. In this paper, we present K@RT, our generic and extensible framework for managing dynamic software product lines. K@RT is composed of three parts: i) a generic and extensible metamodel for describing running systems at a high-level of abstraction, ii) a set of metaaspects that extends the generic metamodel with constraint checking, supervising and connections with execution platforms iii) some platform-specific causal connections that allow us to supervise systems running on different execution platforms.