Abstract: In one aspect, there is provided a method. The method may include performing, by a sequencer, one or more validations of a plurality of extensions to a core service of a business system; controlling, by the sequencer, execution of a sequence including the plurality of extensions and the core service to enable an action to be performed at the business system; and performing, by the sequencer, one or more post-processing checks of the plurality of extensions. Related systems, methods, and articles of manufacture are also disclosed.