This research conceives architecture not as a finished form, but as a compositional system generated by discrete modules and their connection grammar. Designers do not directly determine form; rather, they define the process of architectural realization by designing the types of modules, their connection rules, and their behavior. We construct a design process where architecture assembles in response to external conditions such as site constraints and the surrounding environment, demonstrating how different architectural forms can be derived from the same modular system according to specific conditions. This aims to treat architecture as a renewable and flexible composition.