Based on the pedagogical exploration of the design studio--Matter Aggregation at UVA, the book seeks new values of wood craft for contemporary architectural design, by introducing digital design and robotic fabrication techniques into the design process for timber building. The book integrates explorations of traditional crafts with digital fabrication technique, establishing a digital crafting as a new field for contemporary practice. The book explores the computational mechanisms and diagrammatic grammar within these craft-based aggregation systems, paying close attention to geometrical configurations, material effects and fabrication details and take advantage of these qualities to produce a unique spatiality.