Its subtitle — Soft Ontology, Field Expansion and Experimental Knowledge Forms — clarifies the function of this phase. Tome IV organises a new mode of growth: structured, experimental, permeable and capable of testing new forms while preserving internal grammar. The structure is deliberately clear. Core VII · Soft Ontology gathers the sequence 3201–3210, the Soft Ontology Papers. These texts define the conditions through which a field becomes readable: structure, scale, density, visibility, soft edges, stable cores and careful design. They are “soft” because they prepare orientation through flexibility, modulation and conceptual hospitality. They give the reader a grammar for understanding how Socioplastics holds together while remaining open to further transformation. Core VIII · Plastic Periphery Activations gathers Pentagon I and Pentagon II. This second core moves from ontology to operation. Pentagon I develops knowledge-infrastructure operators such as DigestiveSurface, GrammaticalThreshold, SyntheticLegibility, LatencyDividend and PlasticPeripheries. Pentagon II extends the field through situated activations: RadicalEducation, ThermalJustice, ArchiveFatigue, ExpansionRisk and DiagonalReading. These concepts expand the vocabulary of the system and test how the field teaches, breathes, listens, governs its own growth and enables traversal. The didactic value of Tome IV lies in this distinction: Core VII teaches how the field appears; Core VIII teaches how the field acts. One clarifies the conditions of legibility; the other tests activations in pedagogy, ecology, archive, reading and expansion. Together, they make Tome IV a plastic classroom: a zone where Socioplastics becomes learnable, expandable and structurally alive. Its real function is to show that a mature field preserves its architecture while teaching the protocols through which that architecture keeps growing.