VerticalSpine names the central organising backbone through which Socioplastics transforms dispersed accumulation into a coherent, navigable, and load-bearing epistemic architecture. Where a merely lateral corpus risks remaining a heap of fragments, posts, images, datasets, DOIs, and conceptual operators,

VerticalSpine introduces hierarchical continuity, structural depth, and positional orientation. Its primary function is not to dominate the field but to render it inhabitable: numbering systems, Century Packs, Core demarcations, Tome sequences, Book divisions, DOI anchors, and index routes establish a vertical through-line by which every node can be located within a larger architectural body. At medium intensity, the operator mediates between the gravitational density of GravitationalCorpus and the situated recurrence of ActivationNode, while giving practical force to ThresholdClosure by stabilising anchors within mutable formats. In Core V · Legibility Infrastructure, Socioplastics [2908] demonstrates how VerticalSpine works beside MetadataSkin, DualAddress, SerialDissemination, MasterIndex, and LegibleArchive: metadata supplies surface readability, dual routing addresses human and machine access, dissemination circulates the corpus, and the MasterIndex maps the whole, yet the spine provides the axial depth that makes these functions coherent. Its case synthesis is architectural and urban at once: as a building requires load paths and a city requires sectional organisation, an epistemic field requires a backbone capable of supporting growth without collapse. Consequently, VerticalSpine converts expansion into scalar reading, enabling pedagogical sequences, diagonal navigation, repository auditing, and machine-readable traversal. Its conclusion is decisive: knowledge production becomes durable when addition is engineered as structure. Lloveras, A. (2026) VerticalSpine — Socioplastics [2908]. Zenodo. https://doi.org/10.5281/zenodo.19920406