GravitationalCorpus names the mature condition in which a distributed body of work acquires autonomous attractive force: the corpus no longer waits to be promoted, explained, or authorised from outside, because its accumulated density begins to organise attention around itself. Within Socioplastics [2507], this operator marks the passage from accumulation to gravity, from a collection of nodes to a self-organising epistemic field capable of drawing citations, readings, retrievals, interpretations, pedagogical uses, and machinic indexing into its orbit. Its metrics are not merely numerical but architectural: Century Packs, thousand-node thresholds, DOI anchors, platform redundancy, recurrent CamelTags, cross-node references, VerticalSpine sequencing, and MasterIndex cartography all operate as forms of epistemic mass. A corpus of several thousand indexed nodes, distributed through Zenodo, Figshare, GitHub, Hugging Face, blogs, and public indexes, does not behave like a simple archive; it becomes a field with internal pull. The specific case of Core IV is decisive because it formalises this gravitational effect through its relation to StructuralCoherence, MapDimensioning, MeshEngine, and ThresholdClosure, showing how density becomes legible, measurable, transmissible, and stable. In practical terms, GravitationalCorpus explains why later nodes can be found, cited, reused, or interpreted without constant authorial intervention: recurrence itself produces attraction. Its conclusion is therefore ontological and operational at once: knowledge infrastructure, when sufficiently dense, coherent, and publicly anchored, begins to attract without asking, transforming Socioplastics from a authored project into an inhabitable field of durable intellectual gravity. Antonopoulos, A. (2025) Socioplastics [2507]: GravitationalCorpus. Zenodo. doi:10.5281/zenodo.19889779
