AgonisticSpace names the condition through which space becomes legible as structured conflict rather than neutral extension, aesthetic surface, or administrative container. Within Socioplastics, a square, pavement, platform, archive, classroom, façade, dataset, or exhibition is never empty ground; it is a charged scene where bodies, institutions, materials, climates, images, and claims encounter one another under unequal conditions. Yet conflict without mediation risks spectacle or paralysis. LateralGovernance supplies the distributed grammar through which agonism is negotiated across neighbourhoods, repositories, publics, institutions, maintenance routines, permissions, protocols, informal agreements, and partial authorities. It does not romanticise horizontality, but examines how power moves sideways when no single centre can account for the whole field. ThermalJustice then grounds this political structure in embodied exposure: heat, shade, pavement, vegetation, energy, housing, mobility, and climatic asymmetry become the material substrates through which inequality is produced and felt. A specific urban case clarifies the triad: an unshaded bus stop beside overheated housing and rent-pressured streets is not merely a design failure, but an agonistic field where infrastructure, governance, class, climate, and bodily vulnerability converge. Together, AgonisticSpace gives political intensity, LateralGovernance gives structural mediation, and ThermalJustice gives operative ground. Public space consequently ceases to be where conflict appears after design; it becomes the regime through which conflict is produced, distributed, governed, and endured. A socioplastic city begins where heat, power, and form become readable together.

ThresholdClosure names the grammatical seal through which a field stabilises without surrendering to permanent enclosure. Within Socioplastics, openness is not treated as an unconditional virtue, since a field without thresholds does not become more accessible but increasingly uninhabitable. Closure, properly understood, is neither wall nor indiscriminate membrane; it is the provisional act by which a deposit begins to hold form, resisting dilution while remaining plastic enough to admit future sediment. Yet closure only becomes structural through linguistic maturation. SemanticHardening describes the process by which terms acquire load-bearing capacity through recurrence, citation, pedagogy, misuse, correction, and critical response. A new operator begins as malleable clay; repeated use sharpens its edges, stabilises its referents, and makes incoherent deployment detectable. Hardening is therefore not the negation of plasticity, but the condition under which plasticity can carry force rather than evaporate into ambiguity. DualAddress then grounds both closure and hardening in contemporary inscription, where a single node must speak to human readers requiring argument, context, and rhythm, while also remaining parseable by repositories, citation indexes, search engines, metadata systems, and machine agents. A specific archival case clarifies the triad: a CamelTag, DOI record, blog essay, and repository slug together seal a concept, harden its semantic use, and make it legible across interpretive and computational publics. Together, ThresholdClosure gives boundary, SemanticHardening gives terminological strength, and DualAddress gives infrastructural reach. The living field seals where necessary, hardens through use, and speaks to every interpreter that matters.