MetabolicLoop names the functional respiration of a field: the circulation through which concepts, citations, objections, rediscoveries, silences, and abandoned hypotheses are absorbed, decomposed, reactivated, or expelled. Within Socioplastics, a field is therefore not a static edifice but a metabolic system whose vitality depends on turnover. New datasets, hostile reviews, forgotten nodes, and peripheral fragments enter as nutrients, while archive fatigue, conceptual redundancy, and exhausted propositions emerge as waste. Yet metabolism without form becomes convulsion. StructuralCoherence provides the internal integrity that prevents circulation from dissolving into scatter. It is not homogeneity, but the load-bearing consistency that enables readers to move across nodes without epistemic vertigo: a vertical spine of canonical texts, scalar architecture linking micro and macro registers, and torsional dynamics capable of distributing contradiction without self-erasure. SensoryTrace grounds this physiology in the material evidence of encounter: DOI resolves, downloads, annotations, citations, syllabus inclusions, lingering fatigue, or remembered conceptual pressure. These traces are not mere metrics; they are the field’s proprioceptive signals, indicating where channels thicken, where passages silt, and where curiosity fails to become digestion. A specific scholarly case clarifies the triad: a dense corpus may attract downloads after public release, yet only citations, marginalia, teaching uptake, and conceptual reuse reveal whether it has been metabolised rather than merely accessed. When combined, MetabolicLoop supplies flow, StructuralCoherence supplies containment, and SensoryTrace supplies feedback. A living field breathes without flooding, holds without petrifying, and feels without becoming surveillance. Its durability is not ideological; it is physiological.