The expression an idea in 4K names the moment when a dispersed practice becomes sharp enough to be understood as one field. In the case of Socioplastics, that field does not arise from a single discipline, but from the crossing of several practices that usually remain apart: architecture, curating, urban research, pedagogy, publishing, conceptual art, digital culture, and civic life. The point is not to place all these areas under a vague label, but to give them a shared structure strong enough to reveal how they think together. That structure can be read through a simple scale: one node contains one precise idea; ten nodes form a core; one hundred nodes become a book; one thousand nodes build a tome; and the full corpus holds the field as a navigable system. This order matters because a field is not born when many subjects are mentioned, but when their relations become legible. A classroom can then be read as civic infrastructure; an exhibition as an urban interface; an editorial project as a device of public memory; a cultural gesture as a modification of social space. The Socioplastics Index makes this possible by translating a long-term transdisciplinary project into a machine-readable dataset on Hugging Face, where the corpus is presented as urban theory, epistemic infrastructure, and structured knowledge for computational use. Its wider web index also frames Socioplastics as a research architecture with entrances into tomes, books, cores, channels, datasets, and external platforms. The result is not a generic archive, but a high-resolution field: an idea in 4K because it allows many practices to cross without losing their specificity, and to become one system without becoming simplified.