The substance layer: one page per item-kind — md for content, html for display, osmx for data. Types live here; tokens (who owns what, where) live in the Cadastre. Internal preview — publication posture decides at S-006.
graphs/categories.osmx — root taxonomy, 27 categories (a DAG, never a tree)graphs/product-taxonomy.osmx — the space of THINGS: Google Product Taxonomy, 5,595 commerce categoriesgraphs/concept-taxonomy.osmx — the space of CONCEPTS: 792 practice/concept paths under 15 categories (paths only, provenance-tagged)These paths are the NEXUS embedding anchors — the grounded coordinate frame by which
every future megacity.studio asset is filed, ranked, sorted, and stored. Client catalogs
(e.g. materia-comics, the validated first overlay) live in their own repos and
reference these anchors; they are not part of the anchor set.
Nexus = memory · Codex = structure · Materia = substance · Cadastre = situation.