Summary This artifact derives spacetime as a structural consequence under Structural Flow. Within scope, spacetime is not treated as a primitive or independent entity. It is shown to be co-extensive with density, defined as the bounded holdability of interaction-conditioned structure under ongoing interaction. --- Core Claim Within the scope of this work: **Spacetime = Density** More precisely: > The structural object that physics describes as spacetime is the same object derived under Structural Flow as density. This is a translation and identification, not a replacement of existing physics. --- Method The derivation proceeds from a minimal structural framework: - Primitive: Chance (¯\(ツ)/¯ exists)- Hinge chain: Persistence → Boundary → Cascade → Authorization → Recognition → Coherence Using: - Failure-regime analysis- Structural necessity- Translation consistency with known physics roles --- Result The artifact demonstrates that: - The functional roles attributed to spacetime- Are structurally fulfilled by density- Without introducing new primitives or mechanisms --- Scope This is a scope-bound structural derivation. It does not: - Replace relativity- Propose new physical mechanisms- Claim full closure of physics It establishes a structural identity within defined limits. --- Author Statement This work was developed with AI-assisted drafting tools. All reasoning, structure, and final decisions are the author’s. --- Version v1.8 — Public Release