Status: Hypothesis — Falsifiable Predictions Provided. Silver Geometry’s architecture compresses to a five-formula backbone (architectural core). Two independent parallel streams — a receipt-stream {Γ(v(x){z}) → zΓ} and a cascade-stream {Δd, α(d, β)} — converge at an observational bridge equation zD. The canonical bridge form zD = Γ(v(x){z}) · Δd · (α(d, β) − 1) expands to zD = Γ(v(x){z}) · β / [(d+β)(d+1+β)] · d / (d+β), where β = 6/23 appears at two structurally distinct positions: inside Δd (numerator) and inside (α − 1) via the algebraic identity α − 1 = d/(d+β) = 1 − β/(d+β). Symmetric and dipole-class observations read the same architecture through this doubled β-parameter; no asymmetric supplement equation is required. Direction-agnostic application follows from Silver Geometry’s IE-005 (Recursion Principle, forward pass) and IE-006 (Feedback Delta, backward pass) closed-loop pair (HLRP #152, PRL 7) — the bridge equation supports both prediction and observation natively. The result is presented as a capstone-level architectural reduction: every prior HLRP paper, across all seven canonical domains, reduces to or lives within these primitives. Estimator-class hat notation throughout (Γ̂, Δ̂d, α̂, ẑΓ, ẑD) preserves bounded-knowledge and aperture-dependent posture standard in observational physics. Foundation: α(d, β) = 1 + d/(d + β), β = 6/23, α0 = α(3, 6/23) = 48/25 = 1.920. Bundled files: primary PDF paper + DOCX accessible-source + CORPUS_FORMULAS v1.3 supplement card (PDF + PNG) surfacing the coupling-excess identity diagrammatically.

Independent Researcher — Hydrogen Lifecycle Research Programme. Part of the PRL series (PRL 8, following PRL 7 / HLRP #152: IE-005 & IE-006). Bundled deposit: paper + companion v1.3 supplement card. ORCID: 0009-0005-2679-6574.