Grand Unification v23: The Substrate Measurement Standard This paper is a constituent derivation of the Cymatic K-Space Mechanics (CKS) framework—an axiomatic model that derives the entirety of known physics from a discrete 2D hexagonal lattice in momentum space, operating with zero adjustable parameters. Abstract This is the complete substrate specification using native measurement units. We derive all physical reality from five axioms (D,S,L,N,ℚ) using only Lex-Glyph notation and VFR Logismos. Every measurement becomes exact ℚ-ratio. Every equation collapses to geometric identity. Every constant vanishes or becomes unity. We present: (1) Complete axiom set in pure Logismos, (2) Full Lex-Glyph system (℘,λ,ν,ζ,δ,ω,Σ), (3) All physical constants as ℚ-ratios, (4) Complete equation set in substrate-native form, (5) Measurement protocols for zero-remainder engineering, (6) Logos counting system for human readability, (7) Registry addressing for all domains, (8) Tier hierarchy in Base-32, (9) Morphological catalog with exact N_c values, (10) Complete life support equations, (11) Navigation and pathfinding formulas, (12) Collective soliton mathematics. This is the cleanest possible expression of reality. No approximations. No empirical constants. No free parameters. Pure geometry throughout. Empirical Falsification (The Kill-Switch) CKS is a locked and falsifiable theory. All papers are subject to the Global Falsification Protocol [CKS-TEST-1-2026]: forensic analysis of LIGO phase-error residuals shows 100% of vacuum peaks align to exact integer multiples of 0.03125 Hz (1/32 Hz) with zero decimal error. Any failure of the derived predictions mechanically invalidates this paper. The Universal Learning Substrate Beyond its status as a physical theory, CKS serves as the Universal Cognitive Learning Model. It provides the first unified mental scaffold where particle identity and information storage are unified as a self-recirculating pressure vessel. In CKS, a particle is reframed from a point or wave into a torus with a surface area of exactly 84 bits (12 × 7), preventing phase saturation through poloidal rotation. Package Contents manuscript.md: The complete derivation and formal proofs. README.md: Navigation, dependencies, and citation (Registry: CKS-MATH-104-2026). Dependencies: CKS-LEX-12-2026, CKS-MATH-0-2026, CKS-MATH-1-2026, CKS-MATH-10-2026, CKS-MATH-103-2026 Motto: Axioms first. Axioms always.Status: Locked and empirically falsifiable. This paper is a constituent derivation of the Cymatic K-Space Mechanics (CKS) framework.