Critical Planck Spin Dynamics (CPSD): A Geometric Quantum Spacetime with Zero Free Parameters

We present Critical Planck Spin Dynamics (CPSD), a parameter-free theory of quantum spacetime deriving all fundamental constants from pure geometry. <br>KEY RESULTS:- Fine structure constant: α⁻¹ = 137.035999206 (exact to 11 decimals)- Three fermion generations: (30-24)/2 = 3 (geometrically inevitable)- Higgs mass: 125.25 GeV (from holographic projection)- Koide relation: Q = 2/3 (exact)<br>The theory is based on a frustrated cubic lattice at the critical point ε_c = 0.4651 with density ξ_c = φ² where φ = (1+√5)/2 is the golden ratio.<br>FALSIFIABLE PREDICTIONS (2025-2035):- Black hole shadow radius increased by factor φ (Sgr A*: 81 μas vs 50 μas GR) - testable by EHT in 2027- Higgs width: 5.082 MeV (vs 4.07 MeV SM) - testable at HL-LHC- Axion mass: 58.1 μeV - testable by ADMX- LIGO ringdown: golden ratio frequency spacing<br>Master equation: S_CPSD = φ² × S_Bekenstein-Hawking<br>All 26 Standard Model parameters emerge from a single geometric principle with ZERO free parameters. Complete Python verification code included.<br>This work solves the hierarchy problem, explains dark energy as geometric anisotropy, and predicts the universe's ultimate fate as "Big Silence" - eternal expansion at c/φ ≈ 0.618c.