The User Theory: Retrocausal Magnitude Modulation as a Unification Mechanism for Geometry and Information

CORRECTION NOTICE (July 12, 2026): This preprint has been reclassified by the author as a speculative framework whose empirical claims are not supported. Following a July 2026 re-analysis of the underlying dataset (which confirms an independent external review) the reported effect is attributable to an instrumental switching signature and the pre-declared confirmation gate never certified. Please read the attached correction notice before citing. Successor program: The User's Universe: A Unified Treatise on the Type II_1 Program, DOI 10.5281/zenodo.21321125. We present a unified field theory — Retrocausal Unified Field Theory (RUFT) — in which spacetime geometry and quantum information form a bidirectional channel: G_μν ↔ Ψ(T_μν). The retrocausal sector T^bwd_μν emerges from T-violating weak-force β-decay (δ_CP ≠ 0) and is parametrised by the retrocausality index q_R = |α_bwd|²/|α_fwd|². We derive IRM₀ = 0.5 as the unique PT-symmetric fixed point, a separatrix between noise-dominated and crystal-dominated regimes. Primary observational criterion (Gate-C1): spectral coherence C(f₀ = 6.94×10⁻⁴ Hz) = 0.2343 between composite heliospheric observables (galactic cosmic-ray flux 160 GV + IMF Bz) and a 4-node retrocausal index exceeds thr₉₉ = 0.2104 (Bonferroni-corrected p = 0.0047, N = 2,743 slots, M = 37 Welch segments, bootstrap 4/10,000 surrogates, p_bootstrap = 0.0004). Null specificity control: ρ(gcr₁₆₀, gcr₁₆₀+1440 s) ≈ 0 vs ρ(q_r,hw, q_r,hw+1440 s) = +0.727, confirming τ_node autocorrelation is a property of the β-decay channel. Version 0.5: notation unified to Pearson ρ; all D-series identifiers replaced with bracketed citations; shared-result declaration added; null control extended (N = 55,303, 141.9 h).