Gas-to-Stellar State Is the Leading Predictor of Outer Support Requirement in High-Vflat SPARC Galaxies (v5 — Writing Freeze)

Phase 122 Writing Freeze. Analysis complete and frozen. Main finding: log(MHI/L3.6) is the strongest independent predictor of outer mass discrepancy (logOMD = log10 mean Vobs²/Vbar² outer) in high-Vflat SPARC galaxies (Vflat ≥ 70 km/s, N=104). Adopted model: logOMD = 1.749 + 0.203×log(MHI/L3.6) − 0.101×log(Mbar), LOO R²=0.584. Includes Phase 120 mechanism map (ratio beats both components), Phase 121 minimal physical model (2-var adopted, 3-var exploratory only due to haloMass circularity), anti-circularity battery (6/6 pass, 7.5σ), halo anchoring (76% persists), model competition (no single model wins), and complete manuscript draft. All scripts and results included for full reproducibility. Data: SPARC (Lelli, McGaugh & Schombert, 2016, AJ 152, 157).