Published onMarch 31, 2026The Single-Driver Principle for Declarative Routing: Why There Can Be Only One Source of Navigation TruthReact-NativeExpo-RouterAuth-ArchitectureReact-QueryMechanism-AnalysisWhy a declarative auth gate and an imperative router.replace inevitably flicker when they coexist — and how one hidden timing fact (derived state flips before the promise resolves) amplifies the double-driver into a visible regression.