No process here writes a data store. Every flow ends at 3.7 and is gone when the page closes. What the app computes is not what it stores. The spot curves, breakeven inflation and bid and ask spreads are nonetheless available from R2, because the same fitting math runs a second time as a scheduled job inside Level 1 process 1, writing S13, S14 and S15. The math is defined once, in shared/src/spot-curve.js, and imported by both. 3.1 is the only process that reads a store; the rest take their input from each other. It explodes at Level 3. GSW curve parameters are the Federal Reserve’s own published fit, read as a reference line rather than computed here.