brew log.

Higher flow = less puck resistance. Rising trend at the same grind suggests beans losing CO₂. Each curve is a logarithmic fit (y = a + b·ln(x + 1)) on clean shots only; it captures the fast-early, slowing degradation shape without overfitting the handful of data points per bag. Fits are computed per grind setting — bags brewed with multiple grinds get one curve per grind, distinguished by stroke style (solid, then dashed, then dotted in the order each grind was first used). Solid dots are per-day averages of clean shots, hollow dashed rings are individual clean shots, and × marks shots excluded from the math (dial-in sweeps, prep mistakes, or process errors — hover for the reason). Shaded band is the rough espresso peak window (7 – 21 days off roast).