I've been reading for three weeks and finally made an account. Treating this like a systems rollout: one medication day, one weekly log, one grocery default, no heroic all-at-once rebuild. Starting data: 44-inch waist, 7h12m average sleep, 3,800 steps on desk days. The scale is just one sensor; I'm more interested in the trendline and whether my 4 p.m. snack urge still fires. My first optimization is boring - 30g protein at breakfast, water bottle on the desk, lights out by 11. Previous strategy was vibes with a spreadsheet, which is not a control system. For people further along: which single metric actually changed your decisions? And which column did you eventually delete because it was just decorative anxiety?
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