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Marc-André Bombeck
3596720905
MenstrualCycle rows were only ever written by the one-tap period boundary. Every other way of recording bleeding wrote a day-log and stopped there: the log sheet's flow chips, the bulk drain, an Apple Health export full of menstrual-flow samples. The engine reads cycle rows, so a person could log every period they had and the module still held that none had happened. No cycle length, no forecast, an empty chart, and an offer to log a first period. An Apple Health user who never found the one-tap button had the whole module dead. A first bleeding day now opens the cycle it belongs to, through one shared seam in the day-log write helper, so the single capture, the bulk drain and the Apple Health fold all infer a start the same way and the one-tap boundary's own write lands on a date that already has a cycle, which the rule declines. The rule is conservative, because a false start corrupts every length derived after it. Spotting does not open a cycle: it is as often the tail or the herald of a period as its first day. Bleeding flagged as between periods does not, since that flag exists to say so. Neither does a bleeding day within the hard physiological minimum of an existing start, which is what keeps day three of a period, or a forgotten day two, from starting a cycle of its own without needing a contiguity check. A genuinely short cycle is not inferred from flow alone; the one-tap start still opens one on any date. An edit is symmetric. Setting a flow opens the cycle; clearing it, or flagging it as between periods, removes the cycle that day opened and re-opens the one before it. A cycle that an edit can create and not undo leaves the record holding a period nothing on the day says happened. - the period route's start arm and the flow inference now share one boundary helper, so a start means the same thing however it is entered - back-dating re-anchors both neighbours, as the one-tap start does - integration: eleven cases through the real routes, of which five are about what must NOT open a cycle