About a dozen hand-rolled spreads each picked population or sample
variance without saying so, and the two surfaces a person compares
picked differently: the series API reported the population SD of a
blood-pressure series, the MCP tools and the AI payload the sample SD of
the same readings, about 22 % apart at three readings.
`lib/stats/spread` holds `variance` and `standardDeviation` with an
explicit `population | sample` kind and `READING_SPREAD`, the kind every
surface uses to report the spread of a person's readings. The series
route and the feature payload both report it; the spreads that feed a
verdict (the normal-swing checks, the changepoint threshold) and the
clinical glucose SD stay the sample estimate, now said out loud. A guard
fails on a new hand-rolled spread and on the two surfaces drifting apart.
The knip blind spot (ignoreExportsUsedInFile) left eight symbols carrying
an export nothing outside their file consumes — the modifier goes, the
symbols stay. The score series module goes whole: its only importer was
its own guard test, whose composite- and config-guarding suites survive
in place.
DocumentContentIndex.tokenizerVersion gains the consumer that was the
point of storing it: the content-index job now re-tokenises rows whose
version trails CONTENT_TOKENIZER_VERSION, from the decrypted index text
along the same path the rotation script uses, keyset-paginated and
fault-isolated per row — a future tokenizer bump migrates the index
instead of silently splitting it. ImportJob.uploadSha256 turned out to
already have its dedupe consumer (both kick-off routes short-circuit on
same-bytes non-failed jobs); its comment now names that instead of
pretending to be write-only. The remaining write-only columns carry
their honest annotations in the shape the audit sweep parses.
The app carries three scores and meant two things by a green dot.
Readiness and the sleep score both call 70 green; the health score alone
wanted 75. One app cannot do that, so the outlier moved. The yellow floor
stays at 50: raising the bar for a reward and lowering the bar for a
warning are different decisions, and only the first one was on the table.
The band is still not a function of the number. The composite takes the
worse of the mean's band and the worst counted pillar's, so a composite
carrying a red pillar stays red however high the mean sits - the stored
band on a recorded day exists for exactly that reason. Only the mean-side
thresholds moved.
The method version moves with it. A day already recorded keeps the band
it was actually shown under, and the notice key carries the version, so
each account is told once that the rules moved. The week-over-week
comparison is left alone on purpose: the number itself does not change,
only the colour it is drawn in, so a subtraction across the change still
compares two numbers worked out the same way.
Marc-André Bombeck