`instant.toISOString().slice(0, 10)` and parsing a key back as UTC
midnight are the idioms behind every day-boundary fix this year: the
evening west of UTC and the small hours east of it land on the
neighbouring day. A new rule, healthlog/no-utc-day-key, refuses them in
src/ outside src/lib/tz and tests, and refuses a disable directive for
itself that is not next-line or gives no reason.
The time zone module now names every legitimate form: userDayKey for a
person's day, dateOnlyKey / dateOnlyAtNoonUtc / dayKeyAsUtcMidnight for
date-only values and day labels, daysBetweenDateKeys / weekdayOfDateKey /
isCalendarDateKey / statedDateKey for key arithmetic and parsing.
Of the 133 sites the rule found, 84 are gone. Most moved onto a named
helper with no change in behaviour; these changed behaviour:
- cycle calendar, insights, Coach snapshot and prediction refresh start
their lookbacks at the first instant of the user's day
- a model-transcribed date like "June 10, 2026" no longer lands a day
early in a process east of UTC (documents and lab scans)
- a custom report range covers exactly the picked days in the profile
zone instead of starting the evening before west of UTC
- date-of-birth pickers cap at the user's today, not the UTC one
- an allergy onset date is stored at noon UTC like other date-only values
- the report's cycle summary, the Coach's usual BP range and the intake
projector's rollup recompute use the user's day
- vaccination dates render as dates instead of the previous evening
49 remain, each with its reason on the line above: 39 UTC by design (15
file name stamps, rollup and object keys, the UTC-day score engines) and
10 marked baseline. A guard test requires a classified reason on every
directive and holds the baseline to a ceiling that only goes down.
`binaryReferenceSex` was already the declared owner of the shrink from the
three stored values to the two a sex-split reference table has rows for, but
eight sites still narrowed inline — including a byte-for-byte private copy in
the effective-range resolver and a ternary 37 lines above a `toProfileSex`
call in the same file. Each of those is a place the fallback can drift.
Delete the copy, replace the ternaries, and name the pair once as
`BinaryReferenceSex` so a signature that needs it stops re-listing the two
literals. No behaviour changes: every site already resolved OTHER and "no
answer" to the same neutral or absent value, and the existing suites pass
untouched.
The water quick-add validated calendar realism but never the upper day bound the
batch route applies, so a far-future day was accepted and — every read filters
`day >= since` with no ceiling — became the permanent latest day on the settings
card and the dashboard tile. Hoist the bound into one shared helper both routes
use.
`mode: "add"` bounded a single request to the catalog's plausible daily max but
nothing across requests, so repeated quick-adds drove the stored total
arbitrarily high while the batch route enforced the same cap strictly. Clamp
after the increment so the write stays atomic.
Thiamin's cap sat at exactly 1000 mg while its PRI is exactly 1.0 mg, so a
microgram-read-as-milligram sample landed on precisely the cap and the `>`
comparison let it through. 500 still clears any real supplement dose.
NutrientIntakeDay was in no export path, which contradicted the schema's own
reason for denormalising the unit column. Carry it in the full backup with its
unit and source — source is part of the composite key, so without it a restore
cannot tell a manual entry from a synced day total.
NutrientIntakeDay's composite primary key gains `source` (migration
0249_nutrient_intake_day_source): a manual water entry and the
Apple-synced day total now live as two rows instead of the manual
write being silently clobbered by the next Apple last-writer-wins
sync. Every existing row already defaults to source=APPLE_HEALTH, so
the migration is a pure PK-constraint change with no data rewrite.
- POST /api/nutrients/batch keeps writing the APPLE_HEALTH row,
byte-identical upsert semantics against the wider key.
- GET /api/nutrients sums amounts within (nutrient, day) across
sources before folding into the window summary.
- POST /api/nutrients/water (new): manual water quick-add, add/set
modes against the MANUAL row only, module-gated, rate-limited,
idempotency-key aware, hard-evicts the dashboard snapshot cache.
- GET /api/nutrients/daily (new): dense per-day series for one
nutrient (summed across sources) plus the EFSA reference resolved
against the caller's profile sex — omitted when sex is unknown.
- catalog.ts gains resolveNutrientReference(), the sex-resolution
helper both new routes and the insights cards share.
docs/api/openapi.yaml regenerated for the two new routes.
Supplement-style intake written to Apple Health by nutrition apps —
vitamins, minerals, water, caffeine — can now sync as daily totals into a
dedicated NutrientIntakeDay store (migration 0241): composite (user, day,
nutrient) identity, re-post replaces, no soft delete, no rollup coupling.
A code-side catalog carries the 26 nutrient codes with canonical units,
plausibility caps, and EFSA dietary reference values (direction-aware;
chromium cites NIH ODS where EFSA declined a DRV).
Deliberately not a nutrition feature: no diary, no calories, no dashboard
surface. POST /api/nutrients/batch is gated behind the new opt-in
nutrients module (default off — with the module off the server refuses
ingest entirely), rate-limited, idempotency-wrapped, with per-entry
unit-mismatch and out-of-range skips. GET /api/nutrients serves a
catalog-ordered summary; the only visible surface is a read-only card
under Settings → Sources. Coach/correlation access is a later slice; the
iOS reading side is coordinated in the companion-app tracker.
Marc-André Bombeck