Three silent gaps in the import accounting, one commit:
The reproductive samples of an export land in recordsRead but were
discarded without a counter when cycle tracking is off — the result now
names them (samplesSkippedModuleDisabled). A cycle flush that failed
partway zeroed its stats AFTER day-by-day writes had landed; the flush
is now fault-isolated per day and reports daysFailed plus the first
failure reason instead of claiming nothing happened. And the import
card hardcoded skipped: 0 while the worker has computed, persisted and
served per-class skip counters since v1.15 — it now renders them,
splitting deliberate exclusions (unsupported and deferred types, a
disabled cycle module) from genuine refusals (unparseable, out of
range, failed writes), with a per-type breakdown. Only refusals tip
the outcome tone.
The constants make ovulation minus five through ovulation plus one, and
the comment above them claimed a six-day window. Wilcox's six days are
the five before ovulation plus the day itself, measured against a KNOWN
ovulation day. Ours is estimated, usually by back-calculating a luteal
length from a median cycle, so a window drawn tight to the estimate
loses its last day whenever the estimate lands early, and the ovum stays
viable for most of a day after release besides.
The direction is decided by who reads the window. It is surfaced to
people trying to conceive and to people avoiding it, and for the second
group a window one day short is a window that misses. The constants keep
the conservative reading and the comment now states it, with the note
that changing either one is a coordination matter because the iOS client
reimplements the same spec.
The width is pinned by a test rather than left to be re-read off the
numbers the code already uses.
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
The cold-start gate suppresses the calendar's phase band until three
cycles are observed, because a population-framed phase word off one or
two of them is not earned. The verdict read the day count off those same
labels, so the gate took the count with it: a record holding three
logged period starts resolved INSUFFICIENT_DATA and rendered an empty
ring under an offer to log a first period.
The count is not the claim the gate is about. It is the number of days
since a start the person entered themselves. The verdict now takes that
start from the cycle rows and falls back to counting from it whenever
today carries no phase, with the same overdue ceiling and no phase
claim. INSUFFICIENT_DATA is left for the case that really is one: no
period start on record at or before today.
The sheet's day header was already written for this state and could
never reach it — it renders a bare day number when no phase is
trustworthy.
- verdict round trip covers the still-learning day count and its overdue
side through the real route
- unit tests pin the anchor path, the absent-from-grid path, and that a
future-dated start is not a cycle anyone is in
A GET must not have side effects — api-handler.ts says so next to
READ_HTTP_METHODS, where an MCP-audience token is admitted on the safe
methods precisely because they are assumed to write nothing. Three routes
broke that: the sync handshake bumped User.lastSyncedAt, the achievements
read inserted unlock rows, and the cycle calendar fired a discarded promise
at the forecast cache so a failed write left no trace anywhere.
Each write moves to the place that causes it.
The sync checkpoint is now stamped by the batch ingest endpoints for
measurements, mood and intakes. The handshake reports it. That also fixes
the watermark: the checkpoint used to advance past a window the client had
not drained, and a client trusting it would skip that window. It can only
trail a real sync now.
The unlock rows move to a nightly achievement-unlock-sweep. The badge grid
never needed them — unlocked comes from the live metrics and the completion
date is derived — so the payload is unchanged; the rows pin that date and
carry it into the backup, and the sweep reaches accounts that never open
the page.
The cycle forecast moves to a nightly cycle-prediction-refresh. The
CyclePrediction row is not a cache of a read: it is the index the reminder
cron scans, so which reminders an account received depended on whether
somebody had opened the calendar. persistPredictionCache no longer
swallows its errors either — the job reports them.
Three checks. The engine tests pin the overdue boundary from both sides:
day 42 of a stated 28-day cycle still counts, day 43 stops counting and
reports fifteen days later than usual.
The round-trip test calls the real GET handler, reads the response body as
text and parses it, so a field that both ends handle but the wire never
carries fails here. It runs the same instant twice for two accounts in
different timezones and gets two different answers, which is what the
account timezone is for. It also checks the ring's cycle day against the
phase engine the coach read uses, so the two cannot tell someone two
different days.
The guard reads the syntax tree of every file under components, hooks and
app, and fails on a grace-period constant, on an overdue verdict computed
rather than read, and on a cycle-day count compared against a sum. It
follows local bindings, so lifting the threshold into a variable above the
comparison does not hide it. A companion suite tries nine disguises against
the same detector and pins five innocent shapes it must ignore, including
an overdue medication dose.
On a German metric page the strip printed its own summary in German and
the pattern line under it in English. The pattern line is a finished
sentence the server writes, and the route never told the server who was
reading, so it wrote English.
The route now resolves the reader's language the same way the
correlations and analytics routes do and passes it down. The language is
a required argument the whole way through — it used to be optional with
an English fallback, which is why a caller could stay silent and still
get a sentence back. The cycle page's lagged rows had the same gap and
are fixed with it.
The strip's browser cache is keyed by language too, so switching
language no longer re-uses the sentence written for the previous one.
A cycle symptom can be recorded with a 1-4 intensity. The log-day sheet
writes it, the day-log reads it back, and the backup never carried it:
the file held the symptom keys and nothing else. Export a day recorded
as "cramps, and they were a 4", restore it, and you get "cramps". The
symptom is there, the number is gone, and nothing fails, which is why
nobody noticed.
The file now carries `symptomSeverities` alongside `symptomKeys` — one
entry per symptom that was actually rated. `symptomKeys` still decides
which symptoms a day had, so a release that only knows that field reads
every symptom out of a new file unchanged, and the two lists can never
disagree about presence. A link nobody rated is simply not listed: no
entry means never rated, which is not the same as rated zero.
A file written before this restores exactly as it did, with every
intensity absent rather than invented. An intensity outside 1-4, from a
hand-edited file or some later scale, costs that one number and leaves
the symptom and the rest of the restore alone.
restoreCycleData was loud about one missing reference and silent about
another, three lines apart. An unknown cycle reference threw; an unknown
symptom key was filtered out of the list, so the day-log came back with one of
its symptoms quietly gone and the restore reported success.
The cause was upstream: the seeded catalogue is reference data every instance
has, but a symptom the user created lives only in their account and was never
carried. The key had nothing to resolve against, and the filter turned that
into silence.
Both ends now. The account's own definitions travel with the backup, the
seeded rows deliberately do not — shipping those would let one instance's
restore rewrite another's reference data. And the resolve step throws on an
unresolvable key rather than filtering it, so the same function answers the
same question the same way twice.
Widening the builder's client type made four export tests fail on a missing
delegate, which is the sweep working: those are the call sites, named by the
compiler instead of found by reading.
A partial-update upsert soft-decrypted the existing encrypted column,
returned null on failure, then re-wrote it — so editing an unrelated
field permanently nulled an undecryptable note or sensitive envelope.
Preserve the existing ciphertext verbatim when the encrypted field is
absent from the update; only re-encrypt on an explicit field write.
Mirrors the v1.18.1 rotation fix.
One-shot prettier pass so the new format:check gate starts from a clean
baseline. Formatting only — no behaviour change. Generator-owned and
vendored artifacts stay untouched via .prettierignore.
The cycle gate checked only the per-user toggle and gender, never the
operator server-wide availability layer. With the Cycle module turned off
by the operator, /api/cycle/* kept serving, the coach injected the cycle
block, the Apple-Health importer kept writing cycle rows, and the
cycle-reminder cron kept firing CYCLE_PERIOD pushes — while nav and the
doctor report already honoured the operator switch.
Add isCycleAvailableForUser, which delegates to isModuleEnabled(userId,
"cycle"): the cycle ModuleKey resolves the per-user toggle AND the
operator availability map, so there is one source of truth and no
duplicated operator logic. Route requireCycleEnabled, the coach cycle
block, and the import accumulator through it; switch the cron to the
injectable isModuleEnabled gate, matching the mood and measurement
reminder crons, and add a skippedModuleDisabled counter. Correct the
cron comment that claimed isCycleEnabled was itself the module gate.
isCycleEnabled stays the pure per-user (user-layer) resolver the module
foundation AND-s at layer one.
Tests: assert requireCycleEnabled returns a 403 cycle.disabled envelope
and the cron skips the push when the operator turns the module off.
Below three observed cycles the prediction is a population-prior guess, not a
data-grounded estimate. The web calendar already hid the fertile window and
predicted ovulation in that state; make the gate structural in the DTO mapper
so iOS — and any client reading prediction.* directly — cannot paint a window
the rest of the app refuses to show. ovulationConfirmed stays goal-gated only:
a confirmed shift is observed data, not a prior.
Let a user pick the Sensiplan double-check's second indicator — cervical
mucus (default) or cervix observation — mirroring the published NFP
standard where the temperature primary sign pairs with one chosen
secondary sign.
- `CycleProfile.secondarySymptom` (MUCUS default | CERVIX) drives which
second sign the engine confirms against. Casual users keep temperature
+ mucus untouched; the choice lives behind the advanced cycle settings.
- `CycleDayLog` gains the three standard cervix signs — position
(LOW/HIGH), firmness (FIRM/SOFT), opening/os (CLOSED/OPEN) — as nullable
columns (migration 0157), wired through Zod, the day-log upsert, the
DTO, the sync feed, backup/restore and OpenAPI. Additive and
back-compatible: existing profiles backfill MUCUS, existing day-logs
keep NULL cervix signs, iOS inherits the fields.
- The engine's `confirmSymptothermal` takes the secondary-symptom choice;
on CERVIX it confirms against `detectCervixPeak` (last fertile-cervix
day followed by three closed days — the cervix-closure rule) instead of
the mucus peak. The double-check still requires BOTH the temperature
shift AND the secondary peak: a single cervix sign never confirms, and
the still-learning gate and conservative posture are unchanged.
Engine derived clean-room from the Arbeitsgruppe-NFP / Raith-Paula &
Frank-Herrmann standard.
A stored positive ovulation test (LH surge) was ignored by the
predictor. Wire it in as a Marquette/Fehring anchor: a positive surge
predicts ovulation ~24-36h later, so the estimated ovulation is set one
day after the last positive LH test in the current window, sharpening the
estimate over the calendar back-calculation — most valuable in the
thin-data (<3 cycle) case where the median/luteal back-calc is weak.
The LH surge is a SIGNAL that refines, never a sole assertion: it
re-anchors the still-estimated ovulation but never flips
`ovulationConfirmed` (a single indicator is not the symptothermal
double-check), and a confirmed symptothermal/temperature-trend ovulation
always wins over it. The still-learning gate and the un-confirmed status
are preserved. A stale prior-cycle surge whose next-start lands in the
past is rejected.
Citation: Fehring R.J. — Marquette Method; urinary LH peaks ~1 day before
ovulation.
A fever, illness, alcohol or a late/short-sleep reading can fake or mask
a temperature rise. Add a per-day `temperatureExcluded` flag on
CycleDayLog (migration 0156): when set, the engine drops the reading from
the cover-line baseline AND the shift evaluation, so a spike neither
fabricates nor masks a rise (Sensiplan: the cover line is drawn over the
last six unbracketed values).
Wired end to end — schema + Prisma, the engine's `detectTempShift`
filter, the Zod input/patch schemas, the day-log upsert (partial merge +
change detection), the read DTO, the calendar/insights/coach selects, the
backup round-trip, and the OpenAPI contract (a new boolean on the day-log
and calendar-day DTOs for the iOS client). The log-day sheet gains a
"mark reading as disturbed" toggle that appears once a temperature is
entered, translated across all six locales.
Citation: de.wikipedia "Symptothermale Methode"; myNFP "Temperaturkurve
auswerten" — Störfaktor bracketing.
The mucus peak was taken as the last egg-white/watery day with no
confirmation, so a stray late fertile-mucus entry corrupted the peak.
Implement the Sensiplan Höhepunkt rule: the peak day is the LAST
best-quality (egg-white/watery) day that is followed by at least 3
consecutive drier observed days, each strictly lower quality. The peak is
only confirmable retrospectively, after those 3 days, so a stray late
egg-white entry not yet followed by 3 drier days cannot move an
already-confirmed peak. Quality is scored on the t/f/S/+S ladder;
unobserved days are skipped so a logging gap does not break the count.
Citation: Arbeitsgruppe NFP / Raith-Paula & Frank-Herrmann; myNFP
"Zervixschleim beobachten".
The BBT shift detector only applied the strict 3-over-6 rule (3 readings
above the cover line, the 3rd >=0.2C above), so it under-detected
ovulation on common ovulatory patterns. Add the two published
Ausnahmeregeln:
- 1. Ausnahmeregel (slow/staircase rise): when the 3rd high reading is
above the cover line but not >=0.2C above, a 4th reading that need
only be above the line confirms the shift.
- 2. Ausnahmeregel (one value falls back): when exactly one of the three
readings falls back to/below the cover line, it is discounted and a
4th reading that again clears 0.2C above the line confirms.
The result now carries a `rule` (0|1|2) provenance field and the
`evaluationCompleteDate` (evening of the 3rd or 4th high reading). The
rules follow the Arbeitsgruppe NFP / Raith-Paula & Frank-Herrmann
standard and are mutually exclusive by construction.
The hard upper bound clamped cycle lengths at 45 days, force-excluding any
longer cycle as an outlier before the robust statistics ran. Cycles over 35
days are oligomenorrhea but still real, and adolescent and perimenopausal users
routinely run to fifty days or more — exactly the irregular users for whom an
honest estimate matters most. Clamping their genuine cycles biased the estimate
toward the population middle.
Raise the ceiling to 60 days. It stays a coarse gross-error backstop; the
median-plus-MAD fence and the missed-log heuristic still do the real outlier
work, and because the fence is computed before exclusion, raising the ceiling
does not move it — it only stops the hard rule from pre-empting the fence on
long but consistent cycles.
The predictions panel suppressed its fertile-window and ovulation rows while
fewer than three cycles were observed, but the month calendar did not — so a
brand-new user who logged a single period saw the grid paint a confident
fertile-window shading, a predicted-ovulation dot, and full phase bands off a
population 28/14 prior at ~0.20 confidence. Calendar-based fertility estimation
is unreliable below several recorded cycles, so the grid was asserting days it
could not know.
Thread the same still-learning gate into the calendar build: while fewer than
three cycles are observed, suppress the fertile window, the ovulation dot, and
the phase band (the predicted-period bar stays, mirroring the panel). Surface a
top-level stillLearning flag on the calendar response so the client renders a
calm "learning your cycle" banner over the grid instead of a bare, falsely
confident calendar. The flag is additive and back-compatible; older clients
ignore it and degrade to the previous render.
Also pin the observed-cycle count to a single source — the engine's
post-exclusion value — so the response never carries two divergent counts.
Mirror the v1.13 custom-mood-tag CRUD for cycle symptoms. A user can mint
their own symptoms beyond the 15 seeded ones, picked from a label + icon
popover via a dashed ghost-chip in the log-day sheet's symptom grid.
- POST/GET /api/cycle/symptoms/custom and PATCH/DELETE on /[key]: mint a
custom:<uuid> key, encrypt the free-text label at rest (AES-256-GCM),
per-user cap, owner-scoped, gated behind requireCycleEnabled. Soft-hide by
default, hard-purge on ?purge=true.
- The day-log write already resolves a symptom key against the catalogue plus
the caller's own rows, so a custom: key links by construction.
- The log-day sheet fetches the user's customs and merges them under a new
custom category in the chip grid; the ghost-chip + popover reuse the chip
styling and the Lucide icon set.
- Seed the global custom symptom category (migration 0134).
- The purge route (DELETE /api/cycle/all) now drops the user's custom symptom
rows too, so no intent-revealing label survives a purge.
- The label is never logged: only the icon + counts reach annotate/auditLog.
- i18n: cycle.symptom.custom.* across all six locales.
Add the cycle-native counterpart to the phase×vitals crosstab: for each
logged symptom, where in the cycle it clusters. A pure aggregator tallies
each symptom's occurrences across the phase-labelled days (the same phase
map the calendar uses), surfaces only symptoms logged on at least three
phased days, and reports per-phase counts + the dominant phase + its
share. The insights tab renders it as a proportional phase-hued bar with
the dominant phase named in words (never colour-only), observational and
never causal.
Also correct the phase-crosstab OpenAPI row enum, which had drifted
behind the runtime (mood + glucose channels were missing).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The symptothermal layer ran against the full day-log history: detectTempShift
returned the earliest 3-over-6 rise and detectMucusPeak the last egg-white day
across all cycles, so a multi-cycle user with historical BBT confirmed a
months-old ovulation and the predicted next-period start landed in the past.
Scope the temperature/mucus detectors to the current cycle window
[lastConfirmedStart − BBT_WINDOW, today], take the latest qualifying temp shift,
and reject any confirmation whose next-start is already in the past.
Resolve luteal length through a single clamp. The predictor clamped to [10,16]
while the calendar adapter and phase mapper used the raw stored value, so the
ovulation dot and the OVULATORY band could land on different days for an
out-of-clamp profile. Export resolveLuteal/clampLuteal, route buildCalendar,
buildPhaseCycles and phaseForDay through it, and tighten the profile-prefs Zod
bound to the same [10,16] range.
Show the fertile window for AVOID_PREGNANCY as well as TRYING_TO_CONCEIVE per the
algorithm spec; it stays hidden for GENERAL_HEALTH/PERIMENOPAUSE.
Bound the day-log reads on the calendar and insights routes to the rendered span
plus the symptothermal lookback instead of the full history; cycle-length stats
already run off the MenstrualCycle rows.
Add mood and blood glucose as phase-crosstab outcome metrics under the same FDR
and per-group day floors. Mood is read from MoodEntry and injected as a synthetic
channel since it is not a measurement row.
Add multi-cycle, luteal-clamp and fertile-window fixtures.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Promote the reproductive HealthKit category types out of the
Apple-Health-import privacy-hold list and route them into cycle day-logs
instead of measurements, and surface cycle data on the three export
surfaces.
Import promotion:
- A new HealthKit -> cycle mapping module is the single source of truth for
how MenstrualFlow, IntermenstrualBleeding, CervicalMucusQuality,
OvulationTestResult, SexualActivity, PregnancyTestResult,
ProgesteroneTestResult, Contraceptive and the symptom category types fold
into CycleDayLog fields / seeded symptom keys. The XML importer
accumulates same-day reproductive samples and writes one canonical
day-log per day with source APPLE_HEALTH and a synthetic per-day
externalId for idempotent re-import. The fold is gated on cycle tracking
being enabled, so a non-cycle export never provisions cycle rows. A
contraceptive method nudges the profile goal toward avoiding pregnancy
only when the goal is still on its default. Basal body temperature stays
a measurement and mirrors onto the day-log. Pregnancy/Lactation status
and the pregnancy-bleeding types stay deferred; the cycle awareness types
remain server-derived.
Export:
- FHIR emits LMP (LOINC 8665-2), average cycle length (64700-8), period
length (64698-4) and the current phase as opt-in reproductive-health
observations grouped into their own document section.
- The doctor PDF gains an opt-in cycle section (recent cycles, average
length and variability, current phase), privacy-default off like mood.
- The full-backup export, the weekly backup worker and the off-host DR
snapshot include the cycle tables, and the admin restore re-creates them;
the day-log note round-trips as ciphertext and is never decrypted onto a
report surface.
Mapping table documented in docs/api/cycle-healthkit-mapping.md. Adds unit
+ integration coverage for the mapping, the import routing, the FHIR
observations and the backup round-trip. OpenAPI regenerated. Six-locale
strings added.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add the menstrual-cycle phase as a channel in the existing FDR-guarded
correlation machinery, the same way rated mood factors were folded in —
no new statistics, the same Welch + Benjamini-Hochberg pipeline, the same
day floors and q = 0.10 gate.
Two complementary mechanisms, both confined to a gender-gated surface:
- a categorical luteal-vs-follicular contrast per outcome metric (resting
heart rate, HRV, sleep, steps, weight, basal/wrist/skin temperature),
surfacing one headline finding (resting-heart-rate-by-phase, falling
back to HRV); and
- the continuous phase ordinal folded into the lagged-Pearson matrix.
Phase never reaches the general correlations route — the temperature
channels held out of the general matrix are un-blocked only here, behind
the cycle gate, so a reproductive inference can never leak onto a
non-gated surface. Every row shows n, effect size, p and q; nothing is
fabricated on thin data and nothing is framed as causal.
Surface it through a new gated GET /api/cycle/insights and a drop-in
card that mirrors the mood-factor crosstab.
Add a cycle dimension to the Coach snapshot: current phase + day-of-cycle,
the next predicted event (period range + confidence + method, fertile
window goal-gated), and the headline phase finding — present only for a
cycle-enabled account, so a non-cycle snapshot is unchanged. A new ground
rule keeps the Coach descriptive: never contraception-grade, never a
"safe day" claim.
OpenAPI regenerated; phase-correlation + snapshot-inclusion tests added;
copy localised across all six locales.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add the `/api/cycle/*` capture, calendar, history, and settings routes
plus the offline-sync delta extension for the v1.15 cycle-tracking
feature, all against the locked iOS contract.
- Enable flag: add nullable `cycleTrackingEnabled` to CycleProfile
(migration 0132). A null toggle derives from gender (FEMALE → on).
`isCycleEnabled()` is the single gate resolver; every `/api/cycle/*`
route 403s `{ errorCode: "cycle.disabled" }` when off. The resolved
flag surfaces additively on GET /api/auth/me.
- Routes (apiHandler + Zod + envelope + gate + annotate + auditLog):
POST/PATCH/DELETE day-logs (single), POST day-logs/bulk (idempotent,
capped 500, rate-limited 60/min, per-entry inserted/updated/duplicate/
skipped), POST period boundary, GET calendar (runs the deterministic
engine, debounced stale-while-revalidate cache, goal-gated fertile
window), GET cycles (history + median/MAD stats), GET profile,
DELETE cycles, PATCH /api/auth/me/cycle-prefs (deep-merge).
- Day-log note encrypts at rest (notesEncrypted); intent fields stay
queryable plaintext. Upsert keys on (userId, source, externalId) when
externalId present, else (userId, date).
- Offline sync: extend GET /api/sync/changes + the cursor with the
`cycleDays` + `cycles` domains (CURSOR_VERSION → 2). cycleDays
tombstones key on externalId else id; cycles on id.
- OpenAPI: register every route + DTO; regenerate the committed spec.
- i18n: cycle prediction disclaimer across all six locales.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Pure, DB-free cycle prediction and phase-assignment engine under
src/lib/cycle/. The math mirrors the offline-parity spec exactly so the
server and the native client compute byte-identical forecasts from the
same canonical inputs.
- day-math: noon-UTC anchored YYYY-MM-DD arithmetic (dayDiff, addDays,
round-half-up) that stays stable across timezones and DST transitions.
- prediction: robust median+MAD cycle-length estimator over a trailing
12-cycle window with 3-MAD outlier exclusion and missed-log detection;
period-length estimator; one-sigma Low/High date band widened by
logging sparsity; luteal back-calculated ovulation + six-day fertile
window; the CALENDAR -> symptothermal -> temperature-trend method
ladder (sensiplan 3-over-6 + mucus-peak re-implemented from the
published method) with documented blend precedence; a multiplicative
confidence scalar shrinking with length variance, low cycle count, and
sparse logging.
- phase: day-of-cycle -> MENSTRUAL/FOLLICULAR/OVULATORY/LUTEAL boundary
mapping with menstrual precedence on overlap.
- 48 unit tests covering the regular, irregular, cold-start, outlier,
symptothermal, temperature-trend, and every phase-boundary case; all
assertions are timezone-independent and pin exact dates + confidence.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
