Marc-André BombeckandClaude Opus 4.8 77a652a47c feat(cycle): cycle-phase correlation insight + Coach phase dimension ...

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>

2026-06-06 09:59:02 +02:00

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