Add a wellness-scores section to the vitals dashboard: a row of score rings for
Readiness, Recovery, Sleep, Stress, and Strain. Every ring is
data-availability-gated — a score with no underlying data simply does not
render, so the strip never shows an apologetic empty ring. Readiness and Sleep
are tappable and route to their existing score-anatomy detail pages; the
persisted nightly scores render read-only. Every ring reads the one
/api/insights/derived route through the shared useDerivedMetric hook.
Two parallel loaders for the generic derived-metric route had grown — a
components-local hook keyed on a 4-element tuple and a hooks/ hook keyed on a
3-or-4-element tuple. Both shared the ["insights","derived",metric,…] prefix
with different tuple shapes, which silently poisons the TanStack cache between
surfaces. Collapse to the single components-local hook (auth-gated, 8 s client
ceiling, retry-free) on the one insightsDerived factory key; the fourth slot is
always present so the metric prefix can no longer carry two shapes.
Build the composite tier of the derived-metrics layer on the shared seam:
- Sleep score — a transparent 0–100 composite from sufficiency, efficiency,
consistency, timing and composition sub-scores over the per-stage sleep
rows, reweighting around any sub-score the data cannot support (a legacy
asleep-only night drops composition gracefully rather than fabricating it).
- Wellness/readiness index — extends the health-score null-redistribution
blend with resting-HR, HRV (SDNN), sleep, respiratory-rate and mood
deviation-from-baseline components; returns insufficient below two present
components so it never headlines from one signal.
- Coincident-deviation flag — counts vitals outside their personal band on
the latest day and fires when two or more coincide, listing the
contributing vitals as possible factors, never a cause or a diagnosis.
Each composite cites its standard, carries coverage + confidence +
provenance, and reweights around missing inputs.
Add an FDR-controlled correlation discovery engine behind
GET /api/insights/correlations: it scans a curated behaviour x outcome
matrix, lag-joins each behaviour day to the next day's outcome, runs Pearson
with the exact Student-t p-value, and applies Benjamini-Hochberg control
across every tested pair so only statistically-defensible patterns surface —
each tagged with n, r, p and the adjusted q, framed descriptive not causal.
Add the score-anatomy detail view at /insights/scores/<metric>: a full
score ring, ranked contributor rows each showing its push/pull and weight
share, and the cited-standard provenance explainer — reused by every
composite, mobile-first and accessible.
Regenerate the OpenAPI contract for the new metric values + the correlation
discovery response, and add the i18n keys across all six locales.
Build the Apple-Health-Highlights grid of personal-vital tiles on the
Insights overview, backed by four new pure derived-metric compute
functions over the established seam:
- cardio-fitness band ("Fitness Age" frame) — VO2max placed against the
FRIEND-registry age/sex norm (Kaminsky 2015), surfaced + trended, never
re-derived.
- vascular-age delta — Withings vascular-age vs chronological age, a
relative wellness indicator (Vlachopoulos 2010 PWV framing), no medical
claim.
- HRV (SDNN) balance — reuses the typical-range engine for the band and
places the recent average as balanced / above / below; SDNN never
relabelled RMSSD; cadence-gated.
- BMI from weight + height — exact WHO classification, the fallback when
no device BMI exists.
Each metric carries coverage + confidence + provenance and cites its
standard through the provenance explainer. The dashboard renders one
SparklineDeltaTile per available vital: an absent vital does not render,
a still-building one shows the honest coverage meter rather than a
headline from too little history. Tiles read the generic
/api/insights/derived route through a TanStack Query hook keyed off the
centralised factory.
Regenerates the OpenAPI contract for the two new metric ids and adds the
vitals copy across all six locales.
Build the four reusable presentational components the v1.10 vitals and
score-anatomy surfaces share: a radial score ring, a coverage meter, a
sparkline delta tile, and a provenance explainer. Each extends the
existing dracula band + trend-sentiment vocabulary rather than a new
colour system, and ships its populated, provisional/empty, and stale
states up front so a sparse-data surface never goes blank.
- score-ring: centred tabular-nums number on a Recharts RadialBarChart,
band-coloured, size prop (sm tile / md / lg anatomy), count-up + sweep
on mount via a 0 KB requestAnimationFrame hook; role=img aria-label
restates the number so the ring is never colour-only.
- coverage-meter: CSS-only filled/hollow dots driven by the Derived<T>
coverage + confidence facets, with an accessible breakdown tooltip
(present vs required inputs, history days, missing list).
- sparkline-delta-tile: extends the trend-card grammar with an inline
Recharts area sparkline, a signed period delta, and an age/normal-range
framing slot.
- provenance-explainer: collapsible Popover (desktop) / bottom-sheet
(mobile) rendering inputs, plain-language method, and an optional cited
standard as React text children — no markdown library.
All four read their data off the Derived<T> union as a type-only import
so the client bundle stays free of the server graph. Recharts only, no
new runtime dependency. New i18n keys propagated across all six locales.
Marc-André Bombeck