Render a skeleton row matching the resolved tile height while the derived
batch loads so the grid reserves its final footprint with no layout shift.
Hide the section heading until there is content (or a skeleton placeholder)
under it, removing the stranded-heading layout shift on empty data. Surface
an inline error message plus a Retry that refetches the shared batch query
when the batch fails, instead of the whole surface silently vanishing. Mark
the tiles container aria-busy while loading and aria-live polite, matching
the insights a11y pattern.
Only Sleep and Readiness reached a provenance surface; the other nine
shipped a number with the cited standard buried in a code comment. Give
every derived metric a path to its inputs + method + cited standard:
- Recovery, Stress and Strain get a ScoreAnatomyView detail page and a
tappable ring (they were read-only dead-ends). Stress surfaces its
'HRV-derived proxy, NOT an EDA/galvanic measurement' caveat; Strain
cites the TRIMP load model; Recovery the HRV-guided recovery literature.
- The vitals tiles (baseline, HRV balance, BMI, fitness age, vascular age)
gain an info explainer affordance carrying the method + standard, since
they render as tiles with no detail page.
- The coincident-deviation flag gains a dashboard tile (shown only when it
fired) with the same explainer (median ± k·MAD basis).
- A single standards map (src/components/insights/derived/standards.ts)
pins each metric's method copy key, standard name and a real linkable URL
(DOI / WHO / Wikipedia) so the citation a metric exposes stays one source.
Add the per-metric method/caveat/description copy across all six locales.
Map storage units to display symbols so a baseline tile reads '36.6 °C',
not '36.6 celsius'. Show the band word under the strip rings so a value
reads 'low 62', not a bare reddish 62. Drop the empty dashed sparkline
placeholder when no trailing series exists rather than reserving dead
space, and give the tile a series + provenance slot for when one does.
The Insights cold mount fired 14+ independent GET /api/insights/derived
requests — Readiness, Sleep and the vitals baselines are compute-on-visit,
and all of them share one Prisma pool. That is the pool-starvation class
that surfaces as the app hanging then recovering.
Add GET /api/insights/derived/batch?metrics=a,b,c[:type] that resolves the
requested metrics server-side under a bounded p-limit(4) with the profile
loaded once via the shared loadBaselineProfile, returning a map of the same
flat Derived<T> envelope keyed by the request token. Add the useDerivedBatch
hook + the insightsDerivedBatch query-key factory entry; the single-metric
route + hook stay for the per-score detail pages. The single route now also
adopts loadBaselineProfile instead of re-inlining the profile read. Honors
the existing 8s ceiling, retry:0, replace-with-fallback, and warms nothing
on visit. Register the new route in the OpenAPI contract.
The band primitives (score ring, coverage dots, contributor bars,
provenance chips + standard link, sparkline tint, trend arrow/delta)
painted straight from the raw `--dracula-*` variables, which carry no
`:root.light` override. On the white card the Alucard light theme uses,
the green/orange/yellow cleared roughly 1.1-1.5:1 — under AA — and the
`bg-dracula-yellow` confidence dot read near-invisible. The file comment
claimed they 'track automatically'; they did not.
Point BAND_NUMBER/PROGRESS/BORDER/VAR, the coverage-meter dot tint, the
provenance cyan chips, the sparkline stroke, and sentimentColorClass at
the semantic `--success`/`--warning`/`--destructive`/`--info` tokens
instead. Those alias the same Dracula tones in dark mode (pixel-identical
there, the primary target) but carry the darker AA-safe values under
`:root.light`. Clamp the score-ring provisional caption to one line so a
longer localised string cannot wrap over the ring arc.
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