Files
HealthLog/docs/api
Marc-André Bombeck 03925ddece feat(insights): time-range pills with period-over-period deltas on metric pages
Add a 7d / 30d / 90d / 1y segmented control to every HealthKit metric page,
between the stat strip and the chart, with a sentiment-coloured "vs prior
period" delta caption beside it.

New route GET /api/analytics/range?type=<MeasurementType>&range=<7d|30d|90d|1y>
returns the current-window aggregate, the previous comparable window, and the
composed delta. Single metric type by construction, so the read is one
rollup-tier call covering the trailing 2N days sliced into the two halves —
no per-type fan-out, no Prisma-pool burst. Reuses the WMY readers
(readBestGranularityRollups + aggregateWmyBuckets) and the two-window pattern
the year-ago baseline already uses; count/min/max/mean/sum compose across
buckets, SD/slope/r2 stay out (not composable). The cached summaries slice is
untouched so the hottest dashboard cache key never fragments.

The delta caption reuses the dashboard's metric-aware up-good/up-bad colour
logic — extracted from trend-card into a shared trend-sentiment module — with
the metric's good direction sourced from the metric-status registry
(target-band metrics render neutral, matching deviation framing). When the
prior window has no data the caption shows "no prior-period data" rather than
a misleading 0%. The range choice persists across metrics via a localStorage
seam and defaults to 30d so nothing regresses. Cache keyed per (type, range)
through the query-key factory.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
(cherry picked from commit eac87a9f8b144f4d8e7a8b950528a19d5dcf8726)
2026-06-02 16:45:14 +02:00
..
2026-05-03 21:53:21 +02:00

HealthLog API Spec

openapi.yaml is the canonical OpenAPI 3.1 description for the HealthLog Next.js API. It is the source of truth for the native iOS client's DTO codegen.

Preview locally

Open an interactive Redoc preview in your browser:

npx @redocly/cli preview docs/api/openapi.yaml

Generate static HTML for sharing:

npx @redocly/cli build-docs docs/api/openapi.yaml --output docs/api/index.html

Validate

npx @redocly/cli lint docs/api/openapi.yaml

The spec is expected to be lint-clean (errors = 0). Some warnings are intentional:

  • no-server-example.com — http://localhost:3000 is the dev server.
  • operation-2xx-response / operation-4xx-response — webhook + redirect endpoints intentionally omit one or the other.
  • no-unused-components — ReminderPhase is exposed for client codegen even though no path response references it directly.

Layout

  • info — title, version (mirrored from package.json), description.
  • servers — production https://healthlog.bombeck.io plus http://localhost:3000 for local development.
  • tags — domain groupings (Auth, Measurements, Medications, Mood, Dashboard, Insights, Achievements, DoctorReport, Integrations, User, Tokens, Notifications, Onboarding, Health, Settings, Analytics, Export, AuditLog, Feedback, BugReport, Monitoring, Webhooks, Ingest, Admin).
  • securitySchemes:
    • bearerAuth — long-lived hlk_* API tokens issued via POST /api/tokens. Required on /api/ingest/medication.
    • sessionCookie — HttpOnly healthlog_session cookie set by the password and passkey login flows. Used by the web app and any iOS client running inside a web view.
  • components.schemas — DTOs for all routes plus the underlying Prisma models (e.g. Measurement, Medication, MedicationIntakeEvent, MoodEntry, User, DashboardLayout, ApiEnvelope, ApiError).
  • paths — all routes from src/app/api/**/route.ts, including the /api/admin/* family which is tagged Admin and marked internal.

Conventions

  • Successful responses use the envelope { data, error: null }.
  • Error responses use the envelope { data: null, error: '<message>' }.
  • Pagination uses limit + offset query parameters and a meta: { total, limit, offset } block on the response.
  • All timestamps are ISO 8601 / RFC 3339 (format: date-time) in UTC.
  • IDs are CUIDs (opaque strings).

Updating the spec

When adding or changing routes:

  1. Update the relevant route handler under src/app/api/**/route.ts.
  2. Mirror the change in openapi.yaml. Keep operationId camelCase and stable — the iOS codegen keys off it.
  3. Run npx @redocly/cli lint docs/api/openapi.yaml and resolve all errors. Warnings are tolerated when documented above.
  4. Bump info.version if the change is breaking for clients.