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Long-term retention for the dense intra-day tier (PULSE, HRV, SpO2) folds to per-local-hour means instead of a single daily mean: the last 14 days keep every raw sample, older days keep up to 24 points per metric — the day's shape survives permanently at ~9k rows/metric/year. Hourly rows key as stats:<HK>:<YYYY-MM-DD>T<HH> anchored at local HH:30, adopt-in-place against both unique indexes with the P2002 retry outside the transaction. The pre-fold DAY-rollup recompute extends to HRV (mean fidelity, not only min/max) and the post-fold recompute is gone for the whole tier. Derived resting rows for proxy users still mint from the day's raw samples. A one-shot rebuild reconstructs the hourly shape for every already-folded day from the soft-deleted raw samples and retires the daily row in the same transaction — at no instant are both grains live, so no AVG-over-live-rows reader can double-count. Boot discovery pairs live daily-grain rows with surviving tombstones (parameter-bound SQL, pinned against real Postgres) and converges to zero once converted; days whose tombstones were pruned keep their daily mean. PULSE/SpO2 DAY buckets keep the true pre-fold stats; HRV DAY buckets recompute from the hourly rows (strictly better than the collapsed fold-time bucket); WEEK/MONTH/YEAR respans enqueue whole-bucket recomputes.
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.
The MCP server is documented separately — it is a distinct contract over JSON-RPC, not part of the REST OpenAPI spec:
mcp-capabilities.md— the tool, resource, and prompt catalogue, the grounding contract, and the write model.mcp-skills.md— building a connector or skill on top of it.../self-hosting/mcp.md— enabling and connecting the surface (operator guide).
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:3000is the dev server.operation-2xx-response/operation-4xx-response— webhook + redirect endpoints intentionally omit one or the other.no-unused-components—ReminderPhaseis exposed for client codegen even though no path response references it directly.
Layout
info— title, version (mirrored frompackage.json), description.servers— productionhttps://healthlog.bombeck.ioplushttp://localhost:3000for local development.tags— domain groupings (Auth,Measurements,Medications,Mood,Dashboard,Insights,Achievements,DoctorReport,Integrations,User,Tokens,Notifications,Onboarding,Health,Settings,Analytics,Export,AuditLog,Monitoring,Webhooks,Ingest,Admin).securitySchemes:bearerAuth— long-livedhlk_*API tokens issued viaPOST /api/tokens. Required on/api/ingest/medication.sessionCookie— HttpOnlyhealthlog_sessioncookie 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 fromsrc/app/api/**/route.ts, including the/api/admin/*family which is taggedAdminand marked internal.
Conventions
- Successful responses use the envelope
{ data, error: null }. - Error responses use the envelope
{ data: null, error: '<message>' }. - Pagination uses
limit+offsetquery parameters and ameta: { 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:
- Update the relevant route handler under
src/app/api/**/route.ts. - Mirror the change in
openapi.yaml. KeepoperationIdcamelCase and stable — the iOS codegen keys off it. - Run
npx @redocly/cli lint docs/api/openapi.yamland resolve all errors. Warnings are tolerated when documented above. - Bump
info.versionif the change is breaking for clients.