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HealthKit's API does not surface a stream of deleted UUIDs, so the iOS
HealthLog client performs a periodic 30-day reconciliation: it diffs
HealthKit's current UUID set against the server's externalIds and
posts the surplus here. This endpoint deletes the user's matching
rows and never touches another user's data (Prisma's deleteMany with
the userId predicate is the cross-user 404 guard).
Contract:
- Body: { externalIds: string[] } with min 0, max 500 entries.
- Auth: requireAuth() — session cookie or bearer.
- Empty array: returns { deletedCount: 0 } with 200 (no-op, not a
failure — matches the ingest path's symmetric tolerance).
- Over-cap: 422 with errorCode "measurement.delete.too_large" so
the iOS client can surface a specific diagnostic.
Integration coverage: happy path, cross-user 404 guard, empty array,
and batch-cap rejection. The cap (500) mirrors POST /measurements/batch
so the two surfaces share one operational ceiling.
OpenAPI: registered as DELETE on /api/measurements/by-external-ids
with the Measurements tag; req/res schemas reuse the same z.array cap
the runtime validator enforces. openapi.yaml regenerated.
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: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,Feedback,BugReport,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.