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The Local provider speaks the standard JSON wire: response_format by default, one self-healing fallback per endpoint when a server rejects it (dialect cached per base URL) — LiteLLM, OpenRouter, vLLM, LM Studio and plain Ollama all work from the same form, and the form + provider docs now say so. A gateway that shims a Claude-family model behind a synthesized tool call is parsed from the tool-call arguments instead of yielding silently empty insights. The insight token budget is configurable (INSIGHTS_MAX_TOKENS, default 2500, clamped 500-8000) and unified across all six call sites; a reply cut off mid-JSON returns a distinct truncation error instead of a generic parse failure. A briefing withheld by the number-grounding check now says so on the card instead of pretending nothing was generated. The provider test button answers 4xx with a bad_request category instead of claiming the endpoint was unreachable. Sleep repair follow-up: measurements carries a second full unique index — the natural key (type, measured_at, source, sleep_stage) — so a key-format migration could tombstone the old rows while their re-keyed replacements collided with that index and were silently dropped (live incident: a full-history re-sync erased a user's sleep). Planned creates now run a natural-key rescue probe: a match, live or tombstoned, is updated in place — fresh value, the new externalId, deletedAt cleared. A rescue-probe failure holds the watermark so nothing is lost past the overlap.
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.