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Marc-André Bombeck
9c63d3ce20
Platform-wide hardening: the failure classes found live this week hunted down across every integration. Fitbit carried the same tombstone wedge fixed for Google — probe now matches soft-deleted rows and the update resurrects them; the comment describing a partial unique index that never existed is corrected. Sleep segment ids are stable across re-scoring for Withings (session+segment-start), WHOOP/Polar (one segment per stage, no positional index) and Oura (run-start keyed), each with a session-scoped sweep that soft-deletes rows a re-score orphaned — so legacy and affected nights heal as they are re-read. One platform rule for deleted rows: source-owned readings resurrect on re-import (Withings, WHOOP, Oura, Polar, Nightscout, mood webhook, CSV re-imports, Apple stats day-totals); Apple sample-grain deletions stick per the paired-client contract, and the mood bulk route's tombstone match is now a true no-op reported as duplicate. Import counts reconcile against actual createMany counts. Google lifecycle: a dead token registers on the cycle's hard-fail ledger, so an expired connection parks instead of stamping success hourly; backfill and sleep-repair markers stamp only after a clean pass (pg-boss retries are now real); failed measurement writes hold the watermark; no-op updates are skipped; mapping.md tells the current truth. Scale: doctor-report reads only consumed columns and enabled sections; exports and backups keyset-paginate; achievements tally via SQL buckets; series charts day-bucket dense kinds beyond 90 days; BP pairing is a linear two-pointer; distinct-type scans run server-side; the graded-series cold fallback is bounded; the fitbit defer tracker loops instead of spreading.
src/lib/
The server and runtime toolkit. Everything that is not a page, component, or route handler lives here: the API kit, auth, crypto, the rollup tier, AI providers, notifications, background jobs, and the integration clients. Route handlers and RSC pages compose these modules; the modules never reach back into app/.
Core request kit
api-handler.ts— theapiHandlerwrapper every route uses. Auth resolver (cookie OR Bearer),requireAuth/requireAdmin(admin is cookie-only by construction), idempotency plumbing, Wide-Event builder, GlitchTip forwarder.api-response.ts— the{ data, error, meta? }envelope:apiSuccess/apiError,safeJson, trusted-proxy IP resolver,returnAllZodIssues+sanitiseZodIssues.rate-limit.ts— Postgres-backed sliding-window limiter (single atomic upsert); multi-instance correct.idempotency.ts— user-scoped idempotency keys that refuse to cache secret-shaped responses.query-keys/— the only legal source of TanStack QueryqueryKey/mutationKeyarrays (enforced by an ESLint rule); per-feature files behind theindex.tsbarrel.safe-fetch.ts— the one documented outbound-egress entry (redirect: "manual"+ timeout; optional connect-time DNS-rebinding pin). Rawfetch(underlib/+app/is banned by ESLint.db.ts— the Prisma client singleton.crypto.ts— AES-256-GCM at rest with versioned key ids, fail-closed loader, rotation primitives.
Subsystems
auth/— Postgres sessions, secure-cookie flag policy, passkey (WebAuthn) + Argon2id password, per-device refresh-token rotation, HMAC Bearer tokens.ai/— multi-provider insight + Coach engine:provider-chain.ts, hand-rolled{openai,anthropic,local,codex,mock}-client.ts,coach/,prompts/, citation + confidence helpers.rollups/— DAY/WEEK/MONTH/YEAR pre-aggregations for measurements, mood, and medication compliance. Read-swap pattern: probe the rollup, fall back to live SQL on a coverage miss.notifications/— the dispatcher cascade (APNs → Telegram → ntfy → Web Push), per-channelsenders/, retry policy, VAPID config.jobs/— pg-boss workers: reminders, insight pre-generation, backups, retention sweeps, integration backfills. Recurring work belongs here, not inscripts/.integrations/,withings/,whoop/,fitbit/— OAuth clients and sync services for the device providers;sync/holds the shared delta-feed plumbing.analytics/— trend calculations, cadence-aware medicationcompliance.ts, correlations.insights/,fhir/,doctor-report-*.ts— insight pipeline, FHIR R4 export, client-side doctor-report PDF.openapi/— Zod registry that is the source of truth fordocs/api/openapi.yaml.logging/,observability/,monitoring/— Wide-Event transports and the central redaction denylists (redact at the egress boundary, not the call site).validations/— shared Zod schemas, including the SSRFisPublicUrlfloor.i18n/,tz/+timezone.ts,format*.ts— translations, timezone helpers (Berlin for display, UTC in DB), locale formatting.
Conventions
Kebab-case filenames. See ../../CLAUDE.md "Code conventions" and "Security-relevant patterns"; the critical-files map there cites the exact entry points. Most modules carry tests in a sibling __tests__/.