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Marc-André Bombeck
36cbf48286
The onboarding baseline step flashed a toast naming one refused field and walked on to the done screen, stamping the account as set up over a value the server never stored. The value the person typed was gone with the step. A refused field now writes its reason into that field's own error slot, marks the control invalid, and holds the step until the person corrects it. Every refused field is named, not only the first, and the reason comes from the validator code rather than the validator's own prose, in all seven shipped languages.
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__/.