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Marc-André Bombeck
1375d20a9d
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.
src/
Application source. HealthLog is a Next.js 16 App Router project (output: "standalone", React 19, TypeScript strict). The path alias @/* resolves to this directory. Everything a request touches lives under here; the layout below follows the request flow rather than alphabetical order.
Request flow
client → src/proxy.ts → src/app/<route>/route.ts → src/lib/api-handler.ts → handler body → src/lib/api-response.ts → client
proxy.ts— the HTTP edge (Next.js 16's renamedmiddleware). Public-path allowlist, demo-mode mutation block, server-side onboarding redirect, worker-only refusal,x-request-id+ CSP nonce generation, every security header.app/— App Router pages (RSC by default) and API routes. Every API route wraps its handler inapiHandler. Seeapp/README.md.lib/— the server/runtime toolkit:apiHandler, auth, crypto, rollups, AI, notifications, pg-boss jobs, integrations, rate limiting. Seelib/README.md.components/— React components (shadcn/ui new-york, kebab-case files). Seecomponents/README.md.
Other directories
hooks/— shared React hooks (use-prefix, kebab-case).types/— shared TypeScript declarations.generated/prisma/— the generated Prisma client (do not edit; regenerated byprisma generate). Imported as@/generated/prisma.instrumentation.ts— Next.js startup hook; boots the pg-boss worker registry and boot-time backfill queues.__tests__/— cross-cutting unit tests; most tests live in__tests__/folders next to the code they cover.
Conventions
See ../CLAUDE.md for the full set. The load-bearing ones: RSC by default ("use client" only when a hook/state/browser API needs it); every API route wraps apiHandler and parses its body with Zod safeParse; userId is always narrowed from session or Bearer, never accepted as a body field; TanStack Query keys come only from src/lib/query-keys/; outbound HTTP goes through src/lib/safe-fetch.ts.