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Marc-André Bombeck
f72e236b8a
The mood page called the plain `pearsonCorrelation` — strength banded from |r| alone above a floor of five pairs, no significance test — so five days of noise sloping the right way arrived at the reader as a "Strong" badge, with n and r behind an info icon. The guarded twin was written for exactly that failure and names it in its own comment, and the weight, blood-pressure and mood-status surfaces had already moved onto it. The mood page had not. Route the page's five cross-metric channels through `significantPearsonCorrelation` (n >= 20 AND p < 0.05) and carry the reason a pairing was refused, so the card can distinguish "still building" from "twenty days and nothing in them" instead of showing the same blank for both. New copy in all seven locales. Add a structural guard that fails when a new caller of the unguarded helper appears outside a written allowlist. Two callers remain on it, each named as open work rather than as a blessing: the /insights envelope and the AI feature payload both still band at n >= 5, and moving them changes payload shapes their own tests pin.
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.