MemoryDensity

Years feel shorter as you age. MemoryDensity is a daily practice designed to make weeks more retrievable — and designed so that missing a day never feels like failure.

Highlights

• Daily reflection prompts — A Vercel cron (/api/cron/assign-prompts) runs hourly and assigns each user today’s prompt from a Postgres catalog based on their stored timezone; responses are submitted, edited, skipped, or deleted via Next.js server actions with RLS-protected user_responses rows.
• First-times log — Users record novel experiences in a dedicated dashboard section; CRUD flows through server actions against a first_times table, with cursor-based infinite scroll (useInfiniteScroll + paginated server actions) for long histories.
• Weekly Time Capsules — A Monday cron (/api/cron/generate-capsules) aggregates the prior week’s prompt answers and first-times into JSON snapshots stored in time_capsules, then notifies users via in-app feed, web push, and/or a React Email digest sent through Resend.
• Email OTP authentication — Passwordless sign-in/sign-up using Supabase Auth 6-digit codes (not magic-link redirects); proxy.ts refreshes sessions on every request, guards /dashboard/*, and redirects incomplete onboarding to /onboarding.
• Timezone-aware notifications — Onboarding captures timezone, preferred prompt reminder hour, and channel (push or email); /api/cron/send-push delivers reminders through web-push + VAPID keys or falls back to Resend, with idempotency tracked in cron_deliveries.
• Installable PWA with offline fallback — Serwist generates a service worker (app/sw.ts) with precaching, network-only rules for authenticated routes, and an /offline fallback; manifest.json enables home-screen install, with a dedicated /install guide for iOS and Android.
• Production observability & CI — Sentry captures client and server errors; GitHub Actions runs ESLint, Vitest, and production builds on every PR.