Practical articles on mobile backends, written while Edict is in development.https://edict.dev/enhttps://edict.dev/blog/ai-agent-backend-context-react-native/https://edict.dev/blog/ai-agent-backend-context-react-native/A React Native repo shows an agent only the client. Add a project file, a typed API contract, a local backend and read-only tools for safer backend changes.Mon, 26 Oct 2026 00:00:00 GMTreact-nativeaiagentsarchitecturehttps://edict.dev/blog/backend-context-for-ai-coding-agents/https://edict.dev/blog/backend-context-for-ai-coding-agents/Agents make safer backend changes with declarative config, schemas as contracts, MCP tools, dry runs, reviewed migrations and least-privilege credentials.Mon, 26 Oct 2026 00:00:00 GMTaiagentsarchitecturesecurityhttps://edict.dev/blog/backend-for-an-expo-app/https://edict.dev/blog/backend-for-an-expo-app/What an Expo app needs from a backend: verified sign-in tokens, server-side subscription checks, stored push tokens, and secrets kept out of the bundle.Mon, 26 Oct 2026 00:00:00 GMTexporeact-nativeauthenticationsubscriptionspush-notificationshttps://edict.dev/blog/background-jobs-for-mobile-backends/https://edict.dev/blog/background-jobs-for-mobile-backends/Run mobile reminders and background work using a Postgres queue, SKIP LOCKED, idempotency keys, backoff retries, time zone handling and metrics.Mon, 26 Oct 2026 00:00:00 GMTbackground-jobspostgrespush-notificationsarchitecturehttps://edict.dev/blog/mobile-api-versioning-and-migrations/https://edict.dev/blog/mobile-api-versioning-and-migrations/Old app versions stay installed for years. Use expand and contract migrations, additive API changes, minimum versions and feature flags to change safely.Mon, 26 Oct 2026 00:00:00 GMTmigrationsarchitecturedatabasetestinghttps://edict.dev/blog/per-plan-ai-usage-quotas/https://edict.dev/blog/per-plan-ai-usage-quotas/Give free and paid users different AI limits by routing model calls through your own gateway, metering usage in Postgres, and never embedding a key in the app.Mon, 26 Oct 2026 00:00:00 GMTaiarchitecturepostgressubscriptionshttps://edict.dev/blog/postgres-row-level-security-for-mobile-apps/https://edict.dev/blog/postgres-row-level-security-for-mobile-apps/Row-level security lets Postgres enforce that each user sees only their own rows. Covers policy design, common mistakes, performance, and testing policies.Mon, 26 Oct 2026 00:00:00 GMTpostgressecuritydatabaseauthenticationhttps://edict.dev/blog/push-notifications-architecture/https://edict.dev/blog/push-notifications-architecture/Model users, devices, tokens, and preferences as separate records, handle token invalidation and quiet hours, and send idempotently across APNs and FCM.Mon, 26 Oct 2026 00:00:00 GMTpush-notificationsarchitectureiosandroidhttps://edict.dev/blog/server-side-subscription-entitlements/https://edict.dev/blog/server-side-subscription-entitlements/A mobile app should not decide on the device what a user paid for. Verify purchases on a server and keep entitlements in a table fed by store notifications.Mon, 26 Oct 2026 00:00:00 GMTsubscriptionspaymentsarchitectureioshttps://edict.dev/blog/testing-subscriptions-locally/https://edict.dev/blog/testing-subscriptions-locally/Test trials, renewals, billing retry, expiry and refunds with StoreKit files, sandbox accounts and seeded backend state before any real money moves.Mon, 26 Oct 2026 00:00:00 GMTsubscriptionstestingiosandroid