Essential React 19, Auth.js v5, Billing & Prisma Architecture
Lightweight, fast Next.js 16 App Router core starter with React Server Actions, Auth.js v5 authentication, Prisma ORM schemas, and subscription billing engine.
Every module is structured for maintainability, type safety, and zero bloat.
Type-safe server mutations with zero boilerplate API endpoints.
Integrated subscription checkout and customer billing portal.
Prisma data models for users, accounts, sessions, and subscriptions.
Clean, modular file organization designed to integrate into your existing project in minutes.
app/
├── actions/billing.ts # Server Actions for checkouts
├── api/webhooks/billing # Webhook event dispatcher
├── (dashboard)/ # Protected member dashboard
lib/prisma.ts # Type-safe Prisma client instanceProduction-grade payment processing with cryptographic Svix webhook verification.
Pre-configured signature verification handler for order.created, customer.subscribed, and refund events.
Buyers can manage invoices, upgrade license seats, and access updated repositories anytime.
Instant automated repository invitation via Polar.sh with continuous git pull version updates.
Every starter kit and UI primitive adheres to strict engineering benchmarks.
End-to-End Strict TypeScript & Dart
Verified Webhook Security
Clean, Modular Architecture
Continuous Maintenance
Everything you need to know about licensing, setup, and support.
DevPreFlight provides production-grade starter kits and boilerplates categorized into 3 distinct tiers: Tier 1 (Micro Modules, $19-$29) for single-purpose utilities like webhook handlers or UI kits; Tier 2 (Core Feature Kits, $49-$69) for core auth, payment, and database setups; and Tier 3 (The All-in-One Mega Starter Kit, $99-$149) for complete full-stack SaaS boilerplates with lifetime updates and instant GitHub repository access.