feat: add saas-mvp-launcher skill
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SnakeEye-sudo (Er. Sangam Krishna)
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skills/saas-mvp-launcher/SKILL.md
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skills/saas-mvp-launcher/SKILL.md
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---
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name: saas-mvp-launcher
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description: "Use when planning or building a SaaS MVP from scratch. Provides a structured roadmap covering tech stack, architecture, auth, payments, and launch checklist."
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risk: low
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source: community
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date_added: "2026-03-04"
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---
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# SaaS MVP Launcher
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## Overview
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This skill guides you through building a production-ready SaaS MVP in the shortest time possible. It covers everything from idea validation and tech stack selection to authentication, payments, database design, deployment, and launch — using modern, battle-tested tools.
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## When to Use This Skill
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- Use when starting a new SaaS product from scratch
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- Use when you need to choose a tech stack for a web application
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- Use when setting up authentication, billing, or database for a SaaS
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- Use when you want a structured launch checklist before going live
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- Use when designing the architecture of a multi-tenant application
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- Use when doing a technical review of an existing early-stage SaaS
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## Step-by-Step Guide
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### 1. Validate Before You Build
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Before writing any code, validate the idea:
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```
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Validation checklist:
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- [ ] Can you describe the problem in one sentence?
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- [ ] Who is the exact customer? (not "everyone")
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- [ ] What do they pay for today to solve this?
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- [ ] Have you talked to 5+ potential customers?
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- [ ] Will they pay $X/month for your solution?
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```
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**Rule:** If you can't get 3 people to pre-pay or sign a letter of intent, don't build yet.
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### 2. Choose Your Tech Stack
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Recommended modern SaaS stack (2026):
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| Layer | Choice | Why |
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|-------|--------|-----|
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| Frontend | Next.js 15 + TypeScript | Full-stack, great DX, Vercel deploy |
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| Styling | Tailwind CSS + shadcn/ui | Fast, accessible, customizable |
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| Backend | Next.js API Routes or tRPC | Type-safe, co-located |
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| Database | PostgreSQL via Supabase | Reliable, scalable, free tier |
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| ORM | Prisma or Drizzle | Type-safe queries, migrations |
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| Auth | Clerk or NextAuth.js | Social login, session management |
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| Payments | Stripe | Industry standard, great docs |
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| Email | Resend + React Email | Modern, developer-friendly |
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| Deployment | Vercel (frontend) + Railway (backend) | Zero-config, fast CI/CD |
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| Monitoring | Sentry + PostHog | Error tracking + analytics |
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### 3. Project Structure
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```
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my-saas/
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├── app/ # Next.js App Router
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│ ├── (auth)/ # Auth routes (login, signup)
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│ ├── (dashboard)/ # Protected app routes
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│ ├── (marketing)/ # Public landing pages
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│ └── api/ # API routes
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├── components/
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│ ├── ui/ # shadcn/ui components
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│ └── [feature]/ # Feature-specific components
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├── lib/
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│ ├── db.ts # Database client (Prisma/Drizzle)
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│ ├── stripe.ts # Stripe client
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│ └── email.ts # Email client (Resend)
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├── prisma/
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│ └── schema.prisma # Database schema
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├── .env.local # Environment variables
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└── middleware.ts # Auth middleware
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```
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### 4. Core Database Schema (Multi-tenant SaaS)
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```prisma
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model User {
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id String @id @default(cuid())
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email String @unique
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name String?
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createdAt DateTime @default(now())
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subscription Subscription?
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workspaces WorkspaceMember[]
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}
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model Workspace {
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id String @id @default(cuid())
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name String
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slug String @unique
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plan Plan @default(FREE)
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members WorkspaceMember[]
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createdAt DateTime @default(now())
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}
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model Subscription {
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id String @id @default(cuid())
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userId String @unique
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user User @relation(fields: [userId], references: [id])
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stripeCustomerId String @unique
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stripePriceId String
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stripeSubId String @unique
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status String # active, canceled, past_due
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currentPeriodEnd DateTime
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}
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enum Plan {
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FREE
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PRO
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ENTERPRISE
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}
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```
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### 5. Authentication Setup (Clerk)
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```typescript
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// middleware.ts
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import { clerkMiddleware, createRouteMatcher } from '@clerk/nextjs/server';
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const isPublicRoute = createRouteMatcher([
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'/',
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'/pricing',
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'/blog(.*)',
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'/sign-in(.*)',
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'/sign-up(.*)',
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'/api/webhooks(.*)',
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]);
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export default clerkMiddleware((auth, req) => {
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if (!isPublicRoute(req)) {
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auth().protect();
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}
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});
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export const config = {
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matcher: ['/((?!.*\\..*|_next).*)', '/', '/(api|trpc)(.*)'],
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};
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```
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### 6. Stripe Integration (Subscriptions)
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```typescript
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// lib/stripe.ts
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import Stripe from 'stripe';
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export const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!, {
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apiVersion: '2025-01-27.acacia',
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});
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// Create checkout session
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export async function createCheckoutSession(userId: string, priceId: string) {
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return stripe.checkout.sessions.create({
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mode: 'subscription',
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payment_method_types: ['card'],
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line_items: [{ price: priceId, quantity: 1 }],
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success_url: `${process.env.NEXT_PUBLIC_URL}/dashboard?success=true`,
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cancel_url: `${process.env.NEXT_PUBLIC_URL}/pricing`,
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metadata: { userId },
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});
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}
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```
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### 7. Pre-Launch Checklist
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**Technical:**
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- [ ] Authentication works (signup, login, logout, password reset)
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- [ ] Payments work end-to-end (subscribe, cancel, upgrade)
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- [ ] Error monitoring configured (Sentry)
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- [ ] Environment variables documented
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- [ ] Database backups configured
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- [ ] Rate limiting on API routes
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- [ ] Input validation with Zod on all forms
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- [ ] HTTPS enforced, security headers set
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**Product:**
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- [ ] Landing page with clear value proposition
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- [ ] Pricing page with 2-3 tiers
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- [ ] Onboarding flow (first value in < 5 minutes)
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- [ ] Email sequences (welcome, trial ending, payment failed)
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- [ ] Terms of Service and Privacy Policy pages
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- [ ] Support channel (email / chat)
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**Marketing:**
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- [ ] Domain purchased and configured
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- [ ] SEO meta tags on all pages
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- [ ] Google Analytics or PostHog installed
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- [ ] Social media accounts created
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- [ ] Product Hunt draft ready
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## Best Practices
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- ✅ **Do:** Ship a working MVP in 4-6 weeks maximum, then iterate based on feedback
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- ✅ **Do:** Charge from day 1 — free users don't validate product-market fit
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- ✅ **Do:** Build the "happy path" first, handle edge cases later
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- ✅ **Do:** Use feature flags for gradual rollouts (e.g., Vercel Edge Config)
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- ✅ **Do:** Monitor user behavior from launch day — not after problems arise
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- ❌ **Don't:** Build every feature before talking to customers
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- ❌ **Don't:** Optimize for scale before reaching $10k MRR
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- ❌ **Don't:** Build a custom auth system — use Clerk, Auth.js, or Supabase Auth
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- ❌ **Don't:** Skip the onboarding flow — it's where most SaaS lose users
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## Troubleshooting
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**Problem:** Users sign up but don't activate (don't use core feature)
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**Solution:** Reduce steps to first value. Track with PostHog where users drop off in onboarding.
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**Problem:** High churn after trial
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**Solution:** Add an exit survey. Most churn is due to lack of perceived value, not price.
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**Problem:** Stripe webhook events not received locally
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**Solution:** Use Stripe CLI: `stripe listen --forward-to localhost:3000/api/webhooks/stripe`
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**Problem:** Database migrations failing in production
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**Solution:** Always run `prisma migrate deploy` (not `prisma migrate dev`) in production environments.
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