A production-grade, monorepo-first starter for

newt-app gives you a Next.js frontend and a real NestJS backend, with auth and a database, curated so you're not deleting half of it on day one.

$npm create newt-app

Next.js

NestJS

Better Auth

database

testing

linter

shadcn/ui

extras

my-app/

apps

webNext.js frontend

app

dashboard

page.tsxtodo example

layout.tsx

page.tsxhome route

next.config.ts

apiNestJS backend

src

todos

todos.service.ts

todos.controller.ts

app.module.ts

main.ts

packages

uishadcn/ui + 40 components

authBetter Auth configuration

dbKysely + Postgres

oxlint-configoxlint + oxfmt

typescript-configShared TypeScript config

$ npm create newt-app my-app -- --shadcn --testing vitest --database postgres --linter oxc

apps/web/app/dashboard/page.tsx

import { Button } from '@my-app/ui/components/button';
import { cn } from '@my-app/ui/lib/utils';
import { auth } from '@my-app/auth';
import { headers } from 'next/headers';

export default async function Dashboard() {
  const session = await auth.api.getSession({
    headers: await headers(),
  });

  return (
    <main className={cn('flex min-h-screen flex-col p-8')}>
      <h1>Welcome back, {session?.user.name}</h1>
      <Button variant="outline">Sign out</Button>
    </main>
  );
}

Share code between apps, not copy it.

@my-app/ui and @my-app/auth are importable by name from day one, in both apps/web and apps/api.

No relative path climbing, no publishing to a registry, no manual workspace links.

A structure that can scale.

Inject NestJS services directly inside Next.js route handlers. Keep your business logic separate from your frontend, organized into modules and providers from day one.

Add services, swap implementations, or move to a standalone API when you're ready.

apps/web/app/api/todos/route.ts

import { NextResponse } from 'next/server';
import { inject } from '@/lib/nest';
import { TodosService } from '@my-app/api';

export async function GET() {
  const todos = await inject(TodosService);
  return NextResponse.json(todos.findAll());
}

export async function POST(req: Request) {
  const { title } = await req.json();
  const todos = await inject(TodosService);
  return NextResponse.json(todos.create(title), { status: 201 });
}