The Ultimate Supabase + Next.js Prompt Template

Why Supabase + Next.js is the Default Stack

When developers ask AI to build a full-stack web app in 2026, Supabase and Next.js come up more than any other combination. Supabase gives you a Postgres database, auth, realtime subscriptions, and file storage — all with a generous free tier. Next.js handles routing, server components, and API layers. Together, they cover everything a typical SaaS or community app needs.

The catch: AI-generated Supabase + Next.js code quality varies wildly depending on how much detail you provide. This guide gives you a battle-tested prompt template.

The Core Template

Here's the baseline prompt structure. Fill in the bracketed sections for your project:

``` Build a [PROJECT TYPE] called [NAME] using Next.js 16 (App Router) and Supabase.

TECH STACK: - Next.js 16 with App Router and TypeScript strict mode - Tailwind CSS v4 for styling - Supabase for database (PostgreSQL), authentication, and file storage - Supabase Auth with [email/password | GitHub OAuth | magic link] - Zod for schema validation - React Hook Form for form handling - Deployed to Vercel

DATABASE SCHEMA: [List your main tables and relationships here]

AUTH REQUIREMENTS: - Protected routes: [list them] - Public routes: [list them] - Auth redirect: /dashboard after sign-in

PAGES TO BUILD: [List all pages]

KEY FEATURES: [List features] ```

Supabase-Specific Details That Matter

1. Specify the client setup Tell the AI to use `@supabase/ssr` (not the legacy `@supabase/auth-helpers-nextjs`). The helper package is deprecated and AI models often default to it.

2. Row Level Security Explicitly ask for RLS policies. Without this, your database will be open to any authenticated user. Add: "Enable Row Level Security on all tables. Users can only read and write their own data."

3. Server vs Client components Specify where data fetching happens: "Fetch user data in Server Components using the Supabase server client. Use the browser client only for realtime subscriptions."

4. TypeScript types Ask for generated types: "Generate TypeScript types from the Supabase schema using `supabase gen types typescript`. Import from `@/types/supabase`."

A Complete Worked Example

For a task management app:

``` Build a task management app called TaskFlow using Next.js 16 and Supabase.

Auth: Email/password with Supabase Auth. Protect all /app/* routes.

Tables: - profiles (id, email, name, avatar_url) — extends auth.users - projects (id, owner_id, name, color, created_at) - tasks (id, project_id, title, description, status, due_date, assignee_id)

RLS: Users see only projects they own. Tasks inherit project RLS.

Pages: /login, /signup, /app/dashboard, /app/projects/[id], /app/settings

Features: Create/edit/delete projects and tasks. Drag-to-reorder tasks (using @dnd-kit). Mark tasks complete. Filter by status. ```

This level of detail produces usable scaffolding in one pass. Use WebPromptify to generate this template automatically for your specific project type.