Shop – Maxyull

The Developer’s AI Prompt Pack

maxyull — Tue, 11 Aug 2026 15:21:03 +0000

55 prompts that do actual engineering work

Not “act as a senior developer”. Prompts with a defined input, a defined
output, and constraints that stop the model from inventing what it does not
know.

What is inside

Debugging — turning a stack trace into a hypothesis, then
into a minimal reproduction.
Code review — asking for the failure case, not for
praise.
Refactoring — with the tests to write first.
Tests — including how to get edge cases that are actually
edge cases.
Documentation and commit messages — that say why, not
what.
Architecture and SQL — schema review, query plans, index
choices.

Format

PDF and Markdown. The Markdown copies straight into Claude, Cursor, ChatGPT
or Copilot Chat without reformatting.

Written for developers who already know their craft and want the model to
stop being vague.

LaunchProof

maxyull — Tue, 11 Aug 2026 15:20:49 +0000

Your vibe-coded app works. Now it has to survive production.

Lovable, Bolt, v0 and Base44 get you to a working prototype fast. Then the
first real user signs up, and the questions change: who can read whose rows,
what happens when Stripe sends the same webhook twice, where do the errors go,
and how do you get your own code out of the platform.

LaunchProof is a production-ready Next.js base, plus the migration
guide to move onto it.

What makes it different from a generic starter

MIGRATION.md — a step by step route from a Lovable-style
app to this repository, written from the questions people actually
ask.
Hardened Row Level Security —
0002_rls_patterns.sql ships owner, team and public policies,
each annotated with the leak it prevents. Most generated apps have RLS
switched on and policies that let any authenticated user read every
row.
MONITORING.md — Sentry wiring, so a production error
reaches you instead of a screenshot from a customer.
PRODUCTION-CHECKLIST.md — what to verify before you point
a domain at it.

Also included

Everything a starter should have: authentication, Stripe billing with a
webhook that stays in sync, a dashboard, a landing page, TypeScript throughout.

Stack

Next.js 15 (App Router) · Supabase · Stripe · Tailwind CSS · TypeScript

Licence

Use it on unlimited personal and client projects. You may not resell or
redistribute the starter itself.

Version 1.0.1. Includes the security fix of 2 August 2026.

SaaS Starter

maxyull — Tue, 11 Aug 2026 15:20:35 +0000

Stop rebuilding the boring parts

Every SaaS starts with the same two weeks of plumbing: authentication, Stripe
subscriptions, a dashboard, a landing page, protected routes, and webhooks that
actually stay in sync. SaaS Starter gives you all of it, so you can build
the part that matters.

What you get

Auth that just works — email and password, Google and
GitHub OAuth, sessions, protected routes, and Row Level Security on
Supabase.
Real Stripe billing — Checkout, Customer Portal, and a
webhook that keeps subscription state in sync. Not a demo: the actual
painful part, solved.
Landing page — hero, features, pricing, call to action.
Responsive, with dark mode.
Dashboard — protected area showing live subscription and
billing status.
Typed, documented code — rename one config file and it is
yours.
Setup guide — from clone to deployed in under an hour.

Stack

Next.js 15 (App Router) · Supabase · Stripe · Tailwind CSS · TypeScript

Getting started

npm install
cp .env.example .env.local
npm run dev

Then follow the included guide for Supabase and Stripe, and deploy to Vercel.

Licence

Use it on unlimited personal and client projects. You may not resell or
redistribute the starter itself.

Version 1.0.1. Includes the security fix of 2 August 2026: pinned
overrides for postcss and sharp, closing three high
severity advisories that shipped with 1.0.0.