Who is this course for?

Beginners who have an idea and want to turn it into a small real app. You do not need to be a developer first. You do need to be willing to write a focused prompt, run a check, and save a working version.

A 120-page designed PDF plus a zip of the Northstar visual reference kit: a browser prototype, screenshot references, and the editable manuscript. You get the archive immediately after purchase.

Will this teach me to code?

It teaches enough Rails, Tailwind, Stimulus, Git, debugging, and deployment to build and judge a small marketplace — by directing an assistant, not by memorizing a language.

Is the visual kit a complete Rails app?

No. It is a browser prototype used as the design target. Rails examples are reference implementations you integrate and test in your own application. Practice checkout records an order; it does not take a card.

How long does it take?

Plan on several weeks of short sessions. Setup can take an evening. The course is organized around completed checkpoints, not a weekend finish line.

Marketplace edition

Build Your First Real App

Learn to prompt. Learn what the code does. Build Northstar — a mini marketplace with a catalog, search, cart, practice checkout, and a receipt job — one checked feature at a time.

Turn a large idea into a small request you can actually judge
Build a storefront in Rails 8, Tailwind, and Stimulus without pretending you shipped Amazon
Protect totals, ownership, and inventory on the server — even when checkout is practice
Debug with evidence, keep a useful Git history, and put the app on Heroku, Fly, or AWS

$44.95 $29.99 limited time

120-page PDF + visual kit · instant download

What’s inside

The course PDF: 120 pages: prompting, software basics, setup, Git, catalog, Stimulus, cart, practice checkout, jobs, debugging, and going live
Northstar visual kit: A browser prototype with compiled Tailwind, real Stimulus controllers, and the screenshot references from the book
What you actually build: Public catalog, search, signed-in cart, server-calculated totals, stock checks, and a durable receipt job
What this is not: Not a finished Rails app, not real card payments, not tax or shipping. Those are later extensions the course names on purpose.

Written for people with an idea, not a computer-science background.

Why this exists

Prompting is the skill. The store is the reason to learn it.

A product grid teaches HTML and loops. A search box teaches requests and queries. A cart teaches state. Checkout teaches trust. A receipt teaches background jobs. Debugging connects all of them.

Every feature starts with a request you can judge. You compare a weak prompt with a better one, ask for a plan, inspect the change, run a check, and save a working version. The code examples help you understand the answer. They are not a substitute for learning to ask the next useful question.

The visual kit is the design target you open in a browser. The Rails lessons are reference implementations you integrate into your own app. That boundary is deliberate: finishing a small product card you can explain is better progress than ten half-working screens.

Who it’s for

A good fit

You have an idea and want a small real app, not another demo
You’re using AI tools and want to direct them instead of hoping
You want enough Rails to judge the result, not a new career first

Probably not for you

You want a complete production marketplace on day one
You need real payments, tax, shipping, or seller accounts
You want a Rails app you can deploy without building it

Build Your First Real App

Prompting is the skill. The store is the reason to learn it.

120 pages, plus the kit you build against

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