Mock modepayments, email are simulated. No real payments, emails or production data.
What "finished" means, and the checks between a working localhost and something you can send to a person.
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AI Essentials
The pre-flight before a deploy, and the order to work in when something breaks in production.
Schema decisions, RLS patterns and the two keys — with the mistakes that are expensive to undo.
The commands you actually type, what each one is for, and how to get back when something goes wrong.