You can build and ship an app with AI faster than ever before. This is fantastic.. If you've got an idea, no customers yet, and you need to find out whether anyone even wants it.. move fast. Build it, put it in front of people and learn. But there's a line most non-developers don't see until they're already past it. When customers are re logging in, paying, trusting you with their information, or depending on the app to get a result.. "it worked yesterday" stops being good enough. Here's how it usually goes. You make one small change to improve the checkout.. let's say you add an order bump. Looks great. You ship it. That change quietly breaks the button that gives a new customer access to what they just bought. And you have no clue because there is no error or warning.. From where you're sitting, the app looks fine. Meanwhile your customer thinks you took their money and disappeared. They email support. Maybe they ask for a refund. Maybe they mention it to someone. Maybe they talk crap about you in the comments of your ad. Maybe they just never come back. You find out days later, if you find out at all. This is what automated tests are actually for. Checking that the code looks right is the easy part. The tests that protect a business open a real browser, log in as a real test user, click the actual buttons, and confirm the right things happen.. and that the wrong things can't. The questions a good test suite answers every single time you ship: Can a new customer sign up, pay, and get what they bought? Can the right person reach the right information? Can the wrong person get into something they should never see? Did this new feature break something that was already working? You don't have to click through every page yourself forever. Use an agent that creates end to end tests with Playwright to automate each browser test super fast. The tests get built into the product, and every change gets checked before it ever reaches a customer. Already have an app running with none of this? That's fixable.