When an AI builds your app, it will happily tell you it added security. A login screen, some permission checks, maybe a note about encryption. That is the sales pitch. What you actually want to know is whether any of it survives contact with someone who is trying to get in. A lock you have never tested is just a decoration you feel good about.
Let a free scanner poke at a copy first
There are tools that crawl a running website and prod it the way a curious stranger would, looking for the usual soft spots: fields that let bad input through, pages that answer questions they should not, settings left wide open. They cost nothing and produce a plain list of where you are exposed. The one rule is to point them at a staging copy, a duplicate of your app that no real customer touches, so the probing never lands on live data. I keep a staging copy for every client product I host precisely so I can be rough with it.
Tell your AI: "Set up a staging copy of the app and run an automated web vulnerability scan against it. Give me the findings as a ranked list, worst first, with a plain-English fix for each."
Try to reach a customer who is not you
The most damaging leaks I see are not clever. They come from an app that trusts whoever is logged in a little too much. Here is the test you can run yourself. Log in as your own account, then find the part of a web address or request that names your account or your company, usually a number or a code. Change it to a neighbour's. If the app hands you their orders, their messages, or an admin screen you were never meant to see, you have found a serious leak, and you found it before a customer did.
Tell your AI: "Audit the app for broken access control. For every request that reads or changes data, confirm the server checks that the logged-in user actually owns that record, not just that they are logged in. Show me anywhere that check is missing."
Make the check run itself
A one-time audit ages badly. Every new feature your AI ships is a fresh chance to reopen a door you already closed. The fix is to fold these checks into the moment code changes, so the scan and the access-control tests run automatically and shout before anything reaches customers. While you are there, have the same automated step watch for secret keys accidentally pasted into the code, the passwords that connect your app to payments and email. Catching one of those early is the difference between a quiet fix and a bad week.
Tell your AI: "Add these checks to the automatic pipeline that runs on every change: the vulnerability scan, the access-control tests, and a scan for any secret keys committed by mistake. Fail the build and alert me if any of them trip."