**SQL injection** is one of the oldest and most destructive attacks: someone types database code into a username, password, or search field, and a badly built server runs it, exposing or even deleting your data. If you build apps with AI and have never checked, you may not know whether you are exposed. The good news is that it is also one of the easiest attacks to prevent. This playbook covers the creator's three defenses and adds a quick AI-assisted audit so you can check an existing app.
