A few months ago, I ran into a problem I couldn't ignore.

I was building software with payments, wallets, settlements and complex workflows. Everything looked fine. The tests passed. The API worked.

But I kept asking myself one question.

What if someone abuses the business logic?

I searched for tools that could answer that. Most of them focused on dependencies, code quality and common security issues. Those are important, but they weren't answering the questions I cared about.