> It's not even clear if AI was used to find the bug

The intro says “We used Claude and Allium”. Allium looks like a tool they’ve built for Claude.

So the article is about how they used their AI tooling and workflow to find the bug.

The article does not explain anything about how they used AI—it just has some relation with the behavioral model a human seems to have written (and an AI does not seem necessary to use!)