How Agents Quietly Break Architecture

German dude meandering about how AI agents can quietly break software architecture, why passing tests is not always enough, and how formal models in Lean can help keep the intended meaning of a system close to the implementation. 00:00 Introduction 02:34 Example Project 03:59 High-Level Architecture 05:21 Why "Green Tests" Can Lie 10:26 LEAN Intro 13:10 What The Agent Did 13:55 Rust Implementation 17:47 Spec Driven Development #softwaredevelopment ai #agenticcoding #formalmethods #leanlang #programming #codequality #aiengineering