Industry case studies

Six reconstructionsindependent industrial systems, read through MAGE

What these are, and what they are not

These are reconstructions, not case studies in the empirical-SE sense. MAGE ran at none of these companies. Each page reads one independent practitioner report through MAGE’s vocabulary, to test how cleanly a system built by other people, for other reasons, maps onto the theory. The correspondence is always the book’s reading of the source — never a claim the company makes.

These cases are practitioner reports, not replications of MAGE and not causal tests. A correspondence cell states how cleanly the source's described behavior maps onto a MAGE construct as the BOOK reads it — never a claim Cloudflare (or any site) makes about MAGE, and never proof. not-described means the SOURCE is silent; absence from a report is NOT evidence the company lacks the practice.

The six

Cloudflaresoftware / infrastructureTurned its engineering standards into machine-readable policy that agents enforce at review — governance in place before the agents arrived.Read the reconstruction → Spotifysoftware / large-scale platformGoverned its software estate for years, then swapped in a reasoning agent and left the surrounding machinery standing — the environment came first.Read the reconstruction → Shopifysoftware / commerce platformMade every agent session a public, searchable artifact over one shared work surface, so one engineer's experience compounds into everyone's.Read the reconstruction → Dockersoftware / developer infrastructureMoved the trust boundary off the prompt and into a disposable microVM — hard limits that let a role-specialized fleet act more freely.Read the reconstruction → Siemensembedded / CPS / model-based engineeringIts agents arrive into decades of executable engineering models, with source code just one downstream artifact those models generate.Read the reconstruction → Zenseactengineering knowledge work / automotiveCarries the same governance past source code into federated knowledge work — deterministic tools behind structured seams, permissions per role.Read the reconstruction →

Across all six

One page reads the six side by side. The comparative analysis projects the book’s Chapter 6 matrices to the web — the correspondence matrix, the modeling-ceiling ladder, and the convergence tables — from the same model the print edition builds, so the two surfaces cannot fall out of step.