Platform engineering is the discipline of designing and building toolchains and workflows that enable self-service capabilities for software engineering organizations in the cloud-native era.

Platform Engineering

My initial reaction is: why not analyze the end result (the infra itself). Or are you less interested in the outcome and more their path to get there? 

Yes, more interested in the code standardisation rather than the final infrastructure

I’m not aware of free/open source solutions, but Sourcegraph has capabilities like this

<https://sourcegraph.com/blog/announcing-code-insights|https://sourcegraph.com/blog/announcing-code-insights>