I always find reading small configuration files way more difficult than reading a big codebase.
I accept config files do really help in writing a better flexible code and separating the logic and settings but always offer a stiff learning curve.
And often, people make changes in config either unintentionally or with half knowledge which works in local but later blows up the entire system.
Wondering how config files can be presented in a way that the learning curve is minimal and the understandability of its impact is more visible.
I do really like annotations or decorators which provides a closer visibility between config and code.