Field note / philosophy
Theory in the bones
The surface stays small enough for two different engineers to use after a short investigation.
One library, two engineers
A computer scientist and an aerospace engineer should both be able to solve a problem without first absorbing the theory.
General tools
Domain signals sit on top of the core rather than becoming core vocabulary.
The contract
The user investigates; the library returns a working graph, inspectable trace, honest comparison, and next step.