Modeling and realization

Python authoring produces immutable declarations that close into the same Rust-owned semantic model as Eqiora Language and Studio.

The public alpha includes native builders for bounded scalar Field, Parameter, and continuous Relation declarations, physical domains and ports, and exact model identity. A typed Realization separately selects an admitted numerical path; choosing FEM or FVM never changes model meaning.

Start with the complete five-minute example, then read the maintained modeling contract for spatial support, revision identity, transaction behavior, supported expressions, and fail-closed examples.

General vector/tensor authoring, state charts, component declarations, CAD builders, and arbitrary realization graphs remain outside this alpha's Python surface.