# Twine Models
Domain-specific models and model-building tools for [Twine](https://github.com/isentropic-dev/twine).
## Orientation
Start with `src/lib.rs` — the doc comments describe the crate layout, the relationship
between `models` and `support`, and how utility code progresses through the crate.
## Design Notes
- `ConstraintError` is an internal building block that may be deprecated.
Prefer local error types with domain-meaningful messages in public APIs.
## Testing
Use `approx::assert_relative_eq!` for floating point comparisons.