# ixsurface 0.1.0

* Initial release.
* `interaction_surface()` for interactive 3D surface plots from fitted models.
* `plot_crossings()` for standalone crossing-point visualization.
* `find_crossings()` for programmatic crossing detection.
* `interaction_surface_grid()` for all-pairwise exploration.
* `sim_factorial()` for generating test data with known interactions.
* Support for `lm`, `glm`, `gam`, and any model with a `predict()` method.
* Automatic binning of continuous conditioning variables.
* Categorical axis support with tick label mapping.
