Changes in version 0.2.0 (2026-07-10) - Added to_grid() as the main interface for pycnophylactic interpolation to multiple grid systems. - Added support for A5, S2, ISEA, local raster and local hex grids. - Added cell_inclusion and cell_allocation options. - Added support for higher-order neighbourhood smoothing. - Added package vignette and expanded examples. - Improved tests and CRAN-readiness. Changes in version 0.1.0 - Initial development release. - Added to_h3() for pycnophylactic interpolation to H3 grids. - Added example NYC census tract datasets. - Added unit tests and vignette infrastructure.