Connectivity-Weighted Allocation and Comparison of Field-Plot Designs R package cwad version 0.2.0 A reproducible mixed-model toolkit for plant-breeding trial design. It evaluates any replication allocation under a known genetic relationship (kinship) matrix using one common linear-mixed-model engine on genotype means. Crucially, allocation and analysis model are crossed rather than confounded: every allocation can be scored both with and without kinship, so the precision gain attributable to a design can be separated from the gain attributable to the kinship-based analysis adopted alongside it. It computes A-optimal, connectivity-aware allocations via rank-1 Sherman-Morrison updates, and provides Monte-Carlo stress tests for outlier shrinkage and for an incorrectly specified kinship matrix, each with a matched control arm. Software Depends: R (>= 4.0.0) Suggests: testthat (>= 3.0.0), knitr, rmarkdown Praveen Kumar <bkpraveenars@gmail.com> Comprehensive R Archive Network (CRAN) Praveen Kumar [aut, cre] GPL-3 2026-09-26 application/tgz https://CRAN.R-project.org/package=cwad doi:10.32614/CRAN.package.cwad