Benchmarking Genomic Selection and Machine-Learning Prediction Models // A unified interface to fit, cross-validate and benchmark genomic prediction models from SNP marker data. It implements genomic best linear unbiased prediction (GBLUP) and ridge-regression BLUP in base R, and offers a common interface to machine-learning predictors (elastic net, random forest and gradient boosting) through optional packages, together with a stacked ensemble. Cross-validation uses breeding-relevant schemes and reports prediction accuracy honestly, so models can be compared fairly. The genomic relationship matrix follows VanRaden (2008) doi:10.3168/jds.2007-0980; the mixed-model solver follows Endelman (2011) doi:10.3835/plantgenome2011.08.0024; the genomic-selection framework follows Meuwissen, Hayes and Goddard (2001) doi:10.1093/genetics/157.4.1819.