Bounded Outcome Risk Guard for Model Evaluation R package BORG version 0.3.1 Comprehensive toolkit for valid spatial, temporal, and grouped model evaluation. Automatically detects data dependencies (spatial autocorrelation, temporal structure, clustered observations), generates appropriate cross-validation schemes (spatial blocking, checkerboard, hexagonal, KNNDM, environmental blocking, leave-location-out, purged CV), and validates evaluation pipelines for leakage. Includes area of applicability (AOA) assessment following Meyer & Pebesma (2021) <doi:10.1111/2041-210X.13650>, forward feature selection with blocked CV, spatial thinning, block-permutation variable importance, extrapolation detection, and interactive visualizations. Integrates with 'tidymodels', 'caret', 'mlr3', 'ENMeval', and 'biomod2'. Based on evaluation principles described in Roberts et al. (2017) <doi:10.1111/ecog.02881>, Kaufman et al. (2012) <doi:10.1145/2382577.2382579>, Kapoor & Narayanan (2023) <doi:10.1016/j.patter.2023.100804>, and Linnenbrink et al. (2024) <doi:10.5194/gmd-17-5897-2024>. Software Depends: R (>= 4.1.0) Imports: Rcpp, methods, stats, utils LinkingTo: Rcpp Suggests: caret, ggplot2 (>= 3.4.0), leaflet, rsample, tidyselect, recipes, mlr3, sf, terra, tidyterra, ranger, parsnip, workflows, xgboost, lightgbm, future.apply, testthat (>= 3.0.0), knitr, rmarkdown Gilles Colling <gilles.colling051@gmail.com> Comprehensive R Archive Network (CRAN) Gilles Colling [aut, cre, cph] (ORCID: <https://orcid.org/0000-0003-3070-6066>) MIT + file LICENSE (https://CRAN.R-project.org/package=BORG/LICENSE) 2026-03-29 application/tgz https://CRAN.R-project.org/package=BORG doi:10.32614/CRAN.package.BORG en-US