Machine Learning Prediction Auditing and Model Card Reporting R package modelcardr version 0.1.0 Audits predictions from fitted machine learning models without requiring retraining or access to the fitted model object. It supports binary classification, multiclass classification, and regression, providing performance metrics with bootstrap confidence intervals, calibration and threshold analyses, residual diagnostics, subgroup comparisons, user-defined acceptance criteria, risk warnings, and self-contained reports. For binary-classification and regression models, the package can also assemble and render structured model cards documenting intended use, evaluation data, performance, subgroup results, assumptions, and limitations. The model-card reporting approach is described by Mitchell et al. (2019) "Model Cards for Model Reporting" <doi:10.1145/3287560.3287596>. Software Depends: R (>= 4.1.0) Imports: graphics, stats, tools, utils, withr Suggests: testthat (>= 3.0.0), jsonlite Georgios P. Georgiou <georgiou.georg@unic.ac.cy> Comprehensive R Archive Network (CRAN) Georgios P. Georgiou [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=modelcardr/LICENSE) 2026-07-30 application/tgz https://CRAN.R-project.org/package=modelcardr doi:10.32614/CRAN.package.modelcardr