Covers end-to-end computational reproducibility: making a project's results regenerable with one command, determinism and seed discipline, research compendium structure, replication packages for papers, Binder-launchable repositories, artifact evaluation and reproducibility badges. Use PROACTIVELY when the user wants results others can reproduce, prepares a replication package or artifact submission, mentions reproducibility, research compendia, Binder or badges, asks why results differ between runs or machines, or is about to publish results whose regeneration path is untested. (Pinning environments: rseng-reproducible-environments; pipeline automation: rseng-workflows; …