Human and Machine-Readable Justifications and Justified Decisions Based on 'YAML' R package justifier version 0.2.8 Leverages the 'yum' package to implement a 'YAML' ('YAML Ain't Markup Language', a human friendly standard for data serialization; see <https://yaml.org>) standard for documenting justifications, such as for decisions taken during the planning, execution and analysis of a study or during the development of a behavior change intervention as illustrated by Marques & Peters (2019) <doi:10.17605/osf.io/ndxha>. These justifications are both human- and machine-readable, facilitating efficient extraction and organisation. Software Depends: R (>= 4.1) Imports: data.tree (>= 0.7.8), DiagrammeR (>= 1.0.0), DiagrammeRsvg (>= 0.1), purrr (>= 0.3.0), yaml (>= 2.2.0), yum (>= 0.0.1) Suggests: covr, here, jsonlite (>= 1.7), knitr, rmarkdown, testthat Gjalt-Jorn Peters <justifier@opens.science> Comprehensive R Archive Network (CRAN) Gjalt-Jorn Peters [aut, cre] (ORCID: <https://orcid.org/0000-0002-0336-9589>), Szilvia Zorgo [ctb] (ORCID: <https://orcid.org/0000-0002-6916-2097>) GPL (>= 2) 2025-11-14 application/tgz https://CRAN.R-project.org/package=justifier doi:10.32614/CRAN.package.justifier