Automated Soil Profile Classification per WRB 2022, 'SiBCS' 5 and USDA Soil Taxonomy 13 R package soilKey version 0.9.184 Implements deterministic classification keys for the World Reference Base for Soil Resources 2022 (4th edition) and the Brazilian System of Soil Classification ('SiBCS', 5th edition). Provides a unified profile representation with explicit per-attribute provenance, multimodal extraction from field reports and photos via vision-language models, spatial priors from 'SoilGrids' and national soil maps, and gap-filling of soil attributes from Vis-NIR or MIR spectra via the Open Soil Spectral Library ('OSSL'). The taxonomic key itself is never delegated to a language model; LLMs are restricted to schema-validated extraction. Each classification result reports a key trace, a provenance-aware evidence grade, and ambiguities that further measurement would resolve. Software Depends: R (>= 4.1) Imports: R6, data.table, yaml, cli, rlang Suggests: aqp, SoilTaxonomy, mpspline2, terra, foreign, sf, chromote, munsellinterpol, pls, prospectr, resemble, ellmer, httr, jsonlite, jsonvalidate, pdftools, magick, shiny (>= 1.7.0), DT, bslib, shinyWidgets, plotly, leaflet, htmltools, withr, DBI, RSQLite, base64enc, maps, testthat (>= 3.0.0), knitr, rmarkdown Hugo Rodrigues <rodrigues.machado.hugo@gmail.com> Comprehensive R Archive Network (CRAN) Hugo Rodrigues [aut, cre] (ORCID: <https://orcid.org/0000-0002-8070-8126>) MIT + file LICENSE (https://CRAN.R-project.org/package=soilKey/LICENSE) 2026-07-07 application/tgz https://CRAN.R-project.org/package=soilKey doi:10.32614/CRAN.package.soilKey