Declarative EQUATOR-Style Flow Diagrams for Clinical Studies R package selecta version 0.6.0 Build EQUATOR-style flowcharts for clinical studies by sequentially defining inclusion and exclusion criteria, study arms, and endpoints. The pipe-friendly API supports CONSORT (randomized trials), STROBE (observational cohorts), STARD (diagnostic accuracy), PRISMA (systematic reviews), and MOOSE (observational meta-analysis) diagram layouts, as well as multi-source convergence, split-and-recombine, factorial, and hybrid topologies. Diagrams are rendered via 'grid' graphics in both data-driven (automatic counting) and manual-count modes, with optional 'DiagrammeR'/'Graphviz' output. Software Depends: R (>= 4.1.0) Imports: data.table, grid Suggests: DiagrammeR, knitr, ragg, rmarkdown, testthat (>= 3.0.0) Paul Hsin-ti McClelland <PaulHMcClelland@protonmail.com> Comprehensive R Archive Network (CRAN) Paul Hsin-ti McClelland [aut, cre, cph] (ORCID: <https://orcid.org/0000-0002-3119-6531>) GPL (>= 3) 2026-06-24 application/tgz https://CRAN.R-project.org/package=selecta doi:10.32614/CRAN.package.selecta