An Accessible Interface for Stock-and-Flow Modelling R package sdbuildR version 2.2.2 Stock-and-flow models are a computational method from the field of system dynamics. They represent how systems change over time and are mathematically equivalent to ordinary differential equations. 'sdbuildR' (system dynamics builder) provides an intuitive interface for constructing stock-and-flow models without requiring extensive domain knowledge. Models can quickly be simulated and revised, supporting iterative development. 'sdbuildR' simulates models in 'R' and 'Julia', and supports computationally intensive ensemble simulations. Additionally, 'sdbuildR' can import models created in 'Insight Maker' (<https://insightmaker.com/>). Software Depends: R (>= 4.2.0) Imports: cli, data.table, deSolve, DiagrammeR, future, future.apply, htmltools, htmlwidgets, igraph, jsonlite, JuliaConnectoR, plotly, progressr, rlang, stringi, stringr, textutils, tools, utils, withr, xml2 Suggests: callr, gt, DiagrammeRsvg, kableExtra, knitr, qgraph, rsvg, testthat (>= 3.0.0), this.path, webshot2, bslib Kyra Caitlin Evers <kyra.c.evers@gmail.com> Comprehensive R Archive Network (CRAN) Kyra Caitlin Evers [aut, cre, cph] (ORCID: <https://orcid.org/0000-0001-6890-3482>), STIX Fonts Project Authors [ctb, cph] (Bundled STIX Two Text font (inst/fonts/), SIL Open Font License 1.1) GPL (>= 3) 2026-07-17 application/tgz https://CRAN.R-project.org/package=sdbuildR doi:10.32614/CRAN.package.sdbuildR