Run Python, Julia, and Rust Inside 'targets' Pipeline Steps R package tarpolyglot version 0.2.1 Adds target constructors that make it easy to use Python, Julia, and Rust inside a 'targets' pipeline using 'reticulate', 'JuliaCall', and 'rextendr'. Provides tar_target_py(), tar_target_jl(), and tar_target_rs() (with matching _raw() variants), each mirroring 'targets::tar_target()' and 'targets::tar_target_raw()'. Python and Julia steps run a script via a live interpreter with optional R pre- and post-scripts; Rust steps compile '#[extendr]' functions and call them from an R post-script. Results are returned either as converted R objects or as files written to disk (format = "file"). Dynamic branching, environment/version selection, a 'crew' controller for isolation, and the full set of tar_target_raw() arguments are supported. Software Imports: targets, reticulate, JuliaCall, crew, rextendr Suggests: knitr, rmarkdown, tarchetypes, testthat (>= 3.0.0), withr Pierre Solomon <pierre.solomon@laposte.net> Comprehensive R Archive Network (CRAN) Pierre Solomon [aut, cre] (ORCID: <https://orcid.org/0000-0001-7187-2664>) MIT + file LICENSE (https://CRAN.R-project.org/package=tarpolyglot/LICENSE) 2026-09-03 application/tgz https://CRAN.R-project.org/package=tarpolyglot doi:10.32614/CRAN.package.tarpolyglot