targets 0.5.0 Bug fixes Export in-memory config settings from _targets.yaml to parallel workers. New features Add a limited-scope exclude argument to tar_watch() and tar_watch_server() (#458, @gorkang). Write a .gitignore file to ignore everything in _targets/meta/ except .gitignore and _targets/meta/meta. Target Markdown: add knitr engines for pipeline construction and prototyping from within literate programming documents (#469, @cderv, @nviets, @emilyriederer, @ijlyttle, @GShotwell, @gadenbuie, @tomsing1). Huge thanks to @cderv on this one for answering my deluge of questions, helping me figure out what was and was not possible in knitr, and ultimately circling me back to a successful approach. Add an RStudio R Markdown template for Target Markdown (#469). Implement use_targets(), which writes the Target Markdown template to the project root (#469). Implement tar_unscript() to clean up scripts written by Target Markdown. Enhancements Enable priorities in tar_make() and tar_manifest(). Show the priority in the print method of stem and pattern targets. Throw informative errors if the secondary arguments to pattern = slice() or pattern = sample() are invalid. In tar_target_raw(), assert that commands have length 1 when converted to expressions. Handle errors and post failure artifacts in the Github Actions YAML file. Rewrite the documentation on invalidation rules in tar_cue() (@maelle). Drop dplyr groups and "grouped_df" class in tar_group() (tarchetypes discussion #53, @kendonB). Assign branch names to dynamic branching return values produced by tar_read() and tar_read_raw().