Cli

If you write R packages or scripts with any console output, this will clean up your messaging immediately. It handles the complete spectrum of command-line formatting: errors with `cli_abort()`, warnings, info messages, progress bars, and all the inline markup you need for styling code, files, variables, and values. The pluralization helpers alone (`{?s}`, `qty()`, `no()`) will save you from embarrassing "1 files found" messages. What makes this genuinely useful is how it replaces clunky base R `stop()` and `message()` calls with formatted, structured output that actually looks professional. The progress indicators auto-cleanup on function exit, and everything supports semantic elements like bullets, headers, and alerts without manual ANSI code wrangling.

Install to Claude Code

npx -y skills add posit-dev/skills --skill cli --agent claude-code