r-cli-app SKILL.md skillA
r-cli-app from posit-dev/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add posit-dev/skills/r-cli-app@v1.1Pins v1.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- posit-dev/skills
- Path
r-lib/r-cli-app/SKILL.md- Versions recorded
- 2
- Latest version
- v1.1, committed Apr 20, 2026
- First version recorded
- Mar 6, 2026
- Size
- 11,509 bytes
- Repository stars
- 556
- License
- MIT
Build command-line apps in R using the Rapp package. Use when creating a CLI tool in R, adding argument parsing to an R script, turning an R script into a command-line app, shipping CLIs in an R package, or using Rapp (the alternative Rscript front-end). Also use for shebang scripts, exec/ directory in R packages, or subcommand-based R tools.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Building CLI Apps with Rapp
Rapp (v0.3.0) is an R package that provides a drop-in replacement for `Rscript`
that automatically parses command-line arguments into R values. It turns simple
R scripts into polished CLI apps with argument parsing, help text, and subcommand
support — with zero boilerplate.
**R ≥ 4.1.0** | **CRAN:** `install.packages("Rapp")` | **GitHub:** `r-lib/Rapp`
After installing, put the `Rapp` launcher on PATH:
```r
Rapp::install_pkg_cli_apps("Rapp")
```
This places the `Rapp` executable in `~/.local/bin` (macOS/Linux) or
`%LOCALAPPDATA%\Programs\R\Rapp\bin` (Windows).
---
## Core Concept: Scripts Are the Spec
Rapp scans **top-level expressions** of an R script and converts specific
patterns into CLI constructs. This means:
1. The same script works identically via `source()` and as a CLI tool.
2. You write normal R code — Rapp infers the CLI from what you write.
3. Default values in your R code become the CLI defaults.
Only top-level assignments are recognized. Assignments inside functions,
loops, or conditionals are not parsed as CLI arguments.
---
## Pattern Recognition: R → CLI Mapping
…Read the whole file at its exact version.
How to install
mdr add posit-dev/skills/r-cli-app@sha256:3672e5750ce81d26The line at the top of this page pins the label v1.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_tpfnptf4mliua4qw)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Mar 6, 2026 and Apr 20, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1 latest | 2026-04-20 | 98af5ce | 11,509 B | A | view · diff |
| v1.0 | 2026-03-06 | 0f40d0e | 11,027 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11509 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
posit-dev/skills · 556 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tpfnptf4mliua4qw GET https://markdownregistry.com/api/v1/resolve?ref=posit-dev/skills/r-cli-app GET https://markdownregistry.com/api/v1/blob/3672e5750ce81d2604e73c31afb22aaf45b05ae11993767a46f4d34543dc6aec
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.