agentmods.dev

r-lib

r-lib is a plugin for Claude Code from posit-dev/skills. Its manifest loads nothing; the 8 skills it bundles cost 690 tokens per session together, scanned A, original, MIT.

A set of development skills for people who build R packages, including package testing, command-line tools, release checks, and documentation support.

In plain words
What is it for?
Use it when developing, testing, checking, documenting, or maintaining an R package or R command-line application.
Why use it?
It brings common R package development tasks into one add-on, so developers do not have to handle each workflow from scratch.

Plugin for Claude Code

not rated 490 +2 7d ago A scan tokens not measured original MIT
View the source file posit-dev/skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code
/plugin marketplace add posit-dev/skills
agentmods
npx agentmods add plugins/posit-dev/skills/r-lib
Clone the repo
git clone --depth 1 https://github.com/posit-dev/skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for r-lib

README.md
[![agentmods](https://agentmods.dev/badge/plugins/posit-dev/skills/r-lib.svg)](https://agentmods.dev/plugins/posit-dev/skills/r-lib)
Your own site
<a href="https://agentmods.dev/plugins/posit-dev/skills/r-lib"><img src="https://agentmods.dev/badge/plugins/posit-dev/skills/r-lib.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 8 skills cost 690 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

r-lib scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json#r-lib · 16 lines

What it actually says

{
  "name": "r-lib",
  "description": "Collection of skills for R package developers",
  "source": "./",
  "strict": false,
  "skills": [
    "./r-lib/testing-r-packages",
    "./r-lib/cli",
    "./r-lib/cran-extrachecks",
    "./r-lib/lifecycle",
    "./r-lib/r-package-development",
    "./r-lib/r-cli-app",
    "./r-lib/mirai",
    "./alt-text"
  ]
}
Contents

What it installs

The manifest is a name and a version. 8 skills travel with it, and installing the plugin installs all of them — 690 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Files

What ships with it

1 file beside marketplace.json#r-lib in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 16 lines scan A 086c6a99f72f

Subscribe to this mod's changes

r-lib is a plugin published in the GitHub repository posit-dev/skills (490 stars, last pushed 7d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

LanguagesTestingUnit testingclaude-codeclaude-code-pluginclaude-skills
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