create-r-package

create-r-package is a skill for Claude Code from pjt222/agent-almanac. It costs 94 tokens per session (1,717 once invoked), scanned A, original, MIT.

A starter structure for a new R package, including its metadata, source folders, documentation, tests, dependency environment, and development files. R is a programming language commonly used for statistics and data analysis.

In plain words
What is it for?
Starting an R package, turning loose R scripts into a reusable library, and setting up a package for collaboration and automated checks.
Why use it?
It avoids assembling the package layout and development setup by hand. The structure gives the project standard places for code, documentation, tests, and dependencies.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md.

Part of the agent-almanac plugin — 122 skills, 77 agents shipped together

Good fit Starting an R package, turning loose R scripts into a reusable library, and setting up a package for collaboration and automated checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/pjt222/agent-almanac/create-r-package
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.

Any agent
npx skills add pjt222/agent-almanac --skill create-r-package
Clone the repo
git clone --depth 1 https://github.com/pjt222/agent-almanac

Made for: Claude Code.

Or install agent-almanac, the plugin that ships this one along with the rest of its 122 skills, 77 agents.

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 create-r-package

README.md
[![agentmods](https://agentmods.dev/badge/skills/pjt222/agent-almanac/create-r-package/github.svg)](https://agentmods.dev/skills/pjt222/agent-almanac/create-r-package)
Your own site
<a href="https://agentmods.dev/skills/pjt222/agent-almanac/create-r-package"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/create-r-package/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for create-r-package

Your own site · 80×15
<a href="https://agentmods.dev/skills/pjt222/agent-almanac/create-r-package"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/create-r-package.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,717 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00094 $0.01717
Opus 5.5 $0.00038 $0.00687
Sonnet 5.5 $0.00019 $0.00343
Haiku 4.5 $0.00009 $0.00172

Measured 1mo ago against content hash 9f980d4e2614, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

create-r-package 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 1mo ago.

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.

i18n/caveman-lite/skills/create-r-package/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create R Package

Scaffold a fully configured R package with modern tooling and best practices.

When to Use

  • Starting a new R package from scratch
  • Converting loose R scripts into a package
  • Setting up a package skeleton for collaborative development

Inputs

  • Required: Package name (lowercase, no special characters except .)
  • Required: One-line description of the package purpose
  • Optional: License type (default: MIT)
  • Optional: Author information (name, email, ORCID)
  • Optional: Whether to initialize renv (default: yes)

Procedure

Step 1: Create Package Skeleton

usethis::create_package("packagename")
setwd("packagename")

Got: Directory created with DESCRIPTION, NAMESPACE, R/, and man/ subdirectories.

If fail: Ensure usethis is installed (install.packages("usethis")). Check that the directory does not already exist.

Step 2: Configure DESCRIPTION

Edit DESCRIPTION with accurate metadata:

Package: packagename
Title: What the Package Does (Title Case)
Version: 0.1.0
Authors@R:
    person("First", "Last", , "[email protected]", role = c("aut", "cre"),
           comment = c(ORCID = "0000-0000-0000-0000"))
Description: One paragraph describing what the package does. Must be more
    than one sentence. Avoid starting with "This package".
License: MIT + file LICENSE
Encoding: UTF-8
Roxygen: list(markdown = TRUE)
RoxygenNote: 7.3.2
URL: https://github.com/username/packagename
BugReports: https://github.com/username/packagename/issues

Got: Valid DESCRIPTION that passes R CMD check with no metadata warnings.

If fail: If R CMD check warns about DESCRIPTION fields, verify that Title is in Title Case, Description is more than one sentence, and Authors@R uses valid person() syntax.

Step 3: Set Up Infrastructure

usethis::use_mit_license()
usethis::use_readme_md()
usethis::use_news_md()
usethis::use_testthat(edition = 3)
usethis::use_git()
usethis::use_github_action("check-standard")

Read the full file on GitHub · 210 lines

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. 1mo ago First seen · 210 lines · 94 tokens per session scan A 9f980d4e2614

Subscribe to this mod's changes

create-r-package is a skill published in the GitHub repository pjt222/agent-almanac (42 stars, last pushed 5d ago), licensed MIT. It adds 94 tokens to every session and 1,717 once invoked, about $0.0004 per session on Opus 5.5. 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.

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