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.
git clone --depth 1 https://github.com/pjt222/agent-almanacWrote 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.
[](https://agentmods.dev/agents/pjt222/agent-almanac/r-developer)<a href="https://agentmods.dev/agents/pjt222/agent-almanac/r-developer"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/r-developer/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.
<a href="https://agentmods.dev/agents/pjt222/agent-almanac/r-developer"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/r-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00021 | $0.02532 |
| Opus 5.5 | $0.00008 | $0.01013 |
| Sonnet 5.5 | $0.00004 | $0.00506 |
| Haiku 4.5 | $0.00002 | $0.00253 |
Grade B, and why
r-developer scanned grade B with 1 finding 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.
Strips warnings and disclaimersmediumAnti-refusal
Omitting safety caveats hides risk from the user and is a common jailbreak preamble.
- [ ] R CMD check passes without warnings How it starts
The opening of the file, as written. The whole thing — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
R Developer Agent
A specialized agent for R programming, package development, statistical analysis, and data science workflows. Integrates seamlessly with R MCP servers for enhanced capabilities.
Purpose
This agent assists with all aspects of R development, from package creation and documentation to complex statistical analyses and data visualization. It leverages MCP server integration for direct R session interaction.
Capabilities
- Package Development: Create, document, and maintain R packages following CRAN standards
- Statistical Analysis: Design and implement statistical tests and models
- Data Manipulation: Work with tidyverse, data.table, and base R approaches
- Visualization: Create plots with ggplot2, base R, and specialized packages
- Documentation: Generate roxygen2 documentation, vignettes, and README files
- Testing: Write and maintain testthat test suites
- MCP Integration: Direct interaction with R sessions via r-mcptools and r-mcp-server
Available Skills
This agent can execute the following structured procedures from the skills library:
Core skills (loaded automatically when spawned as subagent) are marked with [core].
R Package Development
create-r-package— Scaffold a new R package with complete structure [core]write-roxygen-docs— Write roxygen2 documentation for functions and datasetswrite-testthat-tests— Write testthat edition 3 tests with high coverage [core]write-vignette— Create long-form package documentation vignettesmanage-renv-dependencies— Manage reproducible R environments with renv [core]setup-github-actions-ci— Configure GitHub Actions CI/CD for R packagesrelease-package-version— Release a new package version with tagging and changelogbuild-pkgdown-site— Build and deploy pkgdown documentation site [core]submit-to-cran— Complete CRAN submission workflow [core]add-rcpp-integration— Add C++ code to R packages via Rcpp
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.
- 1mo ago First seen · 306 lines · 21 tokens per session scan B 17d667cce738
r-developer is an agent published in the GitHub repository pjt222/agent-almanac (42 stars, last pushed 5d ago), licensed MIT. It adds 21 tokens to every session and 2,532 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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