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.
npx skills add pjt222/agent-almanac --skill create-r-dockerfilegit 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/skills/pjt222/agent-almanac/create-r-dockerfile)<a href="https://agentmods.dev/skills/pjt222/agent-almanac/create-r-dockerfile"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/create-r-dockerfile/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/skills/pjt222/agent-almanac/create-r-dockerfile"><img src="https://agentmods.dev/badge/skills/pjt222/agent-almanac/create-r-dockerfile.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 | $0.00079 | $0.01678 |
| Opus 5.5 | $0.00032 | $0.00671 |
| Sonnet 5.5 | $0.00016 | $0.00336 |
| Haiku 4.5 | $0.00008 | $0.00168 |
Grade C, and why
create-r-dockerfile scanned grade C with 2 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
&& rm -rf /var/lib/apt/lists/* Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl \ How it starts
The opening of the file, as written. The whole thing — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create R Dockerfile
Build a Dockerfile for R projects using rocker base images with proper dependency management.
When to Use
- Containerizing an R application or analysis
- Creating reproducible R environments
- Deploying R-based services (Shiny, Plumber, MCP server)
- Setting up consistent development environments
Inputs
- Required: R project with dependencies (DESCRIPTION or renv.lock)
- Required: Purpose (development, production, or service)
- Optional: R version (default: latest stable)
- Optional: Additional system libraries needed
Procedure
Step 1: Choose Base Image
| Use Case | Base Image | Size |
|---|---|---|
| Minimal R runtime | rocker/r-ver:4.5.0 |
~800MB |
| With tidyverse | rocker/tidyverse:4.5.0 |
~1.8GB |
| With RStudio Server | rocker/rstudio:4.5.0 |
~1.9GB |
| Shiny server | rocker/shiny-verse:4.5.0 |
~2GB |
Got: A base image is selected that matches the project's requirements without unnecessary bloat.
If fail: If unsure which image to use, start with rocker/r-ver (minimal) and add packages as needed. Check rocker-org for the full image catalog.
Step 2: Write Dockerfile
FROM rocker/r-ver:4.5.0
# Install system dependencies
# Group by purpose for clarity
RUN apt-get update && apt-get install -y \
# HTTP/SSL
libcurl4-openssl-dev \
libssl-dev \
# XML processing
libxml2-dev \
# Git integration
libgit2-dev \
libssh2-1-dev \
# Graphics
libfontconfig1-dev \
libharfbuzz-dev \
libfribidi-dev \
libfreetype6-dev \
libpng-dev \
libtiff5-dev \
libjpeg-dev \
# Utilities
git \
curl \
&& rm -rf /var/lib/apt/lists/*
# Install R packages
# Order: least-changing first for cache efficiency
RUN R -e "install.packages(c( \
'remotes', \
'devtools', \
'renv' \
), repos='https://cloud.r-project.org/')"
# Set working directory
WORKDIR /workspace
# Copy renv files first (cache layer)
COPY renv.lock renv.lock
COPY renv/activate.R renv/activate.R
# Restore packages from lockfile
RUN R -e "renv::restore()"
# Copy project files
COPY . .
# Default command
CMD ["R"]
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 · 206 lines · 79 tokens per session scan C 4ae31fa3caec
create-r-dockerfile is a skill published in the GitHub repository pjt222/agent-almanac (42 stars, last pushed 5d ago), licensed MIT. It adds 79 tokens to every session and 1,678 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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