alliance-cvmfs

alliance-cvmfs is a skill for Claude Code from ualberta-rcg/drac-agent-skills. It costs 76 tokens per session (2,138 once invoked), scanned A, original, MIT.

A guide for finding and loading software on Alliance, also called DRAC, high-performance computing clusters. These clusters use Lmod, a command-line module system, and CVMFS, a read-only networked software store.

In plain words
What is it for?
It helps discover available versions, load the required software dependency set, create Python environments, use the cluster's package collection, and run Apptainer containers.
Why use it?
It avoids failed jobs caused by guessing software versions or loading incompatible module dependencies.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It helps discover available versions, load the required software dependency set, create Python environments, use the cluster's package collection, and run Apptainer containers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs
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 ualberta-rcg/drac-agent-skills --skill alliance-cvmfs
Clone the repo
git clone --depth 1 https://github.com/ualberta-rcg/drac-agent-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 alliance-cvmfs

README.md
[![agentmods](https://agentmods.dev/badge/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs/github.svg)](https://agentmods.dev/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs)
Your own site
<a href="https://agentmods.dev/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs"><img src="https://agentmods.dev/badge/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs/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 alliance-cvmfs

Your own site · 80×15
<a href="https://agentmods.dev/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs"><img src="https://agentmods.dev/badge/skills/ualberta-rcg/drac-agent-skills/alliance-cvmfs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,138 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.
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 $0.00076 $0.02138
Opus 5 $0.00038 $0.01069
Sonnet 5 $0.00015 $0.00428
Haiku 4.5 $0.00008 $0.00214

Measured 11d ago against content hash 74f8edba7281, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

alliance-cvmfs 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 11d 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.

etc/claude-code/.claude/skills/alliance-cvmfs/SKILL.md · 264 lines

How it starts

The opening of the file, as written. The whole thing — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Alliance (DRAC) — CVMFS Software Stack

Software on Alliance clusters is served from CVMFS (read-only, network-mounted) and accessed entirely through Lmod (module command). Login and compute nodes see the same stack.

For cluster policies, storage limits, and account questions, check alliance-docs first.

/cvmfs/soft.computecanada.ca         # Alliance software stack
/cvmfs/restricted.computecanada.ca   # licensed software (MATLAB, etc.)
/cvmfs/containers.computecanada.ca   # pre-built Apptainer/Singularity images

Discovery: always use module spider

Never guess versions. Module versions on CVMFS change; guessing one that doesn't exist is the most common failure mode. Always confirm with module spider first.

module spider <name>              # list all available versions
module spider <name>/<version>    # show the exact prerequisite sequence to load it

The spider <name>/<version> output shows one or more valid "You will need to load" lines. Pick one line and load it as a complete set — do not mix lines.

Why module avail is incomplete

Lmod is tiered. module avail only shows what the currently loaded modules have unlocked; it will silently omit CUDA-tier packages (cuDNN, NCCL, etc.) until a compiler and CUDA are already loaded. For discovery, use spider — it searches the full tree regardless of what's loaded.

Core (always visible)
└── Compiler tier (unlocked after: gcc / intel / nvhpc)
    └── CUDA tier (unlocked after: cuda)
        └── MPI tier (unlocked after: openmpi / …)

StdEnv also loads a base stack (gcccore, UCX, OpenMPI, etc.). spider is the right tool when you're not sure what tier a package lives in.

Discovery workflow

# 1. Find real versions for each component
module spider python
module spider gcc
module spider cuda
module spider cudnn

# 2. Get the exact prerequisite sequence for your chosen version
module spider cuda/<version>
module spider cudnn/<version>

# 3. Load the prescribed sequence, then verify
module load StdEnv/2023 gcc/<ver> cuda/<ver> python/<ver>
module list
which python && python --version
nvcc --version

Read the full file on GitHub · 264 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. 11d ago First seen · 264 lines · 76 tokens per session scan A 74f8edba7281

Subscribe to this mod's changes

alliance-cvmfs is a skill published in the GitHub repository ualberta-rcg/drac-agent-skills (2 stars, last pushed 7d ago), licensed MIT. It adds 76 tokens to every session and 2,138 once invoked, about $0.0004 per session on Opus 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 2026-08-31.

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