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Agent skill · Audited from source

Cran Extrachecks

skill · posit-dev/skillsMIT licenceAudited 31 Oct 2026 · source 5051874ef4e5

★ 552pushed 2 days ago
✓SAFEGrade B · 89/100 · 31 Oct 2026 · 5051874
552repo stars · whole posit-dev/skills
InstallView source on GitHub ↗

Is it safe? Yes — SAFE, grade B (89/100). We read this skill's source at commit 5051874ef4e5 and found no filesystem, network or shell access and no hard-coded secrets. What it does: A collection of Claude Skills from Posit

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Cite this page

ModelsAtlas. “Cran Extrachecks (posit-dev/skills)”. Retrieved 31 Oct 2026. https://modelsatlas.com/skills/posit-dev/cran-extrachecks

Trust audit

Audit 0.4.1 · source read 31 Oct 2026

Trust score89/100✓SAFE B
0 critical0 high1 medium0 low0 info

SAFE means nothing in the source contradicts what the skill says it does. Grade B is shared by 16,667 of 17,602 audited skills.

What the source does

  • FilesystemNone observedNo reads or writes in the source
  • NetworkNone observedNo outbound calls in the source
  • ShellNone observedNo commands run in the source
  • DependenciesPinnedNothing floats
  • SecretsNone foundNo keys in source

Five audit layers

LayerWhat we checkResultFindings
L0 ProvenanceRepo owner, licence, archive status, activityPASS0
L1 Static sourceSecrets, path traversal, supply chain, hidden codeNA0
L2 InstructionsPrompt injection, authority framing, hidden directivesPASS0
L3 InventoryThe files and declarations match the sourceWARN1
L4 SandboxRun in isolation and watch behaviourSKIPPED why0

Gates applied: no behavioural pass.

Findings (1)

MEDIUMInventory / provenanceskill.no_skill_md
F-13 Inventory / provenanceCWE-1104Layer L3
Why
no SKILL.md at the audited path
Fix
a skill without its instruction file cannot be reviewed as one

Audit 0.4.1 · source sha 5051874ef4e5 · 31 Oct 2026Report an issue or request a re-scan

Provenance

Who published it, and what the verdict is pinned to

  • Publisherposit-dev GitHub organizationOwner of the repository this skill is read from
  • Source folderposit-dev/skills/r-lib/cran-extrachecksThe exact folder we audited
  • LicenceMITAs the repository states it
  • Commit pinned for this verdict5051874ef4e5A new audit runs when the source changes
  • Repository statusNot archivedLast push 2 days ago
  • Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

What it tells the agent

Full source on GitHub ↗

We did not capture a SKILL.md for this skill, so there is no instruction text to quote here.

Install

Pinned to the audited commit 5051874

Download folder ↗
git clone https://github.com/posit-dev/skills
git -C skills checkout 5051874ef4e5

The author documents no install command, so this uses the repository directly. Our verdict covers commit 5051874ef4e5 only.

Works in

The author has not said which agents this skill supports, and we have not tested it in any.

Audit history

Every audit, every source change

  1. ✓SAFE B 89 / 100

    first audit · source 5051874ef4e5

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Questions about Cran Extrachecks

What does the Cran Extrachecks skill do?
A collection of Claude Skills from Posit
Is Cran Extrachecks safe to install?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean skill reads B.
What can Cran Extrachecks access on my machine?
The audit observed no filesystem, network or shell use at all in its source.
How current is this page?
The grade is for one exact copy of the source (5051874ef4e5), read on 2026-10-31. The repository is watched, and a new audit runs when it changes — this is the first audit.

Sources

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