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torchcell: Skill for Claude Code

.claude/skills/ruff/SKILL.md

ruff is a skill for Claude Code from Mjvolk3/torchcell. It costs 22 tokens per session (1,145 once invoked), scanned A, original, no licence file.

A Python code checker that runs Ruff, a tool for finding style and code-quality problems, on staged or selected files.

In plain words
What is it for?
Use it to check Python files before committing them or to clean up reported lint errors.
Why use it?
It finds lint errors early and can fix them according to the project's existing rules.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is Mjvolk3/torchcell's own configuration. It tells Claude Code how to work on torchcell itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything torchcell configures →

not rated 3repo changed 1mo ago A scan 22 tokens no licence
View source ↗ Mjvolk3/torchcell
Reuse

Borrowing it

Nothing to install: this file belongs to Mjvolk3/torchcell. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Mjvolk3/torchcell/main/.claude/skills/ruff/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Mjvolk3/torchcell

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 ruff

README.md
[![agentmods](https://agentmods.dev/badge/skills/mjvolk3/torchcell/ruff/github.svg)](https://agentmods.dev/skills/mjvolk3/torchcell/ruff)
Your own site
<a href="https://agentmods.dev/skills/mjvolk3/torchcell/ruff"><img src="https://agentmods.dev/badge/skills/mjvolk3/torchcell/ruff/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 ruff

Your own site · 80×15
<a href="https://agentmods.dev/skills/mjvolk3/torchcell/ruff"><img src="https://agentmods.dev/badge/skills/mjvolk3/torchcell/ruff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,145 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 unknown 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 $0.00022 $0.01145
Opus 5.5 $0.00009 $0.00458
Sonnet 5.5 $0.00004 $0.00229
Haiku 4.5 $0.00002 $0.00114

Measured 1mo ago against content hash ca2403da56c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ruff 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.

.claude/skills/ruff/SKILL.md · 117 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 Changed ca2403da56c5
  2. 2mo ago First seen · 117 lines · 22 tokens per session scan A 520188ec17d4

Subscribe to this mod's changes

ruff is a skill published in the GitHub repository Mjvolk3/torchcell (3 stars, last pushed 3d ago), with no licence file. It adds 22 tokens to every session and 1,145 once invoked, about $0.0001 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 2026-08-31.

Code reviewLanguagesPython
Related

ruff compared with skills from other repositories

ruff next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
ruffMjvolk3/torchcellSkill33d agononeA22Claude Code
mcore-linting-and-formattingNVIDIA/skillsSkill3.9kyesterdayApache-2.0A44Claude Code
python-review-checklistawslabs/cli-agent-orchestratorSkill1.5kyesterdayApache-2.0A20Claude Code, Codex
splitting-oversized-modulesPostHog/posthog-fossSkill728yesterdayMITA197Claude Code, Codex
splitting-oversized-modulesPostHog/posthogSkill41kyesterdaynoneA197Claude Code, Codex
best-practicesFradSer/dotclaudeSkill5962d agoMITA52Claude Code
plankton-code-qualityloulanyue/awesome-claude-notesSkill2711mo agoMITA34Claude Code