Logic Check

Q: What is a Claude Code skill and how does the Logic Check skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Logic Check is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: business-ops · Last updated: 2026-07-24

type:audit type:review

Audit a verifiable, step-wise computation (arithmetic, financial calculation, algorithm trace, constraint solve, scheduling problem) by having the reviewer independently re-derive the answer from the original problem statement and comparing — not by asking the reviewer to "check the work," which anchors on the existing derivation. Use when the user says "audit this calculation," "double-check my math with the reviewer," "verify these computations," "check this trace," "is this cap table right," "re-derive this with the reviewer," "audit my arithmetic," "logic-check this," or "is this number right." Also offer this proactively when the active primary has just performed a long multi-step calculation, an algorithmic trace (DP table, graph traversal, constraint propagation), a financial computation (cap table, tax math, unit conversion, currency-adjusted aggregate), or any computation where a wrong intermediate state silently corrupts the final answer.

Security AStatic scan found no risk patternsHow grading works ›

About this skill (catalog notes)

Logic Check includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); worked examples; pricing or quota commentary. At roughly 2,251 words the SKILL.md is on the longer end of the catalog distribution.

Original author: sumitake
Indexed lastmod: 2026-07-24
Catalog position: General · business-ops
Indexed related skills: 10

How Logic Check fits the catalog

Logic Check sits in the General category under the business-ops sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

What this skill does

Logic Check is a community-contributed Claude Code skill in the business-ops sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/logic-check/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user says "audit this calculation," "double-check my math with the reviewer," "verify these computations," "check this trace," "is this cap table right," "re-derive this with the reviewer," "audit my arithmetic," "logic-check this," or "is this number right." Also offer this proactively when the active primary has just performed a long multi-step calculation, an algorithmic trace (DP table, graph traversal, constraint propagation), a financial computation (cap table, tax math, unit conversion, currency-adjusted aggregate), or any computation where a wrong intermediate state silently corrupts the final answer.

Who uses this skill

The Logic Check Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 191,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/logic-check
curl -L https://claudskills.com/skills/logic-check/SKILL.md \
  -o ~/.claude/skills/logic-check/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/logic-check/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/logic-check/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\logic-check\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Logic Check Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/logic-check/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Logic Check skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Logic Check skill?

Use Logic Check when your Claude Code task falls under the General category — specifically in the business ops area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Logic Check" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Logic Check skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Logic Check is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/sumitake/agent-collab/blob/HEAD/plugins/agent-collab/skills/logic-check/SKILL.md
Author: sumitake

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

sumitake. (2026). Logic Check [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/logic-check/

BibTeX

@misc{logic-check-2026,
  author    = {sumitake},
  title     = {Logic Check [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/logic-check/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/logic-check.svg)](https://claudskills.com/skills/logic-check/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-08-26 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/logic-check/#security)

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Browse all General skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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