fact-check

fact-check is a skill for Claude Code, Codex from ImpactMojo/ImpactMojo. It costs 56 tokens per session (1,670 once invoked), scanned A, original, no licence file.

A content-review tool for checking factual claims across the ImpactMojo learning platform. ImpactMojo publishes blog posts, courses, practical labs, games, and book summaries.

In plain words
What is it for?
Use it when asked to fact-check, verify, or review ImpactMojo content for errors.
Why use it?
It helps find factual errors during individual reviews or recurring content audits, so claims do not have to be checked manually from scratch.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/impactmojo/impactmojo/fact-check
Any agent
npx skills add ImpactMojo/ImpactMojo --skill fact-check
Clone the repo
git clone --depth 1 https://github.com/ImpactMojo/ImpactMojo

Made for: Claude Code, Codex.

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 fact-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/impactmojo/impactmojo/fact-check.svg)](https://agentmods.dev/skills/impactmojo/impactmojo/fact-check)
Your own site
<a href="https://agentmods.dev/skills/impactmojo/impactmojo/fact-check"><img src="https://agentmods.dev/badge/skills/impactmojo/impactmojo/fact-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,670 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00056 $0.01670
Opus 5 $0.00028 $0.00835
Sonnet 5 $0.00011 $0.00334
Haiku 4.5 $0.00006 $0.00167

Measured 4d ago against content hash 746e20ddef7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fact-check 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 4d 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/fact-check/SKILL.md · 133 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 4d ago First seen · 133 lines · 56 tokens per session scan A 746e20ddef7e

Subscribe to this mod's changes

fact-check is a skill published in the GitHub repository ImpactMojo/ImpactMojo (2 stars, last pushed 6d ago), with no licence file. It adds 56 tokens to every session and 1,670 once invoked, about $0.0003 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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