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blog-factcheck

100 / 100 · Low risk

Fine to try.

By infrasity-labs/dev-gtm-claude-skills (GitHub) · research · 164 stars · scanned at commit 02cfefb

Verify statistics and claims in blog posts by fetching cited source URLs and checking if the claimed data actually appears on the page. Extracts all statistical claims (numbers, percentages, named sources), fetches each cited URL via WebFetch, and scores match confidence (exact match 1.0, paraphrase 0.7-0.9, not found 0.0). Flags uncited claims as UNVERIFIED. Use when user says "fact check", "verify statistics", "check sources", "validate claims", "factcheck", "source verification".

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Other copies in this repository

infrasity-labs/dev-gtm-claude-skills has 1 more folder with a skill named blog-factcheck. This page shows the lowest-scoring copy.

• plugins/writing-skills/skills/blog-factcheck 100/100 · Low risk

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'blog-factcheck' ] || [ -L ~/.agents/skills/'blog-factcheck' ]; then echo 'A skill folder named blog-factcheck already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/infrasity-labs/dev-gtm-claude-skills' "$d" && git -C "$d" checkout --quiet '02cfefb3a213041de8b80bc659ebc5f17b5e746a' -- '.claude/skills/blog-factcheck' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/blog-factcheck' ~/.agents/skills/'blog-factcheck' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'blog-factcheck' ~/.claude/skills/'blog-factcheck' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for infrasity-labs/dev-gtm-claude-skills shows the score of its lowest-scoring skill.

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Score history

Also found in

Identical copies of this skill exist at:

• infrasity-labs/dev-gtm-claude-skills/writing-skills/blog-factcheck