agricidaniel/claude-blog · brain/.raw/sources/claude-blog-skill/skills/blog-factcheck/SKILL.md

blog-factcheck skillA

blog-factcheck is agent-read markdown (skill) from agricidaniel/claude-blog: 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 load-bearing claims (statistics, product or policy claims, ranking and comparative claims, named sources), validates cited URLs before fetching, 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".

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add agricidaniel/claude-blog/blog-factcheck@git:20260709.9bf0b3e
Exact content
mdr add agricidaniel/claude-blog/blog-factcheck@sha256:3cf3639e2d6d5abc

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_yjor62aqr4joeiz3.svg)](https://markdownregistry.com/a/art_yjor62aqr4joeiz3)

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Versions

versioncommittedcommitsizeaudit
git:20260709.9bf0b3e latest2026-07-09 9bf0b3e 8,668 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8668 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

agricidaniel/claude-blog · 2,080 stars · license MIT · pushed 2026-09-04 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_yjor62aqr4joeiz3
GET https://markdownregistry.com/api/v1/resolve?ref=agricidaniel/claude-blog/blog-factcheck
GET https://markdownregistry.com/api/v1/blob/3cf3639e2d6d5abc424a73c6ba9a494839addd82f0c589aef92b347f4ba944fa