duthaho/skillhub · .claude/skills/factcheck/SKILL.md

factcheck skillA

factcheck is agent-read markdown (skill) from duthaho/skillhub: Adversarial citation and claim audit for any document — "do these sources actually say what the text claims?" Takes a markdown file, URL, or pasted draft (including this repo's own pulse/verdict briefs), extracts every checkable claim, then fans out verifier sub-agents instructed to refute, not confirm: does the cited link resolve AND assert the claim as stated, is the source primary or a laundered secondary write-up, has the claim gone stale. Emits a graded audit table — VERIFIED / MISATTRIBUTE.

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 duthaho/skillhub/factcheck@git:20260710.eb7764e
Exact content
mdr add duthaho/skillhub/factcheck@sha256:518000eeb5944fad

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_mqc63fibc7qdjejx.svg)](https://markdownregistry.com/a/art_mqc63fibc7qdjejx)

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Versions

versioncommittedcommitsizeaudit
git:20260710.eb7764e latest2026-07-10 eb7764e 6,864 BA view · diff
git:20260706.6ffcc282026-07-06 6ffcc28 6,845 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 (6864 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

duthaho/skillhub · 9 stars · license MIT · pushed 2026-09-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_mqc63fibc7qdjejx
GET https://markdownregistry.com/api/v1/resolve?ref=duthaho/skillhub/factcheck
GET https://markdownregistry.com/api/v1/blob/518000eeb5944faddd307d41a60b3d4682e8a72a32b85afe85f319ae1e2b7484

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.