factcheck SKILL.md skillA
factcheck from duthaho/skillhub is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add duthaho/skillhub/factcheck@git:20260710.eb7764ePins git:20260710.eb7764e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- duthaho/skillhub
- Path
.claude/skills/factcheck/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260710.eb7764e, committed Jul 10, 2026
- First version recorded
- Jul 6, 2026
- Size
- 6,864 bytes
- Repository stars
- 9
- License
- MIT
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 /…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# factcheck — do the sources say that? `/factcheck <path | URL>` — audit a document's claims against its sources `/factcheck <path> focus <section/topic>` — audit only part of a long document Answer one question: **for each claim this document makes, is there a source that actually asserts it?** The documented failure mode of cited writing — human and agent alike — is not missing links; it's links that resolve to pages that *don't say that*. A working URL is the weakest form of evidence there is. This audit replaces "it has citations" with "here is the passage." ## Step 0 — Scope the audit Read the document (WebFetch if a URL; ask for a paste if it's paywalled). Then size the job and say which tier you picked: - **Small** (≤ ~10 checkable claims): verify inline, no sub-agents — the fan-out below would cost more than it saves. - **Standard**: fan out, batching ~5–8 claims per verifier. - **Focused**: the user named a section or topic → extract only there, note in the audit header that the rest was not examined. If the document has **no citations at all**, say so up front — the audit's question shifts from "does the cited source say this" to "does support for …
Read the whole file at its exact version.
How to install
mdr add duthaho/skillhub/factcheck@sha256:518000eeb5944fadThe line at the top of this page pins the label git:20260710.eb7764e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mqc63fibc7qdjejx)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 6, 2026 and Jul 10, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.eb7764e latest | 2026-07-10 | eb7764e | 6,864 B | A | view · diff |
| git:20260706.6ffcc28 | 2026-07-06 | 6ffcc28 | 6,845 B | A | view |
Audit of the latest version
- 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
duthaho/skillhub · 9 stars · license MIT · pushed 2026-10-31 · 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
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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