fact-checking
Skill1 starsChanged 59 days agoMITView on GitHub
Fact check statements, opinions, news articles, debates, speeches, quotes, or claims of any kind. Use this whenever the user asks to verify, check, confirm, or investigate whether something is true, accurate, or well-supported, or asks for a fact check of a piece of text, a person's remarks, or a specific claim.
6 other projects use a version of this.
Adopted by
Most recently taken up by
- github/squadtheir own version, first seen Nov 8, 2026
- axiomantic/spellbooktheir own version, first seen Nov 1, 2026
- KMaruthi2002/universal-llm-skillstheir own version, first seen Oct 25, 2026
- microsoft/github-vteam-industry-demostheir own version, first seen Oct 25, 2026
- nimadorostkar/Claude-Skills-collectiontheir own version, first seen Oct 13, 2026
- github/gh-awtheir own version, first seen May 27, 2026
Other versions6 projects use a version of this.
Word for word · 0
None found.
Edited · 0
None found.
Wrote their own version · 6
- github/gh-aw★ 5.6ksame name
- github/squad★ 3.4ksame name
- nimadorostkar/Claude-Skills-collection★ 33same name
- axiomantic/spellbook★ 11same name
- microsoft/github-vteam-industry-demos★ 2same name
- KMaruthi2002/universal-llm-skills★ 1same name
How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.
In this repository10 other files it gives its agents.
- notes/agents.mdAGENTS.md
- CLAUDE.mdCLAUDE.md
- claude-project-structureSkill
- code-philosophySkill
- writing-documentationSkill
- product-researchSkill
- professional-communicationSkill
- skill-creationSkill
- skill-refactoringSkill
- tooling-researchSkill
The file
We split this skill into the rules it gives an agent
2 rules. 0 are common, 2 are distinctive, and 0 are very specific to this project.
0
Common
Most of the 6 edited versions we read keep these.
2
Distinctive
This author's own choices. Worth a look.
0
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Distinctive: line 8
If the claim is ambiguous (unclear speaker, date, source, or version of a quote), ask the user to clarify rather than assuming the most …
- Distinctive: line 29
If asked to fact check something politically contested where reliable sources disagree or the matter is genuinely unsettled, say so …
“Common” is measured: kept by at least 6 in 10 of the 6 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
Rules:
- Every factual verdict must be backed by a search performed in this conversation. Never rely on training data alone to confirm or deny a claim; training data can be stale or wrong. If a claim cannot be checked with available tools, say so instead of guessing.
- If the claim is ambiguous (unclear speaker, date, source, or version of a quote), ask the user to clarify rather than assuming the most likely version.
Process:
- Isolate discrete claims. Long text (articles, speeches, debate transcripts) contains many checkable claims mixed with opinion and framing. Pull out the specific factual assertions before searching. Opinions and value judgments are not fact-checked as true/false; note them as opinion and move on, unless the user wants the reasoning behind them assessed.
- Search for each claim separately. Use web_search (and web_fetch on the most authoritative-looking result) per claim rather than one broad search for the whole text. Favor primary sources, official records, and reputable independent outlets over aggregators or partisan sites. Cross-check against at least two independent sources when a claim is contested or high-stakes.
- Rate each claim using this scale:
- True - directly confirmed by reliable sources.
- False - directly contradicted by reliable sources.
- Misleading - technically true but missing context that changes its meaning.
- Unverifiable - no reliable source confirms or denies it; state this rather than guessing.
- Opinion - not a factual claim, no verdict given.
- Cite sources for every verdict. Follow standard citation rules: no exact-quote reproduction beyond short attributed fragments, paraphrase content, cite where the claim was verified.
- Present results claim by claim, not as one blended paragraph, so the user can trace each verdict to its evidence. For a short single claim, this can just be a direct answer with sourcing. For a long document or speech, use a numbered list: claim, verdict, brief evidence, source.
- Stay neutral. Do not editorialize about the person or outlet who made the claim. Report what the evidence shows and let the rating speak for itself.
- If asked to fact check something politically contested where reliable sources disagree or the matter is genuinely unsettled, say so explicitly rather than forcing a True/False verdict.
Example:
User: "Can you fact check this line from a stump speech: 'Unemployment is the lowest it's been in 50 years'?"
Skill applied: search for the current rate and recent history, then answer directly rather than assuming.
"Verdict: False. The most recent BLS Employment Situation report puts the US unemployment rate at 4.2 percent in June 2026 (source: bls.gov). That is not close to a 50 year low. The rate has been below 4 percent multiple times in the last decade, and lower still in the late 1960s. If the claim was about a different country or time period, the specific figures would need to be rechecked against that context."
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Your trail
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

