🔍 What does this skill do?

The Text Polygraph Analyzer examines an email, a letter, or a written statement and separates what can be checked from what cannot, detects contradictions —internal ones and against what you already know— and hands you a plan of questions and documents to get to the truth. That said, let's be clear: in a text it is very hard to determine whether something is true or a lie, and the final call is yours. This is not the same as a real polygraph, whose effectiveness studies place —depending on the person, the case, and who runs the test— in an approximate range of 80% to 98%. This skill does not give you a verdict or a fake sincerity score: it gives you the fieldwork so you can decide with judgment. Skill developed by elpoligrafo.es.

🔎 Need to get to the truth and you're in Spain? El Polígrafo can help you with a professional test.

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What is checkable
Sorts each claim into verifiable, non-verifiable, or "only checkable by the writer," with the verifiability ratio as a plain count.
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Contradictions
Flags what clashes inside the text and against the facts you already know, and always offers the most plausible innocent explanation.
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What the text dodges
Points out unanswered questions, specificity that dissolves right where it matters, and data that should be there but isn't.
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Contrast plan
A script of questions in order and which documents to request, using Strategic Use of Evidence so you don't reveal what you already know.

⚙️ How to install

$ Quick install (one-liner) 
git clone https://github.com/aulatina/analizador-poligrafo-texto.git ~/.claude/skills/analizador-poligrafo-texto
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Quick option: clone it from GitHub
If you have git installed, a single command installs it into your skills folder:
git clone https://github.com/aulatina/analizador-poligrafo-texto.git ~/.claude/skills/analizador-poligrafo-texto
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No git? Download the ZIP from GitHub
Open the repository, click the green «Code» button → «Download ZIP», and unzip the contents into your skills folder:
~/.claude/skills/analizador-poligrafo-texto/
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Restart Claude Code or Cowork
Close and reopen the app. Claude will detect the skill automatically.
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Paste the text and the context
Provide the text to analyze, the facts you already know for certain, and the specific question you want answered. The more context, the more useful the analysis.

💬 Usage examples

📧 Suspicious email
Analyze this email from my supplier: separate what's checkable from what isn't and tell me what I should ask.
📄 Written statement
I have a tenant's written statement. Detect contradictions against these dates I already know and give me the innocent explanation for each one.
🔍 Contradictions
Compare this message against what I already know (I'll give you the data) and point out exactly where it doesn't add up.
🗂️ Question script
Give me a script of questions, in order, to test this account without revealing yet what I already know.

🛠️ Features

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Verifiability approach Classifies each claim by whether a third party, a document, or a record could confirm it. The best-supported verbal method.
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Contradiction detection Three levels: against the facts you already know, against the author's previous texts, and within the text itself.
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What the text leaves out Describes the gaps without imputing intent: unanswered questions and specificity that drops right where it matters.
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Contrast plan (SUE) Between 5 and 10 actions: what to ask, in what order, and when to introduce the evidence you already hold.
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No invented verdicts It never gives you a fake "X% sincerity" or claims someone is lying. The final call is yours, with judgment.

❓ Frequently asked questions

No, and be wary of any tool that claims it does. In an isolated text there is no validated method to deduce deception. This skill shows you what to check, what doesn't add up, and what to ask; you make the final call with judgment.
A polygraph measures physiological responses in a controlled test, and its effectiveness —depending on the studies, the person, the case, and who runs it— sits in an approximate range of 80% to 98%. A written text offers none of those signals, so here we don't talk about sincerity percentages, but about verifiability and contradictions.
This skill was developed by elpoligrafo.es (https://elpoligrafo.es/en/), specialists in verification and credibility analysis.
No. This analysis does not replace legal advice, documentary verification, or professional expert assessment. It is a tool to guide your own checking work.
The text to analyze and, above all, the facts you already know for certain (dates, amounts, documents, previous messages). Without that context it can't detect contradictions, which is the most valuable layer.
Text Polygraph Analyzer

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