MCPInstall

fact-check

Verify a specific claim by searching for evidence across web and academic sources. Use when the user asks to verify, fact-check, or confirm a statement.

Installs
260
Last 24h
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/collaborative-deep-research/agent-papers-cli --skill fact-check
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads fact-check automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Fact-check the following claim: "$ARGUMENTS"

1. Decompose

Break the claim into specific, verifiable sub-claims. List them explicitly before searching.

2. Search for Evidence

For each sub-claim:

paper-search google web "<sub-claim as question>"
paper-search semanticscholar snippets "<sub-claim keywords>"
paper-search semanticscholar papers "<sub-claim keywords>" --limit 5

3. Verify Sources

For each promising source:

paper read <arxiv_id> <relevant section>   # for academic papers
paper-search browse <url>                   # for web pages

Prefer primary sources (original papers, official data) over secondary reports.

4. Assess

For each sub-claim, assign a verdict:

  • Supported: strong evidence from multiple reliable sources
  • Partially supported: some evidence, with caveats
  • Unsupported: no evidence found, or evidence contradicts the claim
  • Uncertain: insufficient evidence to judge

5. Report

Present:

  • The original claim
  • Each sub-claim with its verdict and supporting evidence
  • An overall assessment
  • All sources cited with URLs

Guidelines

  • Always cite specific sources — never state a verdict without evidence.
  • Distinguish between "no evidence found" and "evidence contradicts."
  • Note the quality and recency of sources.
  • If a claim is about a specific paper, read that paper directly rather than relying on summaries.

FAQ

What does the fact-check skill do?

Verify a specific claim by searching for evidence across web and academic sources. Use when the user asks to verify, fact-check, or confirm a statement.

How do I install fact-check?

Run npx skills add https://github.com/collaborative-deep-research/agent-papers-cli --skill fact-check in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/fact-check/ (personal) or .claude/skills/fact-check/ (project).

Which AI agents can use fact-check?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is fact-check safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains fact-check?

It is published by collaborative-deep-research in collaborative-deep-research/agent-papers-cli. It has 260 recorded installs.

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