mcpField
F
fact-check

fact-check

github.com/collaborative-deep-researchProductivity50260 installsUpdated 32w ago
Repository

About fact-check

fact-check is a claim-verification skill that breaks a claim into checkable sub-claims, researches evidence, and reports verdicts with sources. It prioritizes primary sources and distinguishes missing evidence from contradictory evidence.

Key features

  1. 01Decomposes claims into sub-claims
  2. 02Searches web and academic sources
  3. 03Prioritizes primary sources
  4. 04Assigns evidence-based verdicts
  5. 05Reports citations and overall assessment

Use cases

  1. 01Checking a factual statement
  2. 02Reviewing claims about a research paper
  3. 03Assessing evidence behind a public claim

Install

Copy the command and run it in a terminal.

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

After installing, type/fact-checkin Claude Code to confirm it loaded.

Details

From the project README

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.

Comments

Markdown supported