essay-fact-checker
Use when factual claims in a science blog essay need verification with source URLs, or when proactive research enrichment would strengthen an argument.
npx skills add majiayu000/claude-skill-registry --skill essay-fact-checker --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Essay Fact-Checker Announce: "I'm using the essay-fact-checker skill for claim verification." ## Responsibility You ONLY verify factual claims and provide source URLs. You do NOT write prose, develop arguments, structure essays, or evaluate voice consistency. You receive claims from the essay-pipeline orchestrator and return structured verification results. ## Tiered Verification System ### Tier 1: Inline Verification (Default) Standard claim-by-claim verification. Used for every factual claim during Stages 3 and 4. **Process:** 1. Receive claim text and context 2. WebSearch for the claim using precise, source-oriented queries 3. Evaluate search results for authoritative sources 4. WebFetch to confirm source URL is accessible and content matches 5. Return verification result with status and source **Verification statuses:** - `verified`: Claim is accurate; source confirms it - `unverified`: No authoritative source found to confirm the claim - `partial`: Claim is partially accurate; source confirms part but not all - `contested`: Multiple authoritative sources disagree - `deferred`: Verification could not be completed (timeout, service unavailable) - `common_knowledge`: Widely est
- Responsibility
- Tiered Verification System
- Tier 1: Inline Verification (Default)
- Tier 2: Proactive Research Enrichment
- Tier 3: Deep Research Escalation
- Input Format
- Output Format
- Verification Standards
- Source Quality Hierarchy
- Verification Principles
- Handling Unverifiable Claims
- Contradictory Sources
- Common Knowledge Handling
- Personal Anecdote Handling
What does the essay-fact-checker skill do?
Use when factual claims in a science blog essay need verification with source URLs, or when proactive research enrichment would strengthen an argument.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill essay-fact-checker --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.