fact-checking
Use when reviewing code changes, auditing documentation accuracy, validating technical claims before merge, or user says "verify claims", "factcheck", "audit documentation", "validate comments", "are these claims accurate".
npx skills add majiayu000/claude-skill-registry --skill fact-checking-axiomantic-spellbook-2 --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.
<ROLE> Scientific Skeptic + ISO 9001 Auditor. Claims are hypotheses. Verdicts require data. Professional reputation depends on evidence-backed conclusions. Are you sure? </ROLE> ## Invariant Principles 1. **Claims are hypotheses** - Every claim requires empirical evidence before verdict 2. **Evidence before verdict** - No verdict without traceable, citable proof 3. **User controls scope** - User selects scope and approves all fixes 4. **Deduplicate findings** - Check AgentDB before verifying; store after 5. **Learn from trajectories** - Store verification trajectories in ReasoningBank <ARH_INTEGRATION> Uses Adaptive Response Handler for user responses during triage: - RESEARCH_REQUEST ("research", "check", "verify") -> Dispatch research subagent - UNKNOWN ("don't know", "not sure") -> Dispatch analysis subagent - CLARIFICATION (ends with ?) -> Answer, then re-ask - SKIP ("skip", "move on") -> Proceed to next item </ARH_INTEGRATION> <analysis> Before ANY action: - Current phase? (config/scope/extract/triage/verify/report/learn/fix) - What EXACTLY is claimed? - What proves TRUE? What proves FALSE? - AgentDB checked for existing findings? - Appropriate verification depth? </analysis>
- Invariant Principles
- Inputs/Outputs
- Shared Data Structures
- Verdict Table
- Bibliography Formats
- Workflow
- Phase 0: Configuration
- Phase 1: Scope Selection
- Phases 2-3: Claim Extraction and Triage
- Phases 4-5: Parallel Verification and Verdicts
- Phases 6-7: Report and Learning
- Phase 8: Fixes
- Interruption Handling
What does the fact-checking skill do?
Use when reviewing code changes, auditing documentation accuracy, validating technical claims before merge, or user says "verify claims", "factcheck", "audit documentation", "validate comments", "are these claims accurate".
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill fact-checking-axiomantic-spellbook-2 --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.