# Cross Checking

> Cross-references a specific topic, concept, or rule across all files to verify it is used consistently. Use when checking if a term or claim matches its authoritative definition everywhere, or when user says "cross-check", "is this consistent", "verify this term", or "does this match everywhere". Does NOT audit entire directories — use /auditing-physics or /auditing-canon for that.

- Skill: `alainator/cross-checking` (Agent Skill)
- Install (CLI): `npx skillmds@latest add alainator/cross-checking`
- Raw SKILL.md: https://api.skillmd.com/api/skills/alainator/cross-checking/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- Author: alainator (https://skillmd.com/u/alainator)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/alainator/cross-checking

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# Cross-Checking

Verify that a specific topic or rule is used consistently across the repo.

## Process

1. Find the authoritative source for the term/rule
2. `grep -r` to find all mentions across the repo
3. Compare each mention against the authoritative definition
4. Report matches, additions, and contradictions

## Rules

- Cross-civilization differences are NOT contradictions
- In-universe documents may intentionally differ from science documents
- Different eras may have different understandings

## Out of Scope

Does NOT audit entire directories (use /auditing-physics or /auditing-canon).
Does NOT write or modify files. Report only.