# Axis Validation

> SOP for validating that candidate axes are independent and meaningful.

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

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# Axis Validation

Verify that candidate dimensions are truly independent and meaningful.

## Tool

`vault_query_graph` + `vault_search`

## Protocol

1. For each pair of candidate dimensions, check: can one change without the other changing?
2. Search literature for examples where dimensions vary independently
3. If dimensions always co-vary, merge them into one
4. If a dimension has only 1 value in practice, it's not a useful dimension — remove it

## HARD-GATE

<HARD-GATE>
Must test pairwise independence for all candidate dimensions.
</HARD-GATE>

## Yield

Returns: `{ validated: string[], merged: string[], removed: string[] }`