# Probe Duplicate

> PROBE FIXTURE side A. Two plugins ship a skill with this exact directory name and this exact skill name. Invoke it and read which side answers - that is the whole experiment.

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

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# Probe duplicate, side A

When invoked, state exactly: **"I am side A."** and stop.

Do nothing else. The only information this skill carries is which copy of it the runtime resolved.