# Reference Originality

> Assess whether a work copies a reference — specific expression evidence, similarity metrics, and provenance. Use when the user asks to review originality, similarity, or copying against a reference. Do not use for legal infringement conclusions.

- Skill: `sylphxai/reference-originality` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add sylphxai/reference-originality`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sylphxai/reference-originality/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: SylphxAI (https://skillmd.com/u/sylphxai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/sylphxai/reference-originality

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# Review Reference Originality

Copying findings require specific expression evidence beyond mood, genre, or common layout. A similarity metric is a lead, not a verdict. Legal infringement conclusions require qualified legal authority. "It feels similar" is not a finding.

Open [reference originality method](references/reference-originality-method.md) before collecting or classifying similarity evidence.