# Skill Diff Analyzer

> Compare Skill versions and explain contract, dependency, and behavior impact — use when assessing changes between two Skills.

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

---


## Contract

- **Input:** problem or task defined by the skill body.
- **Output:** Markdown artifact or structured result with completion criteria met.
- **Side effects:** none (design/review/documentation only unless explicitly stated).
- **Dependencies:** none (self-contained unless linked to other skills).
- **Stop condition:** all process steps completed; artifact saved; criteria checked.
- **Risk:** low.
- **Boundary:** produces reasoning or documentation artifacts; does not modify external systems unless explicitly instructed.


# Skill Diff Analyzer

## Contract

- Input: two readable `SKILL.md` files.
- Output: frontmatter changes, content additions/removals, dependency impact, and review recommendation.
- Boundary: compare files without editing either version.

Run `node .agents/skills/platform/skill-lab.mjs diff <old>/SKILL.md <new>/SKILL.md`. Treat changes to dependencies, side effects, or risk as review-required, and inspect additions/removals for accidental contract drift.