# Review Dry > Review codebase for DRY (duplication) issues Use when this capability is needed. - Skill: `tomevault-io/review-dry` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/review-dry` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/review-dry/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/review-dry --- # DRY review — duplication, single source of truth Review the target codebase with a DRY lens and report **actionable** duplication. ## Scope Use `$ARGUMENTS` to decide scope: - If it mentions `git diff` / PR / commit: focus on changed areas first. - If it mentions a path: review that subtree. - If empty: scan the repository for high-impact duplication. ## What to look for (examples) - Duplicated **types/interfaces** across packages - Duplicated **constants** (paths, magic strings, category metadata, colors) - Duplicated **validation** rules / parsing logic - Repeated **error messages** and CLI usage guidance - Copy-pasted **command steps** (install/build/serve) ## Output format Produce: 1. **Top duplications (priority order)** - Evidence: file paths + short excerpt references - Why it hurts (change amplification / inconsistency risk) - Smallest refactor that removes duplication (shared module, helper, constant) 2. **Quick wins** (low effort, high payoff) 3. **Risks of over-abstraction** (what NOT to DRY) $ARGUMENTS --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/yida29) — claim your Tome and manage your conversions.