Code Duplication Detection

Q: What is a Claude Code skill and how does the Code Duplication Detection skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Code Duplication Detection is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Content category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Content · Sub-category: content-misc · Last updated: 2026-06-05

lang:python type:review

Detects duplicated and near-duplicate code across the codebase and suggests consolidation. Use when reviewing for copy-paste code, repeated logic, or DRY violations.

About this skill (catalog notes)

Code Duplication Detection is published as a SKILL.md file in this catalog. The SKILL.md is on the shorter side at about 215 words.

License: CC0-1.0
Original author: JeremyMorgan
Indexed lastmod: 2026-06-05
Catalog position: Content · content-misc
Indexed related skills: 10

How Code Duplication Detection fits the catalog

Code Duplication Detection sits in the Content category under the content-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Target: $ARGUMENTS

What this skill does

Code Duplication Detection is a community-contributed Claude Code skill in the content-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/code-duplication-detection/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when reviewing for copy-paste code, repeated logic, or DRY violations.

Who uses this skill

The Code Duplication Detection Claude Code skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/code-duplication-detection
curl -L https://claudskills.com/skills/code-duplication-detection/SKILL.md \
  -o ~/.claude/skills/code-duplication-detection/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/code-duplication-detection/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/code-duplication-detection/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\code-duplication-detection\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Code Duplication Detection Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/code-duplication-detection/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Code Duplication Detection skill do?

Detects duplicated and near-duplicate code across the codebase and suggests consolidation. Use when reviewing for copy-paste code, repeated logic, or DRY violations.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Code Duplication Detection skill?

Use Code Duplication Detection when your Claude Code task falls under the Content category — specifically in the content misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Code Duplication Detection" or describe the task and let Claude pick). Browse related skills at /category/content/.

What is a Claude Code skill and how does the Code Duplication Detection skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Code Duplication Detection is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Content category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/JeremyMorgan/code-review-skills/blob/HEAD/skills/code-duplication-detection/SKILL.md
License: CC0-1.0
Author: JeremyMorgan

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

JeremyMorgan. (2026). Code Duplication Detection [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/code-duplication-detection/

BibTeX

@misc{code-duplication-detection-2026,
  author    = {JeremyMorgan},
  title     = {Code Duplication Detection [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/code-duplication-detection/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/code-duplication-detection.svg)](https://claudskills.com/skills/code-duplication-detection/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)