Jscpd
Jscpd is an agent skill (a SKILL.md file) from kucherenko/jscpd. Copy-paste detector for 220+ languages. Detect exact, renamed and near-miss duplicated code, measure duplication percentages, and find refactoring hotspots with the codebase summary. It works with Claude Code and has 6,346 GitHub stars across a repository of 3 listed skills.
github.com/kucherenko/jscpd/skills/jscpd (opens in a new tab)
- Multi-skill repo
- Docs & writing
- Actively maintained
Add this skill
Claude
Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):
git clone --depth 1 https://github.com/kucherenko/jscpd.git
cp -r jscpd/skills/jscpd ~/.claude/skills/jscpd # personal, or .claude/skills in a projectIn the Claude apps, zip the jscpd folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).
ChatGPT / Codex
Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:
git clone --depth 1 https://github.com/kucherenko/jscpd.git
cp -r jscpd/skills/jscpd .agents/skills/jscpd # repo; ~/.agents/skills for all projectsStandalone skills also load in the ChatGPT desktop app.
Cursor
Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:
git clone --depth 1 https://github.com/kucherenko/jscpd.git
cp -r jscpd/skills/jscpd .cursor/skills/jscpd # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)
What this skill does
Copy-paste detector for 220+ languages. Detect exact, renamed and near-miss duplicated code, measure duplication percentages, and find refactoring hotspots with the codebase summary. Copy-paste detector for programming source code, supports 220+ languages. Use this skill to run jscpd and understand its output.
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3 skills are listed from this repository.
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What is the Jscpd skill?
Jscpd is an agent skill (a SKILL.md file) from kucherenko/jscpd. Copy-paste detector for 220+ languages. Detect exact, renamed and near-miss duplicated code, measure duplication percentages, and find refactoring hotspots with the codebase summary. It works with Claude Code and has 6,346 GitHub stars across a repository of 3 listed skills. Its SKILL.md lives at github.com/kucherenko/jscpd/skills/jscpd.
How do I install the Jscpd skill?
Copy the jscpd folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.
Is the Jscpd skill free?
Yes. The repository is open source under the MIT license.
Is Jscpd maintained?
The repository's most recent commit was on Oct 7, 2026. Its latest release is v5.4.0. appsgit only lists skills from repositories with a commit in the last six months.