Codebase Refactoring
Codebase Refactoring is an agent skill (a SKILL.md file) from kucherenko/jscpd. Three-part workflow to improve overall codebase health with jscpd — find and fix duplicated code, find and remove or refactor dead code, then find and simplify the largest/most complex files. It works with Claude Code and has 6,346 GitHub stars across a repository of 3 listed skills.
github.com/kucherenko/jscpd/skills/codebase-refactoring (opens in a new tab)
- Multi-skill repo
- Coding
- 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/codebase-refactoring ~/.claude/skills/codebase-refactoring # personal, or .claude/skills in a projectIn the Claude apps, zip the codebase-refactoring 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/codebase-refactoring .agents/skills/codebase-refactoring # 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/codebase-refactoring .cursor/skills/codebase-refactoring # 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
Three-part workflow to improve overall codebase health with jscpd — find and fix duplicated code, find and remove or refactor dead code, then find and simplify the largest/most complex files. Starts from --dashboard/--health to prioritize and ends by re-measuring the score. A guided pass over a codebase's three biggest maintenance costs — duplicated code, dead code, and complexity — using jscpd to find each and a strategy to fix it.
More skills in kucherenko/jscpd
3 skills are listed from this repository.
Similar skills
More coding skills
Requesting Code Review
obra/superpowers
Use when completing tasks, implementing major features, or before merging to verify work meets requirements.
CodingShellReceiving Code Review
obra/superpowers
Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not…
CodingShellImprove Codebase Architecture
mattpocock/skills
Scan a codebase for deepening opportunities, present them as a visual HTML report, then grill through whichever one you pick.
CodingShellSetup Matt Pocock Skills
mattpocock/skills
Configure this repo for the engineering skills: set up its issue tracker, triage label vocabulary, and domain doc layout.
CodingShellCode Review
mattpocock/skills
Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes: Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match…
CodingShellSetup Ts Deep Modules
mattpocock/skills
Wire dependency-cruiser into a TypeScript repo so each package is a deep module, with implementation hidden in subfolders and reachable only through its entry-point files.
CodingShell
What is the Codebase Refactoring skill?
Codebase Refactoring is an agent skill (a SKILL.md file) from kucherenko/jscpd. Three-part workflow to improve overall codebase health with jscpd — find and fix duplicated code, find and remove or refactor dead code, then find and simplify the largest/most complex files. 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/codebase-refactoring.
How do I install the Codebase Refactoring skill?
Copy the codebase-refactoring 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 Codebase Refactoring skill free?
Yes. The repository is open source under the MIT license.
Is Codebase Refactoring 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.