Code Simplification
Code Simplification is an agent skill (a SKILL.md file) from addyosmani/agent-skills. Simplifies code for clarity. Use when refactoring code for clarity without changing behavior. It works with Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot and OpenCode and has 102,166 GitHub stars across a repository of 13 listed skills.
github.com/addyosmani/agent-skills/skills/code-simplification (opens in a new tab)
- Multi-skill repo
- Plugin marketplace
- Coding
- Actively maintained
Add this skill
Claude
This repository is a Claude Code plugin marketplace. In Claude Code:
/plugin marketplace add addyosmani/agent-skills
/plugin install agent-skills@addy-agent-skillsIn the Claude apps, zip the code-simplification 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/addyosmani/agent-skills.git
cp -r agent-skills/skills/code-simplification .agents/skills/code-simplification # 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/addyosmani/agent-skills.git
cp -r agent-skills/skills/code-simplification .cursor/skills/code-simplification # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (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
Simplifies code for clarity. Use when refactoring code for clarity without changing behavior. Use when code works but is harder to read, maintain, or extend than it should be. Use when reviewing code that has accumulated unnecessary complexity. Inspired by the Claude Code Simplifier plugin. Adapted here as a model-agnostic, process-driven skill for any AI coding agent.
When it triggers
- Use when refactoring code for clarity without changing behavior.
- Use when code works but is harder to read, maintain, or extend than it should be.
- Use when reviewing code that has accumulated unnecessary complexity.
More skills in addyosmani/agent-skills
13 skills are listed from this repository.
Code Review And Qualityaddyosmani/agent-skills
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What is the Code Simplification skill?
Code Simplification is an agent skill (a SKILL.md file) from addyosmani/agent-skills. Simplifies code for clarity. Use when refactoring code for clarity without changing behavior. It works with Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot and OpenCode and has 102,166 GitHub stars across a repository of 13 listed skills. Its SKILL.md lives at github.com/addyosmani/agent-skills/skills/code-simplification.
How do I install the Code Simplification skill?
In Claude Code, run /plugin marketplace add addyosmani/agent-skills and then /plugin install agent-skills@addy-agent-skills. For Codex or Cursor, copy the code-simplification folder into .agents/skills/ or .cursor/skills/.
Is the Code Simplification skill free?
Yes. The repository is open source under the MIT license.
Is Code Simplification maintained?
The repository's most recent commit was on Oct 3, 2026. Its latest release is 0.6.12. appsgit only lists skills from repositories with a commit in the last six months.