Simplify Codebase
Simplify Codebase is an agent skill (a SKILL.md file) from tt-a1i/simplify-codebase. Simplification audit or authorized codebase simplification whose stated objective is to remove accidental complexity. It works with Claude Code and Codex and has 504 GitHub stars. Install it by copying the skill folder into your agent's skills directory.
- 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/tt-a1i/simplify-codebase.git
cp -r simplify-codebase ~/.claude/skills/simplify-codebase # personal, or .claude/skills in a projectIn the Claude apps, zip the simplify-codebase 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/tt-a1i/simplify-codebase.git
cp -r simplify-codebase .agents/skills/simplify-codebase # 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/tt-a1i/simplify-codebase.git
cp -r simplify-codebase .cursor/skills/simplify-codebase # 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
Simplification audit or authorized codebase simplification whose stated objective is to remove accidental complexity. Use for evidence-backed deletion or consolidation of dead code, duplicate state, redundant APIs or layers, ownerless abstractions, obsolete compatibility or design records, and over-engineering in any language; also use for 代码简化 or 熵回收. Do not use for general code review, onboarding, style-only refactoring, or performance tuning.
When it triggers
- Use for evidence-backed deletion or consolidation of dead code, duplicate state, redundant APIs or layers, ownerless abstractions, obsolete compatibility or design records, and over-engineering in any language; also use for 代码简化 or 熵回收.
- use for general code review, onboarding, style-only refactoring, or performance tuning.
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What is the Simplify Codebase skill?
Simplify Codebase is an agent skill (a SKILL.md file) from tt-a1i/simplify-codebase. Simplification audit or authorized codebase simplification whose stated objective is to remove accidental complexity. It works with Claude Code and Codex and has 504 GitHub stars. Install it by copying the skill folder into your agent's skills directory. Its SKILL.md lives at github.com/tt-a1i/simplify-codebase.
How do I install the Simplify Codebase skill?
Copy the simplify-codebase 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 Simplify Codebase skill free?
Yes. The repository is open source under the MIT license.
Is Simplify Codebase maintained?
The repository's most recent commit was on Sep 4, 2026. appsgit only lists skills from repositories with a commit in the last six months.