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Code Simplifier for Codex

Codex-native packaging of Anthropic's code-simplifier Claude Code agent as an installable Codex skill.

This repository is intentionally small: it contains only the Codex skill, install/validation scripts, license, and attribution. It is not a fork and does not carry the upstream plugin repository layout.

Install

git clone https://github.com/aalvsz/code-simplifier-codex.git
cd code-simplifier-codex
./scripts/install.sh

Then start a new Codex session or reload skills and invoke:

$code-simplifier

Example:

Use $code-simplifier to simplify the code I just changed while preserving behavior.

What It Does

The skill preserves the upstream simplifier behavior:

  • Preserve exact functionality.
  • Follow local project standards.
  • Reduce unnecessary complexity, nesting, redundancy, and unclear naming.
  • Avoid nested ternaries and overly clever one-liners.
  • Focus on recently modified code unless asked to inspect a broader scope.
  • Verify that the result is simpler and behavior-preserving.

Codex skill metadata only supports name and description in SKILL.md, so the upstream Claude-only model: opus field is intentionally omitted.

Validate

./scripts/validate.sh

Attribution

Adapted from Anthropic's code-simplifier agent in anthropics/claude-plugins-official:

https://github.com/anthropics/claude-plugins-official/blob/main/plugins/code-simplifier/agents/code-simplifier.md

Original source is licensed under Apache-2.0.