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Clean Code Framework

A Clean Code review skill that scores your code 0-10 on naming, function size, error handling and tests, then lists the exact fixes to reach 10/10.

Dev & CodingIntermediate★ 2,386⑂ 241AI score 9/10Last updated: Sep 10, 2026

What it does

Turns Robert C. Martin's Clean Code principles into an operational review checklist.

  • Six disciplines: meaningful names, small functions, comments & formatting, error handling, unit testing, code smells
  • 0-10 scoring rubric with the specific improvements needed to reach 10/10
  • Context→pattern→example tables: flag argument → split into two functions; return null → Optional or empty collection; magic number → named constant
  • Quick diagnostic: ten yes/no questions (functions under 20 lines? tests under 10 seconds?) each with a prescribed action
  • Deep dives delegated to references/ files for naming, functions, comments, error handling, testing and smells

Who it's for

  • Developers and tech leads who want a consistent readability standard in pull-request reviews
  • Anyone untangling legacy code who needs the hot spots named before touching them
  • Junior engineers learning craftsmanship principles in a structured way

Examples

  1. "This function is too long — clean it up" → step-extraction plan plus guard clauses for the error paths
  2. "Review this PR for readability" → a score with a prioritized list covering names, duplication and magic numbers
  3. "My tests are a mess" → Arrange-Act-Assert structure, shouldRejectExpiredToken-style names, builder helpers for setup

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/wondelai/skills/HEAD/clean-code/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the clean-code folder from the GitHub repo wondelai/skills into my ~/.claude/skills/clean-code/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/wondelai/skills.git /tmp/wondelai-skills && mkdir -p ~/.claude/skills && cp -r /tmp/wondelai-skills/clean-code ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repository into a temp folder: git clone https://github.com/wondelai/skills.git /tmp/wondelai-skills
  3. Make sure the skills folder exists: mkdir -p ~/.claude/skills
  4. Copy the skill over: cp -r /tmp/wondelai-skills/clean-code ~/.claude/skills/
  5. Verify with ls ~/.claude/skills/clean-code — you should see SKILL.md and a references/ directory.
  6. Restart Claude Code and try a prompt like "score this function against clean code principles" to trigger the skill.
View source on GitHub ↗License: MIT