Systematic Code Refactoring
luongnv89/claude-howto
Guides refactoring in phases based on Martin Fowler's method: research, test coverage check, planning and small tested steps, with your approval at each phase.
“Apply Robert C. Martin-inspired clean code rules when improving readability, naming, function design, responsibilities, or testable everyday code.”
Install Clean Code Rules
$ npx skills add ciembor/agent-rules-books --skill clean-code -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ciembor/agent-rules-books clean-code --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .claude/skills && cp -r skills-src/clean-code .claude/skills/clean-code && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .claude/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/ciembor/agent-rules-books/tree/main/clean-codeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add ciembor/agent-rules-books --skill clean-code -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ciembor/agent-rules-books clean-code --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .agents/skills && cp -r skills-src/clean-code .agents/skills/clean-code && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .agents/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ciembor/agent-rules-books --skill clean-code -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ciembor/agent-rules-books clean-code --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/clean-code .cursor/skills/clean-code && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .cursor/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/ciembor/agent-rules-books.git --path clean-code--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add ciembor/agent-rules-books --skill clean-code -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ciembor/agent-rules-books clean-code --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/clean-code .gemini/skills/clean-code && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .gemini/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install ciembor/agent-rules-books clean-codeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add ciembor/agent-rules-books --skill clean-code -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .github/skills && cp -r skills-src/clean-code .github/skills/clean-code && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .github/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ciembor/agent-rules-books --skill clean-code -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ciembor/agent-rules-books clean-code --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ciembor/agent-rules-books.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/clean-code .opencode/skills/clean-code && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "clean-code" agent skill from https://github.com/ciembor/agent-rules-books/tree/main/clean-code into .opencode/skills/clean-code/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clean-code", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
clean-code- GitHub stars
- 2.9k
- Token cost
- ~154 tokens
- SKILL.md length
- 53 words
- Files
- 4
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- MIT
At a glance
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
About this skill
Clean Code Rules is a skill in ciembor/agent-rules-books (2.9k stars). Its SKILL.md is about 154 tokens, with 3 other files in the folder. Licence: MIT.
What it can do on your machine
Read from SKILL.md and the folder at commit 893a88a. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Clean Code Rules loads about 154 tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 53 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from ciembor/agent-rules-books at commit 893a88a, republished under its MIT licence (© ciembor). 53 words, ~154 tokens.
Download SKILL.mdSave it as
.claude/skills/clean-code/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- clean-code
- description
- Apply Robert C. Martin-inspired clean code rules when improving readability, naming, function design, responsibilities, or testable everyday code.
- license
- MIT
Clean Code Skill
Use this skill when a task involves everyday implementation quality, naming, small functions, readable control flow, responsibilities, comments, errors, or tests.
Before making design or code decisions, read and apply clean-code.mini.md. Use clean-code.md only as a deeper reference when the mini rules are not enough for the current code-quality tradeoff.
© ciembor, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files in clean-code of ciembor/agent-rules-books.
- SKILL.md
- clean-code.md
- clean-code.mini.md
- clean-code.nano.md
Open the folder on GitHubat commit 893a88a
Compare with similar skills
Clean Code Rules next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Clean Code Rules this skillciembor/agent-rules-books | 2.9k | — | ~154 | Automated safety check: Pass | MIT | |
| Systematic Code Refactoringluongnv89/claude-howto | 42k | — | ~3k | Automated safety check: Pass | MIT | |
| Dignified Python Standardsdocling-project/docling | 68k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 | |
| Clean Code GuardamElnagdy/guard-skills | 1.3k | 2 repos | ~4.3k | Automated safety check: Pass | MIT | |
| Code Refactoring Workflowluongnv89/claude-howto | 42k | — | ~3.1k | Automated safety check: Pass | MIT | |
| Maintainable Code for iPolloWorkDevin-AXIS/iPolloWork | 6.7k | — | ~2.7k | Automated safety check: Pass | Custom licence |
Similar skills
Dignified Python Standards
docling-project/docling
Applies opinionated production Python conventions chosen by the project's Python version: modern type syntax, pathlib, explicit checks and interface guidance.
Clean Code Guard
amElnagdy/guard-skills
Reviews generated or changed production code against Clean Code, SOLID, DRY, KISS, YAGNI and LLM-specific failure modes before it ships, in any language.
Code Refactoring Workflow
luongnv89/claude-howto
Guides systematic, test-backed refactoring in the style of Martin Fowler, moving through research, planning and small incremental changes with your approval at each phase.
Maintainable Code for iPolloWork
Devin-AXIS/iPolloWork
A code-change gate for the iPolloWork repository: search and reuse first, keep one source of truth, justify every new file or dependency, and audit the change.
Tech Debt Analyzer
ailabs-393/ai-labs-claude-skills
This skill should be used when analyzing technical debt in a codebase, documenting code quality issues, creating technical debt registers, or assessing code maintainability.
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Code Complete Construction Rules
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Data-Intensive Design Rules
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Apply Martin Kleppmann-inspired data-system rules when designing reliability, scalability, consistency, replication, transactions, streams, or schema evolution.
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Related
Categories
Questions about Clean Code Rules
How do I install Clean Code Rules in Claude Code?
Run `npx skills add ciembor/agent-rules-books --skill clean-code -a claude-code`. Or copy the skill folder (clean-code in ciembor/agent-rules-books) into .claude/skills/clean-code in your project. Claude Code loads it when a task matches its description.
How do I install Clean Code Rules in Codex?
Run `npx skills add ciembor/agent-rules-books --skill clean-code -a codex`. Or copy the skill folder (clean-code in ciembor/agent-rules-books) into .agents/skills/clean-code in your project. Codex loads it when a task matches its description.
Can I use Clean Code Rules in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ciembor/agent-rules-books --skill clean-code -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/clean-code, .gemini/skills/clean-code, .github/skills/clean-code and .opencode/skills/clean-code in your project.
What does Clean Code Rules need to run?
SKILL.md names no scripts, command-line tools or credentials: Clean Code Rules is instructions for the agent only.
Does Clean Code Rules access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Clean Code Rules safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Clean Code Rules use?
Clean Code Rules is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Clean Code Rules use?
About 154 tokens (SKILL.md is roughly 616 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Clean Code Rules?
Skills that share tags, products or a category with Clean Code Rules: Systematic Code Refactoring (luongnv89/claude-howto, 42k stars), Dignified Python Standards (docling-project/docling, 68k stars), Clean Code Guard (amElnagdy/guard-skills, 1.3k stars) and Code Refactoring Workflow (luongnv89/claude-howto, 42k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Clean Code Rules?
ciembor (a GitHub user) maintains it in ciembor/agent-rules-books, which has 2,921 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 10, 2026.
Source: ciembor/agent-rules-books on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.