clean-code

A code-review and refactoring guide focused on readable names, small functions, clear intent, and avoiding common code smells.

In plain words
What is it for?
Use it during refactoring, implementation review, pull-request review, or when simplifying difficult code.
Why use it?
It helps make existing code easier to understand and maintain after the behavior already works.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/dgouron/review-flow/clean-code
Any agent
npx skills add DGouron/review-flow --skill clean-code
Clone the repo
git clone --depth 1 https://github.com/DGouron/review-flow

Made for: Claude Code, Codex.

Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,097 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00084 $0.03097
Opus 5 $0.00042 $0.01548
Sonnet 5 $0.00017 $0.00619
Haiku 4.5 $0.00008 $0.00310

Measured 2d ago against content hash 55b1b878cb47, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

clean-code scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/clean-code/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Clean Code — Refactor & Challenge

Source: Clean Code (Robert C. Martin, 2008) + Clean Coder (2011).

When to activate

  • REFACTOR phase of the TDD cycle (after GREEN, before the next RED)
  • Implementation self-review (end of feature-implementer workflow)
  • Code review of a PR/MR
  • Explicit request for simplification, readability, "challenge this code"

Scope vs neighboring skills

This skill NEVER duplicates the content of /solid or /anti-overengineering. It complements them.

Concern Skill to use
Responsibility architecture (SRP, OCP, LSP, ISP, DIP) /solid
Should I add a pattern? (YAGNI, KISS, pragmatic architecture) /anti-overengineering
Readability, naming, functions, smells, refactor heuristics /clean-code (here)

Once the pattern is decided (/anti-overengineering) and responsibilities are placed (/solid), /clean-code makes intent self-evident.


The 5 pillars

1. SOLID Design — delegated to /solid

Activate /solid for SRP, OCP, LSP, ISP, DIP. Mentioned here only as a structuring reminder: clean code rests on well-placed responsibilities.

2. Readability first

"The ratio of time spent reading to writing code is well over 10:1. We are constantly reading old code as part of the effort to write new code." — Robert C. Martin

Naming (chap. 2)
  • Intention-revealing: the name should be enough to understand. If you write a comment to explain, the name is broken.
    • OK daysSinceLastReview — KO d, days, elapsed
    • OK filterMergedPullRequests(prs) — KO processPrs(prs, true)
  • No disinformation: accountList must be a List, otherwise accounts.
  • Perceptible distinction: getActiveAccount() vs getActiveAccounts() is a time bomb. Prefer getCurrentAccount() vs getAllActiveAccounts().
  • Searchable: short names only for short scopes (loop index = index in a 3-line loop — not i even though short).
  • No encoding: no Hungarian notation (strName, bIsActive), no I prefix for interfaces.
  • Class names = nouns (ReviewContext, ThreadFetchGateway), method names = verbs (save, fetchByCriteria).
  • Full words only (project rule, coding-standards.md): no ex, i, ctx, gw. Always existing, index, context, gateway.

Read the full file on GitHub · 210 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 210 lines · 84 tokens per session scan A 55b1b878cb47

Subscribe to this mod's changes

clean-code is a skill published in the GitHub repository DGouron/review-flow (42 stars, last pushed 18d ago), licensed MIT. It adds 84 tokens to every session and 3,097 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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