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oo-design-smell-detector

oo-design-smell-detector is a skill for Claude Code from bookforge-ai/bookforge-skills. It costs 167 tokens per session (6,112 once invoked), scanned A, original, CC-BY-SA-4.0.

A code review guide for finding common object-oriented design smells and suggesting design patterns to address them. Design smells are signs that code may be difficult to change or maintain.

In plain words
What is it for?
Use it to review a codebase, investigate fragile design, or audit how classes depend on one another and use inheritance.
Why use it?
It helps explain why changes are hard by checking issues such as fixed object creation, operation dependencies, coupling, and deep inheritance.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the design-patterns-gof plugin — 15 skills shipped together

not rated 42repo 6mo ago A scan 167 tokens CC-BY-SA-4.0

Good fit Use it to review a codebase, investigate fragile design, or audit how classes depend on one another and use inheritance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bookforge-ai/bookforge-skills/oo-design-smell-detector
View source ↗ bookforge-ai/bookforge-skills
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.

Any agent
npx skills add bookforge-ai/bookforge-skills --skill oo-design-smell-detector
Clone the repo
git clone --depth 1 https://github.com/bookforge-ai/bookforge-skills

Made for: Claude Code.

Or install design-patterns-gof, the plugin that ships this one along with the rest of its 15 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for oo-design-smell-detector

README.md
[![agentmods](https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector/github.svg)](https://agentmods.dev/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector)
Your own site
<a href="https://agentmods.dev/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for oo-design-smell-detector

Your own site · 80×15
<a href="https://agentmods.dev/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/oo-design-smell-detector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 167 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,112 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00167 $0.06112
Opus 5.5 $0.00067 $0.02445
Sonnet 5.5 $0.00033 $0.01222
Haiku 4.5 $0.00017 $0.00611

Measured 2mo ago against content hash 861f70557e6a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

oo-design-smell-detector 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 2mo 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.

books/design-patterns-gof/skills/oo-design-smell-detector/SKILL.md · 378 lines

The source is not reproduced here

Licensed CC-BY-SA-4.0

The repository is licensed CC-BY-SA-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 378 lines · 167 tokens per session scan A 861f70557e6a

Subscribe to this mod's changes

oo-design-smell-detector is a skill published in the GitHub repository bookforge-ai/bookforge-skills (42 stars, last pushed 6mo ago), licensed CC-BY-SA-4.0. It adds 167 tokens to every session and 6,112 once invoked, about $0.0007 per session on Opus 5.5. 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.

Code reviewanti-patternscouplingdesign-patternsdesign-smellsgof-patternsinheritanceoo-designrefactoring
Related

oo-design-smell-detector compared with skills from other repositories

oo-design-smell-detector next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
oo-design-smell-detectorbookforge-ai/bookforge-skillsSkill426mo agoCC-BY-SA-4.0A167Claude Code
refactoring-workflowpersonamanagmentlayer/pclSkill4411d agoApache-2.0A83Claude Code
design-pattern-reviewsirius-zuo/design-pattern-skillSkill75mo agoMITB34Claude Code, Codex
software-code-refactoringstencila/stencilaSkill9144d agoApache-2.0A102Claude Code
brooks-lintskillmds/skillmdSkill1893d agoMITA26Claude Code
improve-codebase-architectureseaworld008/Commonly-used-high-value-skillsSkill742d agoMITA22Claude Code, Codex
design-patternsj4flmao/agent-skillsSkill383d agoMITA104Claude Code, Codex