What is code-quality?

A set of rules for writing and reviewing readable, maintainable code. It covers naming, function size, error handling, documentation, and program structure.

Use it when creating or reviewing code to apply a project style guide, validate external calls, document public interfaces, reduce nesting, and limit complexity.

It reduces confusing code, hidden failures, repeated logic, and difficult-to-maintain designs.

code-quality — Skill for Claude Code and Codex by AgriciDaniel

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 AgriciDaniel/claude-code-essentials-vs-code --skill code-quality

Clone the repo

git clone --depth 1 https://github.com/AgriciDaniel/claude-code-essentials-vs-code

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/agricidaniel/claude-code-essentials-vs-code/code-quality/github.svg)](https://agentmods.dev/skills/agricidaniel/claude-code-essentials-vs-code/code-quality)

Your own site

<a href="https://agentmods.dev/skills/agricidaniel/claude-code-essentials-vs-code/code-quality"><img src="https://agentmods.dev/badge/skills/agricidaniel/claude-code-essentials-vs-code/code-quality/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/agricidaniel/claude-code-essentials-vs-code/code-quality"><img src="https://agentmods.dev/badge/skills/agricidaniel/claude-code-essentials-vs-code/code-quality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 8 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 121 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00008	$0.00121
Opus 5.5	$0.00003	$0.00048
Sonnet 5.5	$0.00002	$0.00024
Haiku 4.5	$0.00001	$0.00012

Measured 2mo ago against content hash 5ff273c867ea, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-quality 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.

templates/skills/code-quality/SKILL.md · 17 lines

What it actually says

When writing or reviewing code:

Follow project style guide (check CLAUDE.md first)
Use meaningful variable names (no single letters except loops)
Keep functions under 50 lines
Add error handling for all external calls
Write self-documenting code
Avoid magic numbers (use named constants)
Use early returns to reduce nesting
Add JSDoc/docstrings for public APIs
Prefer composition over inheritance
Keep cyclomatic complexity low

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.

2mo ago First seen · 17 lines · 8 tokens per session scan A 5ff273c867ea

Subscribe to this mod's changes

code-quality is a skill published in the GitHub repository AgriciDaniel/claude-code-essentials-vs-code (66 stars, last pushed 2mo ago), licensed MIT. It adds 8 tokens to every session and 121 once invoked, about $0.0000 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.

Claude Code Code review ai claude-code-skill developer-tools open-source

code-quality next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
code-qualityAgriciDaniel/claude-code-essentials-vs-code	Skill	66	2mo ago	MIT	A	8	Claude Code, Codex
cn-checkcontinuedev/continue	Skill	36k	4d ago	Apache-2.0	A	49	Claude Code, Codex
wiki-ingestAgriciDaniel/claude-obsidian	Skill	16k	14d ago	MIT	A	88	Claude Code
autoresearchAgriciDaniel/claude-obsidian	Skill	16k	14d ago	MIT	A	80	Claude Code
obsidian-basesAgriciDaniel/claude-obsidian	Skill	16k	14d ago	MIT	A	75	Claude Code
wiki-retrieveAgriciDaniel/claude-obsidian	Skill	16k	14d ago	MIT	A	81	Claude Code
ads-metaAgriciDaniel/claude-ads	Skill	11k	8d ago	MIT	A	78	Claude Code