code-review-and-quality

A code-review guide for checking changes before they are merged into the main codebase. It examines correctness, readability, architecture, security, and performance.

In plain words
What is it for?
Use it to review code written by a person or coding agent and decide whether it is ready to merge.
Why use it?
It helps catch bugs, confusing code, unsafe behavior, and unnecessary complexity before a change becomes part of the shared project.

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/oleg494/coding-kit/code-review-and-quality
Any agent
npx skills add oleg494/coding-kit --skill code-review-and-quality
Clone the repo
git clone --depth 1 https://github.com/oleg494/coding-kit

Made for: Claude Code, Codex.

Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 715 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 $0.00051 $0.00715
Opus 5 $0.00026 $0.00358
Sonnet 5 $0.00010 $0.00143
Haiku 4.5 $0.00005 $0.00072

Measured yesterday against content hash ba0ed696669e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-review-and-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 yesterday.

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.

skills/code-review-and-quality/SKILL.md · 81 lines

How it starts

The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review and Quality

Overview

Multi-dimensional code review with quality gates. Five axes: correctness, readability, architecture, security, and performance.

The approval standard: Approve a change when it definitely improves overall code health, even if it isn't perfect. Perfect code doesn't exist. Don't block a change because it isn't exactly how you would have written it.

The Five-Axis Review

1. Correctness

  • Does it match the spec or task requirements?
  • Are edge cases handled (null, empty, boundary values)?
  • Are error paths handled (not just the happy path)?
  • Does it pass all tests? Are the tests actually testing the right things?

2. Readability & Simplicity

  • Are names descriptive and consistent with project conventions?
  • Is the control flow straightforward?
  • Could this be done in fewer lines? (1000 lines where 100 suffice is a failure)
  • Are abstractions earning their complexity? (Don't generalize until the third use case)
  • Are there dead code artifacts: no-op variables, backwards-compat shims, or // removed comments?

3. Architecture

  • Does it follow existing patterns or introduce a new one? If new, is it justified?
  • Does it maintain clean module boundaries?
  • Is there code duplication that should be shared?
  • Are dependencies flowing in the right direction (no circular dependencies)?
  • Does this refactor reduce complexity or just relocate it?

4. Security

  • Is user input validated and sanitized?
  • Are secrets kept out of code, logs, and version control?
  • Is authentication/authorization checked where needed?
  • Are SQL queries parameterized?
  • Are outputs encoded to prevent XSS?

5. Performance

  • Any N+1 query patterns?
  • Any unbounded loops or unconstrained data fetching?
  • Any synchronous operations that should be async?
  • Any missing pagination on list endpoints?

Change Sizing

~100 lines changed   → Good. Reviewable in one sitting.
~300 lines changed   → Acceptable if it's a single logical change.
~1000 lines changed  → Too large. Split it.

Read the full file on GitHub · 81 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. yesterday First seen · 81 lines · 51 tokens per session scan A ba0ed696669e

Subscribe to this mod's changes

code-review-and-quality is a skill published in the GitHub repository oleg494/coding-kit (1 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 715 once invoked, about $0.0003 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 2026-08-31.

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