code-review

code-review is a skill for Claude Code from selmakcby/claude-agents-skills. It costs 48 tokens per session (743 once invoked), scanned A, original, MIT.

A senior code-review assistant that examines new or changed code and reports issues with severity levels.

In plain words
What is it for?
It is for reviewing diffs for correctness, clarity, performance, edge cases, asynchronous-code problems, and consistency with the project's guidelines.
Why use it?
It can catch bugs, missed error cases, performance problems, unclear structure, and departures from project rules before they reach a commit or pull request.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md.

Good fit It is for reviewing diffs for correctness, clarity, performance, edge cases, asynchronous-code problems, and consistency with the project's guidelines.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/selmakcby/claude-agents-skills/code-review
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 selmakcby/claude-agents-skills --skill code-review
Clone the repo
git clone --depth 1 https://github.com/selmakcby/claude-agents-skills

Made for: Claude Code.

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 code-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/selmakcby/claude-agents-skills/code-review/github.svg)](https://agentmods.dev/skills/selmakcby/claude-agents-skills/code-review)
Your own site
<a href="https://agentmods.dev/skills/selmakcby/claude-agents-skills/code-review"><img src="https://agentmods.dev/badge/skills/selmakcby/claude-agents-skills/code-review/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 code-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/selmakcby/claude-agents-skills/code-review"><img src="https://agentmods.dev/badge/skills/selmakcby/claude-agents-skills/code-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 743 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.00743
Opus 5 $0.00024 $0.00371
Sonnet 5 $0.00010 $0.00149
Haiku 4.5 $0.00005 $0.00074

Measured 10d ago against content hash 47886a937fd4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

code-review 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 10d 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.

my-project-demo/.claude/skills/code-review/SKILL.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review

When to trigger

  • Immediately after new or modified code
  • Before commit / PR
  • When user asks for /code-review

Review approach

Multi-agent review with confidence filtering:

  1. CLAUDE.md compliance — does the code follow project rules?
  2. Bug detector — obvious bugs in the diff
  3. History analyzer — git context to understand intent

Each issue is scored 0–100. Findings below threshold (default 80) are filtered out.

What to check

Clarity

  • Names (variables, functions, files) — do they say what they do?
  • Structure — is it easy to scan?
  • Cognitive load — how much do you hold in your head to understand it?

Correctness

  • Edge cases: null, undefined, empty array, boundary values
  • Error paths: are they handled? Do they fail loudly or silently?
  • Async: await missing? Race conditions? Promise rejections caught?
  • Off-by-one errors in loops / slicing

Performance

  • N+1 queries (especially around ORM usage)
  • O(n²) algorithms on large collections
  • Unnecessary re-renders (React)
  • Missing memoization for expensive computations
  • Synchronous I/O in hot paths

Consistency

  • Matches project style guide (CLAUDE.md, rules/)
  • Immutable patterns used
  • Function size under 50 lines
  • Nesting 4 levels max

Tests

  • Is there a test for the new behavior?
  • Edge cases covered?
  • Mocks realistic (no "happy path only")?
  • Tests independent (no shared state)?

Dead code

  • Unused imports
  • Unreachable branches
  • TODO comments that should be done or deleted
  • Commented-out code

Severity levels

  • CRITICAL — do not commit. Breaks production, security hole, data loss risk.
  • HIGH — fix before next release. Real bug users will hit.
  • MEDIUM — fix when you're in the area. Code smell, minor inefficiency.
  • LOW — nice-to-have. Style preference, optional refactor.

Read the full file on GitHub · 101 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. 10d ago First seen · 101 lines · 48 tokens per session scan A 47886a937fd4

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository selmakcby/claude-agents-skills (124 stars, last pushed 4mo ago), licensed MIT. It adds 48 tokens to every session and 743 once invoked, about $0.0002 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.