code-review

code-review is a skill for Claude Code, Codex from kivo360/OmoiOS. It costs 13 tokens per session (1,114 once invoked), scanned A, original, Apache-2.0.

A structured guide for reviewing code for security, correctness, performance, and maintainability. It covers issues such as injection, access control, input validation, race conditions, inefficient queries, and resource leaks.

In plain words
What is it for?
Use it to review changes for vulnerabilities, logic errors, error handling, concurrency problems, performance issues, and maintainability concerns.
Why use it?
It gives reviewers a consistent way to check both obvious security problems and less visible defects. This reduces the chance that important edge cases or operational risks are missed.

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/kivo360/omoios/code-review
Any agent
npx skills add kivo360/OmoiOS --skill code-review
Clone the repo
git clone --depth 1 https://github.com/kivo360/OmoiOS

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.

agentmods badge for code-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/kivo360/omoios/code-review.svg)](https://agentmods.dev/skills/kivo360/omoios/code-review)
Your own site
<a href="https://agentmods.dev/skills/kivo360/omoios/code-review"><img src="https://agentmods.dev/badge/skills/kivo360/omoios/code-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,114 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 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 $0.00013 $0.01114
Opus 5 $0.00006 $0.00557
Sonnet 5 $0.00003 $0.00223
Haiku 4.5 $0.00001 $0.00111

Measured 4d ago against content hash aa533df55092, 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 scanned grade A with 2 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

fetch(userProvidedUrl); // BAD

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

os.system(f"ls {user_input}") # BAD
backend/omoi_os/sandbox_skills/code-review/SKILL.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review

Perform thorough code reviews using this structured approach.

Review Checklist

1. Security (CRITICAL)

  • Injection vulnerabilities: SQL, command, XSS, template injection
  • Authentication: Proper auth checks, secure session handling
  • Authorization: Access control on all sensitive operations
  • Secrets: No hardcoded credentials, API keys, tokens
  • Input validation: All user input validated and sanitized
  • Output encoding: Proper encoding for context (HTML, URL, JS)

2. Logic & Correctness

  • Requirements met: Code implements what was specified
  • Edge cases: Null/empty/boundary conditions handled
  • Error handling: Exceptions caught and handled appropriately
  • Race conditions: Concurrent access handled correctly
  • State management: State transitions are valid

3. Performance

  • N+1 queries: Database queries in loops
  • Memory leaks: Unclosed resources, retained references
  • Unnecessary computation: Repeated calculations, missing caching
  • Blocking operations: Async operations not blocking main thread
  • Large payloads: Response sizes reasonable

4. Maintainability

  • Single responsibility: Each function/class has one purpose
  • DRY: No duplicated code
  • Naming: Clear, descriptive names for variables/functions
  • Comments: Complex logic explained, not obvious code
  • Type hints: Types annotated (Python/TypeScript)

5. Testing

  • Test coverage: New code has tests
  • Test quality: Tests verify behavior, not implementation
  • Edge case tests: Boundary conditions tested
  • Integration tests: System interactions tested

Review Output Format

## Code Review: {file/component}

### Summary
{1-2 sentence overall assessment}

### 🔴 Critical Issues
{Must fix before merge}

#### Issue 1: {Title}
- **Location**: `file.py:42`
- **Problem**: {Description}
- **Impact**: {Security/correctness impact}
- **Fix**: {Suggested solution}

### 🟡 Suggestions
{Should consider fixing}

#### Suggestion 1: {Title}
- **Location**: `file.py:88`
- **Current**: {What it does now}
- **Suggested**: {Better approach}
- **Reason**: {Why this is better}

### 🟢 Positive Notes
{Good patterns to highlight}

- Good use of {pattern} at `file.py:100`
- Clear error handling in {function}

### Verdict
- [ ] ✅ Approve
- [ ] 🔄 Request Changes
- [ ] 💬 Needs Discussion

Read the full file on GitHub · 155 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. 4d ago First seen · 155 lines · 13 tokens per session scan A aa533df55092

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository kivo360/OmoiOS (75 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 1,114 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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