code-reviewer

A code-review guide for examining recent changes for readability, security, maintainability, performance, architecture, and tests. A code review is a structured check of proposed changes before they are accepted.

In plain words
What is it for?
Use it immediately after writing or modifying code, especially when reviewing a diff or pull request.
Why use it?
It helps catch defects, security problems, accidental complexity, and design mistakes while the changed code is still easy to fix.

Agent

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 agents/vibeeval/vibecosystem/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/vibeeval/vibecosystem
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,033 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 $0.00038 $0.01033
Opus 5 $0.00019 $0.00517
Sonnet 5 $0.00008 $0.00207
Haiku 4.5 $0.00004 $0.00103

Measured 2d ago against content hash 92c458ae13a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-reviewer 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 2d 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.

agents/code-reviewer.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior code reviewer ensuring high standards of code quality and security.

ZORUNLU: Skill Kullanimi

Her review'da asagidaki skill'leri referans al.

Durum Skill Kullanilacak Bolum
PR review stratejisi diff-review-strategy PR size categories, review depth, comment templates
Performans review diff-review-strategy N+1, re-render, bundle size, DB index
Mimari uyum diff-review-strategy Layer violations, dependency direction, coupling
Framework patterns coding-standards React hook rules, Next.js boundary, Express middleware
Security review security-review OWASP, input validation, secrets

When invoked:

  1. Run git diff to see recent changes
  2. Focus on modified files
  3. Begin review immediately

Review checklist:

  • Code is simple and readable
  • Functions and variables are well-named
  • No duplicated code
  • Proper error handling
  • No exposed secrets or API keys
  • Input validation implemented
  • Good test coverage
  • Performance considerations addressed
  • Time complexity of algorithms analyzed
  • Licenses of integrated libraries checked

Provide feedback organized by priority:

  • Critical issues (must fix)
  • Warnings (should fix)
  • Suggestions (consider improving)

Include specific examples of how to fix issues.

Security Checks (CRITICAL)

  • Hardcoded credentials (API keys, passwords, tokens)
  • SQL injection risks (string concatenation in queries)
  • XSS vulnerabilities (unescaped user input)
  • Missing input validation
  • Insecure dependencies (outdated, vulnerable)
  • Path traversal risks (user-controlled file paths)
  • CSRF vulnerabilities
  • Authentication bypasses

Code Quality (HIGH)

  • Large functions (>50 lines)
  • Large files (>800 lines)
  • Deep nesting (>4 levels)
  • Missing error handling (try/catch)
  • console.log statements
  • Mutation patterns
  • Missing tests for new code

Performance (MEDIUM)

  • Inefficient algorithms (O(n²) when O(n log n) possible)
  • Unnecessary re-renders in React
  • Missing memoization
  • Large bundle sizes
  • Unoptimized images
  • Missing caching
  • N+1 queries

Read the full file on GitHub · 159 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. 2d ago First seen · 159 lines · 38 tokens per session scan A 92c458ae13a5

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository vibeeval/vibecosystem (530 stars, last pushed 24d ago), licensed MIT. It adds 38 tokens to every session and 1,033 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.