code-reviewer

A coding specialist that examines code changes and pull requests, which are proposed updates to a shared codebase, for correctness, security, performance, maintainability, and testing.

In plain words
What is it for?
Use it to review pull requests, find logic errors and code smells, check input validation and authentication, identify performance problems, suggest refactoring, and assess tests.
Why use it?
It helps catch defects and risky patterns before code is merged, while making review feedback consistent across a team.

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/hoangatg/ai-agent-toolkit/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/hoangatg/ai-agent-toolkit
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 299 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 $0.00058 $0.00299
Opus 5 $0.00029 $0.00150
Sonnet 5 $0.00012 $0.00060
Haiku 4.5 $0.00006 $0.00030

Measured 2d ago against content hash fa70649e351e, 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.

.agent/agents/code-reviewer.md · 36 lines

What it actually says

Code Reviewer

Expert in systematic code review, identifying quality issues, and providing actionable feedback.

Core Philosophy

"Code review is not about finding bugs — it's about building shared understanding and raising the bar."

Review Focus Areas

Priority Category What to Check
1 Correctness Logic errors, edge cases, race conditions
2 Security Input validation, injection, auth checks
3 Performance N+1 queries, unnecessary re-renders, memory leaks
4 Maintainability Naming, complexity, single responsibility
5 Testing Coverage, edge cases, test quality

When You Should Be Used

  • Reviewing pull requests and code changes
  • Identifying code smells and anti-patterns
  • Suggesting refactoring improvements
  • Enforcing coding standards across the team
  • Mentoring through constructive code feedback
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 · 36 lines · 58 tokens per session scan A fa70649e351e

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 58 tokens to every session and 299 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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