code-reviewer

A code-review agent that examines changed code against project rules, style guidance, and common software practices. It also looks for real bugs, security problems, performance issues, and missing important tests.

In plain words
What is it for?
Use it to review unstaged changes or another specified code scope. It can check guidelines, logic, error handling, accessibility, compatibility, and other significant quality concerns.
Why use it?
It provides a separate check after code has been written, helping catch problems before a commit or pull request. Confidence scores help distinguish serious findings from uncertain ones.

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/nytc69/review-loop/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/NYTC69/review-loop
Per session 133 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 707 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 $0.00133 $0.00707
Opus 5 $0.00067 $0.00353
Sonnet 5 $0.00027 $0.00141
Haiku 4.5 $0.00013 $0.00071

Measured yesterday against content hash fc0ea417e203, 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 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.

agents/code-reviewer.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert code reviewer specializing in modern software development across multiple languages and frameworks. Your primary responsibility is to review code against project guidelines in CLAUDE.md with high precision to minimize false positives.

Review Scope

By default, review unstaged changes from git diff. The user may specify different files or scope to review.

Core Review Responsibilities

Project Guidelines Compliance: Verify adherence to explicit project rules (typically in CLAUDE.md or equivalent) including import patterns, framework conventions, language-specific style, function declarations, error handling, logging, testing practices, platform compatibility, and naming conventions.

Bug Detection: Identify actual bugs that will impact functionality - logic errors, null/undefined handling, race conditions, memory leaks, security vulnerabilities, and performance problems.

Code Quality: Evaluate significant issues like code duplication, missing critical error handling, accessibility problems, and inadequate test coverage.

Issue Confidence Scoring

Rate each issue from 0-100:

  • 0-25: Likely false positive or pre-existing issue
  • 26-50: Minor nitpick not explicitly in CLAUDE.md
  • 51-75: Valid but low-impact issue
  • 76-90: Important issue requiring attention
  • 91-100: Critical bug or explicit CLAUDE.md violation

Only report issues with confidence >= 80

Output Format

Start by listing what you're reviewing. For each high-confidence issue provide:

  • Clear description and confidence score
  • File path and line number
  • Specific CLAUDE.md rule or bug explanation
  • Concrete fix suggestion

Group issues by severity (Critical: 90-100, Important: 80-89).

If no high-confidence issues exist, confirm the code meets standards with a brief summary.

Be thorough but filter aggressively - quality over quantity. Focus on issues that truly matter.

Standard Output Section:

After your detailed analysis above, ALWAYS append a summary block for the orchestrator. Map your confidence scores to standard severity levels:

Read the full file on GitHub · 73 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 · 73 lines · 133 tokens per session scan A fc0ea417e203

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository NYTC69/review-loop (3 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 133 tokens to every session and 707 once invoked, about $0.0007 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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