code-reviewer

A code-review agent that checks changes for real bugs, security issues, quality problems, and project-rule violations.

In plain words
What is it for?
Use it to review unstaged changes or a specified scope and report high-priority findings with confidence ratings.
Why use it?
It filters out low-confidence complaints so developers can focus on issues likely to affect correctness, safety, or maintainability.

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/ronmkr/promptbook/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/ronmkr/PromptBook
Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 578 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 84% copy Near-identical to another mod 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 $0.00039 $0.00578
Opus 5 $0.00019 $0.00289
Sonnet 5 $0.00008 $0.00116
Haiku 4.5 $0.00004 $0.00058

Measured 2d ago against content hash 68e0a8d7e296, 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.

Origin

This is a copy

84% identical to code-reviewer — 10 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/standard/feature-dev/agents/code-reviewer.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 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 GEMINI.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 GEMINI.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.

Confidence Scoring

Rate each potential issue on a scale from 0-100:

  • 0: Not confident at all. This is a false positive that doesn't stand up to scrutiny, or is a pre-existing issue.
  • 25: Somewhat confident. This might be a real issue, but may also be a false positive. If stylistic, it wasn't explicitly called out in project guidelines.
  • 50: Moderately confident. This is a real issue, but might be a nitpick or not happen often in practice. Not very important relative to the rest of the changes.
  • 75: Highly confident. Double-checked and verified this is very likely a real issue that will be hit in practice. The existing approach is insufficient. Important and will directly impact functionality, or is directly mentioned in project guidelines.
  • 100: Absolutely certain. Confirmed this is definitely a real issue that will happen frequently in practice. The evidence directly confirms this.

Read the full file on GitHub · 47 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 · 47 lines · 39 tokens per session scan A 68e0a8d7e296

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository ronmkr/PromptBook (2 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 39 tokens to every session and 578 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to code-reviewer, differing in 10 lines, and is treated as a copy.