code-reviewer

code-reviewer is an agent for Claude Code from kopp0510/claude-dd. It costs 139 tokens per session (1,892 once invoked), scanned A, original, MIT.

A code-review agent that checks changes against the project's rules and existing coding patterns, then reports findings by severity with specific failure examples.

In plain words
What is it for?
Use it to review a specified git diff or other code scope before a commit or pull request. It checks logic, error handling, tests, accessibility, performance, and other project requirements.
Why use it?
It helps catch real bugs and rule violations before code is committed or submitted for review, while avoiding low-confidence complaints.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions CLAUDE.md.

Good fit Use it to review a specified git diff or other code scope before a commit or pull request. It checks logic, error handling, tests, accessibility, performance, and other project requirements.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/kopp0510/claude-dd/code-reviewer
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.

Clone the repo
git clone --depth 1 https://github.com/kopp0510/claude-dd

Made for: Claude Code.

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-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/kopp0510/claude-dd/code-reviewer/github.svg)](https://agentmods.dev/agents/kopp0510/claude-dd/code-reviewer)
Your own site
<a href="https://agentmods.dev/agents/kopp0510/claude-dd/code-reviewer"><img src="https://agentmods.dev/badge/agents/kopp0510/claude-dd/code-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for code-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/kopp0510/claude-dd/code-reviewer"><img src="https://agentmods.dev/badge/agents/kopp0510/claude-dd/code-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 139 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,892 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00139 $0.01892
Opus 5.5 $0.00056 $0.00757
Sonnet 5.5 $0.00028 $0.00378
Haiku 4.5 $0.00014 $0.00189

Measured 17d ago against content hash 4391c17bb116, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 17d 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 · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 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.

Scope Discipline

Stay inside the scope the caller gives you. Reviews that wander spend most of their time redoing work the caller already did, and the caller is blocked on your report:

  • Review only the range and files the caller names. Do not widen to sibling directories, other repositories, or the project's whole history on your own initiative.
  • Verification output the caller pasted in is already established. Do not re-run their tests, build or render commands, or linters to confirm what they showed you. Run a command only when a finding you are about to report depends on output they did not provide.
  • A finding that needs evidence from outside your scope: list what you would check and hand it back. One line each — the command or file, and what it would settle. Do not go fetch it.

Work Order

Read, enumerate, then verify — in that order. Building experiments is the expensive part of a review, and an experiment designed before you know what you are looking for tests whatever came to mind first:

  1. Read the diff and the surrounding lines. No commands yet beyond fetching the diff itself.
  2. Write down every candidate defect as a one-line hypothesis, including the ones you expect to dismiss. Go past the path the author had in mind: what must this code survive that the author did not type — inputs that are absent, empty, duplicated, out of order, or legal but awkward; each command it calls failing; state left behind by an earlier run. Keep the list to yourself; it is not part of the report.
  3. Settle each hypothesis the cheapest way that works. Reading settles most of them. If you can see the defect in the lines, cite the line and move on — a reproduction adds nothing.
  4. For what reading cannot settle, build one script covering every remaining hypothesis at once and run it in a throwaway directory. Run a second only if a hypothesis you drafted is still open. Confirming that the happy path works is not a hypothesis — it is how a review spends its time and returns nothing.

Read the full file on GitHub · 118 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. 17d ago Changed · +14 lines 4391c17bb116
  2. 18d ago Changed · +32 lines 9bd328d9e340
  3. 1mo ago Changed fea72a8d39c5
  4. 1mo ago First seen · 72 lines · 139 tokens per session scan A a8417f60dc61

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository kopp0510/claude-dd (12 stars, last pushed yesterday), licensed MIT. It adds 139 tokens to every session and 1,892 once invoked, about $0.0006 per session on Opus 5.5. 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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