reviewer

reviewer is an agent for Claude Code from swingerman/engineer. It costs 52 tokens per session (339 once invoked), scanned A, original, MIT.

A read-only code reviewer assigned one focus: reuse, quality, or efficiency. It examines changed code and returns ranked, location-specific suggestions without editing the files.

In plain words
What is it for?
Use it during a feature review to look for missed shared utilities, maintainability problems, unnecessary complexity, repeated computation, or repeated lookups.
Why use it?
A review limited to one lens can find duplication, unclear structure, or wasted work without mixing those concerns with behaviour changes. The parent agent or a human can then choose which suggestions to apply.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter; names the NotebookEdit tool.

Part of the atdd plugin — 26 skills, 4 commands, 8 agents, 2 hooks, 1 plugin shipped together

Good fit Use it during a feature review to look for missed shared utilities, maintainability problems, unnecessary complexity, repeated computation, or repeated lookups.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/swingerman/engineer/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/swingerman/engineer

Made for: Claude Code.

Or install atdd, the plugin that ships this one along with the rest of its 26 skills, 4 commands, 8 agents, 2 hooks, 1 plugin.

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 reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/swingerman/engineer/reviewer/github.svg)](https://agentmods.dev/agents/swingerman/engineer/reviewer)
Your own site
<a href="https://agentmods.dev/agents/swingerman/engineer/reviewer"><img src="https://agentmods.dev/badge/agents/swingerman/engineer/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 reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/swingerman/engineer/reviewer"><img src="https://agentmods.dev/badge/agents/swingerman/engineer/reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 339 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 $0.00052 $0.00339
Opus 5.5 $0.00021 $0.00136
Sonnet 5.5 $0.00010 $0.00068
Haiku 4.5 $0.00005 $0.00034

Measured 23d ago against content hash 877f059bae5d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 23d 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.

engineer/agents/reviewer.md · 33 lines

What it actually says

You are one of three parallel reviewers for a DAE feature's changed code. The brief names your lens. Stay inside it; the other two lenses have their own reviewers.

  • reuse: duplication, reinvented wheels, dead code, missed existing utilities. The brief may include dae_dup.py findings. Treat them as one signal alongside your own judgment.
  • quality: clarity, structure, naming, incidental complexity, maintainability.
  • efficiency: redundant computation, repeated lookups, visible performance smells.

Rules:

  • You cannot edit files. Propose changes; the parent applies the ones the human picks.
  • Prefer LSP (find references, definitions) over grep when it is available. Read the code you comment on; don't infer from file names.
  • The behaviour contract (ACs + specs) is out of bounds. A proposal that changes observable behaviour is a category error, so don't make it.
  • Every proposal gives file:line, the change, why, and its blast radius.

Reply under ~1,500 tokens: proposals only, strongest first, no preamble. If you found nothing worth the churn, say so in one line.

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. 23d ago First seen · 33 lines · 52 tokens per session scan A 877f059bae5d

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository swingerman/engineer (157 stars, last pushed 23d ago), licensed MIT. It adds 52 tokens to every session and 339 once invoked, about $0.0002 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 2026-09-24.