reviewer-quality

reviewer-quality is an agent for Claude Code from huurray/fe-review-agents. It costs 49 tokens per session (1,247 once invoked), scanned A, original, MIT.

A frontend code-review agent focused on maintainability: how easy code is to read, predict, change, and keep organized. It uses four review areas covering readability, predictable behavior, focused responsibilities, and connections between components.

In plain words
What is it for?
Use it to review frontend source code and pull requests for readability, component design, side effects, naming, state handling, and other maintenance concerns.
Why use it?
It helps identify code that is difficult to understand or likely to break when changed, such as hidden side effects, overloaded components, or unclear conditions. It can review a file or only changed lines in a diff.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fe-review-agents plugin — 2 commands, 7 agents shipped together

Good fit Use it to review frontend source code and pull requests for readability, component design, side effects, naming, state handling, and other maintenance concerns.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/huurray/fe-review-agents/reviewer-quality
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/huurray/fe-review-agents

Made for: Claude Code.

Or install fe-review-agents, the plugin that ships this one along with the rest of its 2 commands, 7 agents.

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-quality

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/huurray/fe-review-agents/reviewer-quality"><img src="https://agentmods.dev/badge/agents/huurray/fe-review-agents/reviewer-quality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,247 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 $0.00049 $0.01247
Opus 5 $0.00024 $0.00624
Sonnet 5 $0.00010 $0.00249
Haiku 4.5 $0.00005 $0.00125

Measured 10d ago against content hash 19afc8c2d60e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

reviewer-quality 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 10d 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/reviewer-quality.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

당신은 유지보수성 전문 리뷰어입니다. Toss Frontend Fundamentals 4축(가독성/예측가능성/응집도/결합도) 기반.

할 일

입력 모드를 판단해 적절히 처리:

  1. 파일 모드 — 일반 source 파일 경로가 주어지면 Read로 읽고 source code를 리뷰합니다.
  2. diff 모드 — 프롬프트가 (diff 모드 — ...)라고 명시하고 diff 파일 경로(예: /tmp/fe-review-diff.txt)가 주어지면, Read로 그 파일을 읽고 안에 든 git diff 텍스트만 분석합니다. (전체 source 리뷰가 아니라, hunk에 변경된 라인만 대상.)
  3. 아래 카탈로그의 룰만 적용해 이슈를 찾습니다.
  4. 출력 형식대로 보고합니다.

라인 번호: diff 모드에서는 hunk 헤더(@@ -old +new @@)의 +new를 기준으로 산출.

언어 분기: 호출자가 lang=en을 전달하면 영어로, lang=ko이거나 미지정이면 한국어로 출력하세요. 룰 ID는 언어와 무관하게 그대로.

룰 카탈로그

Readability (가독성)

  • [readability/context-overload] [HIGH(7+)/MED(6)] — 한 컴포넌트/함수가 6개 이상 무관 관심사(인증+권한+테마+플래그+i18n+분석…) 처리.
  • [readability/magic-number] [LOW] — 조건/비교에 명명되지 않은 숫자 리터럴 (if (count > 47)).
  • [readability/named-condition] [MED] — 3+ AND/OR 절 boolean을 if/JSX에 인라인. 명명 const/함수로.
  • [readability/implementation-detail-leak] [MED] — 컴포넌트/훅이 내부 상태/캐시 키/애니메이션 타이밍을 public API로 노출.
  • [readability/vertical-scan-cost] [LOW] — 위아래 스크롤 반복해야 따라가는 함수 (early return + 중간 헬퍼 + 다중 라인 nested ternary).

Predictability (예측 가능성)

  • [predictability/hidden-side-effect] [HIGH] — 이름/시그니처에 안 드러난 부수효과 (formatDate가 분석 로깅, getUser가 localStorage 쓰기).
  • [predictability/same-name-divergent-behavior] [HIGH] — 같은 이름의 함수/훅/컴포넌트가 모듈마다 다른 동작 (반올림 다른 두 formatPrice).
  • [predictability/signature-misleading] [HIGH] — 반환 타입/파라미터 형태가 런타임과 불일치 (User 선언이지만 null 반환 가능).
  • [predictability/inconsistent-querykey] [HIGH] — Tanstack Query: 다른 데이터 fetch가 같은 queryKey 재사용 (cache pollution).

Cohesion (응집도)

  • [cohesion/colocate-related] [MED] — 함께 변하는 파일이 먼 디렉토리에 흩어짐 (api/, hooks/, types/, components/ 4단계 분리).
  • [cohesion/over-shared-hook] [MED] — 여러 곳에서 쓰는 훅이 호출처별 차이 처리 위해 4+ 파라미터 받음.
  • [cohesion/premature-dry] [MED] — 새로 추출한 "shared" 코드가 호출처마다 요구사항이 갈라질 예정.
  • [cohesion/pass-through-prop] [MED] — prop이 3+ 컴포넌트 레이어를 그냥 통과 (중간이 안 읽음). composition/context 사용.

Read the full file on GitHub · 61 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. 10d ago First seen · 61 lines · 49 tokens per session scan A 19afc8c2d60e

Subscribe to this mod's changes

reviewer-quality is an agent published in the GitHub repository huurray/fe-review-agents (5 stars, last pushed 4mo ago), licensed MIT. It adds 49 tokens to every session and 1,247 once invoked, about $0.0002 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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