frontend-reviewer

frontend-reviewer is an agent for Claude Code from makigjuro/cloudstack-ai-plugins. It costs 37 tokens per session (1,453 once invoked), scanned A, original, MIT.

A code-review agent for React and TypeScript frontend files. It checks accessibility, speed, security, and common React mistakes.

In plain words
What is it for?
Use it to review changed frontend files for missing labels or image descriptions, slow or unsafe code, and React patterns that may cause bugs.
Why use it?
It catches problems in the part of a web application that users see and interact with, without reviewing unrelated backend or infrastructure code.

Agent for Claude Code

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

Part of the react-developer plugin — 6 skills, 1 agent shipped together

Good fit Use it to review changed frontend files for missing labels or image descriptions, slow or unsafe code, and React patterns that may cause bugs.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/makigjuro/cloudstack-ai-plugins/frontend-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/makigjuro/cloudstack-ai-plugins

Made for: Claude Code.

Or install react-developer, the plugin that ships this one along with the rest of its 6 skills, 1 agent.

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 frontend-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/makigjuro/cloudstack-ai-plugins/frontend-reviewer/github.svg)](https://agentmods.dev/agents/makigjuro/cloudstack-ai-plugins/frontend-reviewer)
Your own site
<a href="https://agentmods.dev/agents/makigjuro/cloudstack-ai-plugins/frontend-reviewer"><img src="https://agentmods.dev/badge/agents/makigjuro/cloudstack-ai-plugins/frontend-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 frontend-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/makigjuro/cloudstack-ai-plugins/frontend-reviewer"><img src="https://agentmods.dev/badge/agents/makigjuro/cloudstack-ai-plugins/frontend-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,453 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 $0.00037 $0.01453
Opus 5.5 $0.00015 $0.00581
Sonnet 5.5 $0.00007 $0.00291
Haiku 4.5 $0.00004 $0.00145

Measured yesterday against content hash 83e9ace56923, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

frontend-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.

plugins/react-developer/agents/frontend-reviewer.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Reviewer Agent

Review React + TypeScript frontend code for accessibility, performance, security, and anti-patterns.

When to Use

Launched by /dev-workflow:complete-task when frontend files change (HAS_FRONTEND is true). Runs in parallel with the general reviewer agent in the shared working tree — read-only, no file edits.

Scope

Only review files under the frontend directory (typically web/src/). Ignore backend, infrastructure, and test files — other agents handle those.

Review Process

  1. If cloudstack.json exists, read:
    • frontend.path → the frontend directory (default: web)
    • STATE_SERVER = frontend.stateManagement.server (default: tanstack-query)
    • STATE_CLIENT = frontend.stateManagement.client (default: zustand)
  2. Get the diff: git diff origin/main...HEAD -- <frontend-path>/
  3. Get changed files: git diff origin/main...HEAD --name-only -- <frontend-path>/
  4. Review each changed file against the checklists below

Accessibility Checklist

Interactive Elements

  • All <button> elements have accessible text (visible label or aria-label)
  • All <a> links have descriptive text (not "click here")
  • All <img> tags have alt attributes (empty alt="" is OK for decorative images)
  • Form inputs have associated <label> elements or aria-label
  • Custom interactive components have role, tabIndex, and keyboard handlers

Semantic HTML

  • Page has a single <h1>; headings don't skip levels
  • Lists use <ul>/<ol>/<li>, not styled <div> elements
  • Navigation uses <nav>, main content uses <main>
  • Modals/dialogs use <dialog> or proper role="dialog" with focus trap

Color & Contrast

  • Text is not conveyed by color alone (icons/labels accompany status colors)
  • Interactive states (hover, focus, active) are visually distinct
  • Focus indicators are visible (no outline: none without replacement)

Performance Checklist

React Anti-Patterns

  • No unnecessary re-renders: components receiving stable props
  • No inline object/array creation in JSX props (causes re-render on every cycle)
  • useCallback/useMemo used for expensive computations, not everywhere
  • No state stored in parent when only child needs it (lift state down)
  • No derived state stored in useState — compute during render instead

Read the full file on GitHub · 170 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 Changed · +3 lines 83e9ace56923
  2. 1mo ago First seen · 167 lines · 37 tokens per session scan A dca9d6b91dd8

Subscribe to this mod's changes

frontend-reviewer is an agent published in the GitHub repository makigjuro/cloudstack-ai-plugins (1 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 1,453 once invoked, about $0.0001 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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