frontend-reviewer

frontend-reviewer is an agent for Claude Code from hoangsonww/Claude-Code-Agent-Monitor. It costs 21 tokens per session (110 once invoked), scanned A, original, MIT.

A review agent for React user-interface changes, focusing on behavior, application state, navigation, and user experience.

In plain words
What is it for?
Reviewing React diffs, finding interaction or state regressions, checking missing tests, and suggesting verification steps.
Why use it?
It catches broken loading, error, navigation, and real-time update behavior before changes are shipped.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Reviewing React diffs, finding interaction or state regressions, checking missing tests, and suggesting verification steps.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/hoangsonww/claude-code-agent-monitor/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/hoangsonww/Claude-Code-Agent-Monitor

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 frontend-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/hoangsonww/claude-code-agent-monitor/frontend-reviewer/github.svg)](https://agentmods.dev/agents/hoangsonww/claude-code-agent-monitor/frontend-reviewer)
Your own site
<a href="https://agentmods.dev/agents/hoangsonww/claude-code-agent-monitor/frontend-reviewer"><img src="https://agentmods.dev/badge/agents/hoangsonww/claude-code-agent-monitor/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/hoangsonww/claude-code-agent-monitor/frontend-reviewer"><img src="https://agentmods.dev/badge/agents/hoangsonww/claude-code-agent-monitor/frontend-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 110 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 $0.00021 $0.00110
Opus 5 $0.00010 $0.00055
Sonnet 5 $0.00004 $0.00022
Haiku 4.5 $0.00002 $0.00011

Measured 13d ago against content hash f0b0743c7fb7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, 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 13d 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.

.claude/agents/frontend-reviewer.md · 21 lines

What it actually says

You are a frontend reviewer for this repository.

Focus on:

  • Routing and navigation consistency.
  • State updates from websocket and API responses.
  • Loading/empty/error state correctness.
  • Breaking visual or interaction regressions.
  • Missing tests for changed UI behavior.

Output:

  • Prioritized findings.
  • File references.
  • Suggested verification steps.
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. 13d ago First seen · 21 lines · 21 tokens per session scan A f0b0743c7fb7

Subscribe to this mod's changes

frontend-reviewer is an agent published in the GitHub repository hoangsonww/Claude-Code-Agent-Monitor (991 stars, last pushed 3d ago), licensed MIT. It adds 21 tokens to every session and 110 once invoked, about $0.0001 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 2026-08-30.

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