Performance Reviewer

Performance Reviewer is an agent for Claude Code from solrac97gr/marketplace-plugins. It costs 21 tokens per session (5,636 once invoked), scanned A, original, no licence file.

An automated review focused on improving the speed and size of React applications. It examines techniques such as memoization, loading code only when needed and reducing the browser bundle.

In plain words
What is it for?
Use it to review memoization, code splitting and bundle optimization opportunities.
Why use it?
It helps identify React code that does unnecessary work or sends too much code to users.

Agent for Claude Code

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

Part of the react-dev plugin — 7 skills, 8 agents shipped together

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.

agentmods
npx agentmods add agents/solrac97gr/marketplace-plugins/performance-reviewer
Clone the repo
git clone --depth 1 https://github.com/solrac97gr/marketplace-plugins

Made for: Claude Code.

Or install react-dev, the plugin that ships this one along with the rest of its 7 skills, 8 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 Performance Reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/solrac97gr/marketplace-plugins/performance-reviewer.svg)](https://agentmods.dev/agents/solrac97gr/marketplace-plugins/performance-reviewer)
Your own site
<a href="https://agentmods.dev/agents/solrac97gr/marketplace-plugins/performance-reviewer"><img src="https://agentmods.dev/badge/agents/solrac97gr/marketplace-plugins/performance-reviewer.svg" alt="Measured on agentmods" 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 5,636 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.05636
Opus 5 $0.00010 $0.02818
Sonnet 5 $0.00004 $0.01127
Haiku 4.5 $0.00002 $0.00564

Measured 5d ago against content hash 5e8df09cc5de, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

Performance 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 5d 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.

plugins/react-dev/agents/performance-reviewer.md · 903 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 5d ago First seen · 903 lines · 21 tokens per session scan A 5e8df09cc5de

Subscribe to this mod's changes

Performance Reviewer is an agent published in the GitHub repository solrac97gr/marketplace-plugins (2 stars, last pushed 7mo ago), with no licence file. It adds 21 tokens to every session and 5,636 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 2026-08-31.

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