react18-commander

react18-commander is an agent for Claude Code from jiamaozheng/awesome-claude-code. It costs 101 tokens per session (2,218 once invoked), scanned A, original, no licence file.

A migration coordinator for moving React 16 or 17 applications to React 18.3.1, especially applications built with many class components.

In plain words
What is it for?
It coordinates the audit, package upgrades, class-component changes, automatic-batching fixes, and test verification, with progress saved for interrupted work.
Why use it?
Large React upgrades involve related code, dependency, state-update, and test changes that need to happen in a controlled order.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; Copilot chat-mode frontmatter (tools: vscode/*).

Good fit It coordinates the audit, package upgrades, class-component changes, automatic-batching fixes, and test verification, with progress saved for interrupted work.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/jiamaozheng/awesome-claude-code/react18-commander
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/jiamaozheng/awesome-claude-code

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 react18-commander

README.md
[![agentmods](https://agentmods.dev/badge/agents/jiamaozheng/awesome-claude-code/react18-commander.svg)](https://agentmods.dev/agents/jiamaozheng/awesome-claude-code/react18-commander)
Your own site
<a href="https://agentmods.dev/agents/jiamaozheng/awesome-claude-code/react18-commander"><img src="https://agentmods.dev/badge/agents/jiamaozheng/awesome-claude-code/react18-commander.svg" alt="Measured on agentmods" height="20"></a>
Per session 101 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,218 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00101 $0.02218
Opus 5 $0.00051 $0.01109
Sonnet 5 $0.00020 $0.00444
Haiku 4.5 $0.00010 $0.00222

Measured 4d ago against content hash e1e20f9f4661, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

react18-commander scanned grade A with 1 finding 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 4d 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.

Strips warnings and disclaimerslowAnti-refusal

Omitting safety caveats hides risk from the user and is a common jailbreak preamble.

- **Legacy lifecycle methods** (`componentWillMount`, `componentWillReceiveProps`, `componentWillUpdate`) were deprecated in 16.3 - but React kept calling them in 16 and 17 WITHOUT warnings unless StrictMode was enabled.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

agents/react18-commander.md · 231 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. 4d ago First seen · 231 lines · 101 tokens per session scan A e1e20f9f4661

Subscribe to this mod's changes

react18-commander is an agent published in the GitHub repository jiamaozheng/awesome-claude-code (1 stars, last pushed today), with no licence file. It adds 101 tokens to every session and 2,218 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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