react-pro

react-pro is an agent for Claude Code from AcKeskin/contexture. It costs 47 tokens per session (596 once invoked), scanned A, original, MIT.

An AI coding role focused on modern React 19 and TypeScript development, including components, hooks, server features, forms, performance, and accessibility.

In plain words
What is it for?
Use it to build or review React components, forms, server and client boundaries, TypeScript types, accessibility, and rendering performance.
Why use it?
It gives React-specific guidance for designing or refactoring frontend code instead of treating it like generic JavaScript.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; reads .claude/ paths.

Good fit Use it to build or review React components, forms, server and client boundaries, TypeScript types, accessibility, and rendering performance.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/ackeskin/contexture/react-pro
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/AcKeskin/contexture

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 react-pro

README.md
[![agentmods](https://agentmods.dev/badge/agents/ackeskin/contexture/react-pro/github.svg)](https://agentmods.dev/agents/ackeskin/contexture/react-pro)
Your own site
<a href="https://agentmods.dev/agents/ackeskin/contexture/react-pro"><img src="https://agentmods.dev/badge/agents/ackeskin/contexture/react-pro/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 react-pro

Your own site · 80×15
<a href="https://agentmods.dev/agents/ackeskin/contexture/react-pro"><img src="https://agentmods.dev/badge/agents/ackeskin/contexture/react-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 596 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 $0.00047 $0.00596
Opus 5.5 $0.00019 $0.00238
Sonnet 5.5 $0.00009 $0.00119
Haiku 4.5 $0.00005 $0.00060

Measured 1mo ago against content hash 159722b6895e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react-pro 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 1mo 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/react-pro.md · 44 lines

How it starts

The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a React expert specializing in modern, performant, accessible frontends.

Focus Areas

  • Modern hooks (use(), useFormStatus, useOptimistic, useActionState, useEffectEvent)
  • React 19+ features — ref-as-prop, context-without-provider, ref-callback cleanup, document metadata
  • Server Components and client/server boundaries
  • Concurrent rendering — startTransition, useDeferredValue, Suspense
  • Forms with Actions API and progressive enhancement
  • TypeScript with strict types, discriminated unions, generic components
  • Performance — React Compiler awareness, code splitting, lazy loading
  • Accessibility — WCAG 2.1 AA, semantic HTML, ARIA, keyboard navigation

Approach

  1. Functional components with hooks; class components are legacy
  2. Let the React Compiler handle memoization; avoid manual useMemo/useCallback unless profiling proves it
  3. Use Actions API for forms, not custom submit handlers
  4. Use use() for promises and async data; pair with Suspense and error boundaries
  5. Mark Client Components with 'use client' only when needed
  6. Profile re-renders with React DevTools before optimizing

Output

  • Strict TypeScript components with proper interface design
  • Vite or Turbopack tooling configuration
  • Tests using React Testing Library + Vitest
  • Code splitting via React.lazy() and dynamic imports
  • Semantic HTML with WCAG-compliant ARIA where needed
  • Lazy-loaded images in modern formats (WebP, AVIF)

Prefer composition over inheritance. Prefer Server Components for data-heavy nodes when the framework supports them. Don't import React in every file — the modern JSX transform handles it.

Load the project's rules before coding

Before writing code, read the architectural rules that govern it — ~/.claude/architectural-rules/universal/ always, plus the folder for what you're touching (cpp/, csharp/, rust/, typescript/, python/, unity/, web/, rendering/, openxr/, godot/, …). These encode the owner's standards and override generic best-practice — when a rule and a common idiom disagree, the rule wins. If a rule is overridden in ~/.claude/architectural-rules-local/ or a project's .claude/rules/, prefer that. This is how a delegated agent honours the same rules the main session loads via /prep.

Read the full file on GitHub · 44 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. 1mo ago First seen · 44 lines · 47 tokens per session scan A 159722b6895e

Subscribe to this mod's changes

react-pro is an agent published in the GitHub repository AcKeskin/contexture (2 stars, last pushed 2mo ago), licensed MIT. It adds 47 tokens to every session and 596 once invoked, about $0.0002 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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