# React Modernization

> Upgrade React applications to latest versions, migrate from class components to hooks, and adopt concurrent features. Use when modernizing React codebases, migrating to React Hooks, or upgrading to...

- Skill: `rootcastleco/react-modernization` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add rootcastleco/react-modernization`
- Raw SKILL.md: https://api.skillmd.com/api/skills/rootcastleco/react-modernization/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: rootcastleco (https://skillmd.com/u/rootcastleco)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/rootcastleco/react-modernization

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# React Modernization

Master React version upgrades, class to hooks migration, concurrent features adoption, and codemods for automated transformation.

## Use this skill when

- Upgrading React applications to latest versions
- Migrating class components to functional components with hooks
- Adopting concurrent React features (Suspense, transitions)
- Applying codemods for automated refactoring
- Modernizing state management patterns
- Updating to TypeScript
- Improving performance with React 18+ features

## Do not use this skill when

- The task is unrelated to react modernization
- You need a different domain or tool outside this scope

## Instructions

- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open `resources/implementation-playbook.md`.

## Resources

- `resources/implementation-playbook.md` for detailed patterns and examples.

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> 🏰 **Rei Skills** — Curated by [Rootcastle Engineering & Innovation](https://www.rootcastle.com) | Batuhan Ayrıbaş  
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