react-19
✓React 19 patterns and breaking changes vs React 18. Trigger: When writing React 19 components/hooks in .tsx (ref as prop, new hooks, Actions, deprecations). If using Next.js App Router/Server Actions, also use nextjs-15.
Installation
SKILL.md
This skill focuses on what changed in React 19. Not a complete React reference.
If upgrading from pre-18 versions, these changes accumulated and are now mandatory:
| createRoot / hydrateRoot | React 18 | Required (ReactDOM.render removed) | | Concurrent rendering | React 18 | Foundation for all R19 features | | Automatic batching | React 18 | Default behavior | | useId, useSyncExternalStore | React 18 | Stable, commonly used | | Hooks (no classes for new code) | React 16.8 | Only path for new features |
React 19 patterns and breaking changes vs React 18. Trigger: When writing React 19 components/hooks in .tsx (ref as prop, new hooks, Actions, deprecations). If using Next.js App Router/Server Actions, also use nextjs-15. Source: noklip-io/agent-skills.
Facts (cite-ready)
Stable fields and commands for AI/search citations.
- Install command
npx skills add https://github.com/noklip-io/agent-skills --skill react-19- Source
- noklip-io/agent-skills
- Category
- </>Dev Tools
- Verified
- ✓
- First Seen
- 2026-02-01
- Updated
- 2026-02-18
Quick answers
What is react-19?
React 19 patterns and breaking changes vs React 18. Trigger: When writing React 19 components/hooks in .tsx (ref as prop, new hooks, Actions, deprecations). If using Next.js App Router/Server Actions, also use nextjs-15. Source: noklip-io/agent-skills.
How do I install react-19?
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/noklip-io/agent-skills --skill react-19 Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code or Cursor
Where is the source repository?
https://github.com/noklip-io/agent-skills
Details
- Category
- </>Dev Tools
- Source
- skills.sh
- First Seen
- 2026-02-01