Menu

Individual skill

react

0upvotes

React 19/19.2 modern patterns for concurrent rendering, Server Components, actions, ref-as-prop, document metadata, resource hints, hooks, and memoization — plus a category-major review/refactor algorithm with codebase-level (remove/dedup/reuse) findings. This skill should be used when writing React 19 components, using concurrent features, migrating from React 18, optimizing re-renders, OR auditing/refactoring a React codebase (single file or whole repo). This skill does NOT cover Next.js-specific features like App Router, next.config.js, or Next.js caching (use nextjs-16-app-router skill). For client-side form validation with React Hook Form, use react-hook-form skill.

skills/.curated/react/SKILL.md

Read pinned source

Source commit cf93c57cac89d6fc3e4194686000411567f5caf3

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
No
Repository scan complete
No
Skill scan complete
Yes
Observed behavior
Not checked yet
Last checked
Nov 5, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
223
Repository last updated
Aug 15, 2026
License
MIT

Observed agent integration: codex

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt

# React 19 Best Practices

Comprehensive React 19/19.2 best-practices guide for AI agents. Contains **49 rules across 9 categories**, prioritized by impact from critical (concurrent rendering, server components) through to cross-cutting codebase hygiene (dedup, dead code, boundary coherence). Reflects React 19 headline changes: `ref` as a regular prop (forwardRef deprecated), native document metadata, resource preload APIs, `useActionState`, `useOptimistic`, `use()` hook, and `<Context>` as provider.

Rule files describe **pattern shapes** (not API names) and open with a **"Shapes to recognize"** section listing 2–4 syntactic disguises the same break can wear. **Selected high-value rules** (those whose disguises are most common in real codebases — form actions, ref-as-prop, derived state, context, the `use()` hook, `useCallback`/`memo` pairing) include an extra concrete **"In disguise"** incorrect/correct example pair to teach pattern detection beyond the grep-friendly cases.

## When to Apply

- Writing new React components or refactoring existing ones
- **Auditing or modernizing a directory, PR, or whole repository** (see [`references/_review-algorithm.md`](references/_review-algorithm.md) for the required procedure)
- Migrating from React 18 to React 19 (forwardRef → ref-as-prop, `<Context.Provider>` → `<Context>`, `useFormState` → `useActionState`)
- Optimizing re-render performance or bundle size
- Using concurrent features (useTransition, useDeferredValue, Activity)
- Setting up Server Components or server/client boundaries
Back to top