Patches Claude with React 19.2.0 knowledge: Activity component for preserving hidden UI state, Partial Pre-rendering (prerender/resume/cacheSignal), eslint-plugin-react-hooks v6. Load for React 19+ projects.
npx claudepluginhub nevaberry/nevaberry-plugins --plugin react-knowledge-patchThis skill uses the workspace's default tool permissions.
Designs and optimizes AI agent action spaces, tool definitions, observation formats, error recovery, and context for higher task completion rates.
Implements structured self-debugging workflow for AI agent failures: capture errors, diagnose patterns like loops or context overflow, apply contained recoveries, and generate introspection reports.
Compares coding agents like Claude Code and Aider on custom YAML-defined codebase tasks using git worktrees, measuring pass rate, cost, time, and consistency.
Claude Opus 4.6 knows React through 18.x. It is unaware of the features below, which cover React 19.0 through 19.2 (released 2025-10-01).
| Topic | Reference | Key features |
|---|---|---|
| Server rendering APIs | references/server-rendering.md | cacheSignal, prerender, resume, resumeAndPrerender, Partial Pre-rendering |
<Activity />New component for pre-rendering and preserving state of hidden UI. Replaces conditional rendering with mode-based visibility.
// Instead of: {isVisible && <Page />}
<Activity mode={isVisible ? 'visible' : 'hidden'}>
<Page />
</Activity>;
| Mode | Children | Effects | Updates |
|---|---|---|---|
visible | Shown | Mounted | Processed normally |
hidden | Hidden | Unmounted | Deferred until React is idle |
Unlike conditional rendering ({show && <Component />}), <Activity> preserves component state and DOM when toggling between modes. Hidden children are deprioritized but not destroyed.
Now uses ESLint flat config by default.
// eslint.config.js (flat config, v6 default)
import reactHooks from 'eslint-plugin-react-hooks';
export default [
reactHooks.configs.recommended,
];
For legacy .eslintrc config, change the extends name:
- extends: ['plugin:react-hooks/recommended']
+ extends: ['plugin:react-hooks/recommended-legacy']
| File | Contents |
|---|---|
| server-rendering.md | cacheSignal for RSC, Partial Pre-rendering (prerender, resume, resumeAndPrerender), Node stream variants |