| name | reviewing-state-management |
| description | Review state management patterns for React 19 best practices. Use when reviewing component state, Context usage, or state architecture. |
| review | true |
| allowed-tools | Read, Grep |
| version | 1.0.0 |
Review: State Management
Checklist
State Immutability
- No direct state mutation
- Using spread operators or immutable update patterns
- Arrays updated with map/filter/concat (not push/splice)
- Objects updated with spread or Object.assign
State Location
- Local state used when appropriate
- Context only for cross-cutting concerns
- No prop drilling through 3+ levels
- Frequently changing state not in Context
useReducer Usage
- Used for complex state logic
- Reducer functions are pure
- Action types are consistent
- State updates follow patterns
Context Patterns
- Split contexts for different concerns
- Using
use()API in React 19 (notuseContext) - Context providers at appropriate level
- No unnecessary re-renders
Anti-Patterns
- ❌ Direct state mutation (
state.push(),state.x = y) - ❌ Context for frequently changing values
- ❌ Excessive prop drilling
- ❌ God components managing too much state
For comprehensive state patterns, see: research/react-19-comprehensive.md.