State Management Patterns

When to Use

• Choosing between local, shared, or global state in a React application
• Setting up server state caching with TanStack Query or SWR
• Building forms with validation, arrays, and nested fields
• Syncing application state with URL search parameters
• Designing Python domain models with dataclasses or Pydantic
• Refactoring prop-drilling into a shared store
• Deciding whether to add a state management library or keep things simple

When NOT to Use

• Static sites with no interactive state (pure content pages, docs)
• Server-only rendering with no client-side interactivity
• Simple CRUD backends where database is the only source of truth and there is no in-process state to manage