Provides a stable hash function for serializing complex keys (objects, arrays, circular references) deterministically. This is a pure, self-contained utility that can be extracted and reused in any JavaScript project requiring consistent hashing of data structures.

Implements the core cache abstraction with global state, event listeners, and tag-based revalidation. The cache provider pattern allows swapping storage backends and is designed for concurrent access. While it depends on internal types, the cache logic itself is isolated and demonstrates a clean publish-subscribe design for cache invalidation.

Handles global and scoped cache mutations, including optimistic updates and rollback. It supports both synchronous and asynchronous updater functions and integrates with the cache's event system. The mutation logic is decoupled from React and can be used independently for cache manipulation.

Provides a preload mechanism that fetches data before component mount, deduplicates requests, and integrates with Suspense. It uses a promise cache to avoid redundant fetches and can be called outside of React components. This pattern is reusable for any prefetching scenario in React applications.

Implements a ref-counted subscription mechanism that allows multiple hooks to share a single underlying subscription to an external data source. It manages cleanup when all subscribers unsubscribe. This pattern is reusable for any resource that needs to be shared across components with automatic lifecycle management.