Data Layer

The data layer handles all server-state concerns: API calls, caching, mutations, persistence, and offline support.

What's Included

Feature	Description	Page
Resources	Cached API reads with deduplication, invalidation, and pagination	Resources
Mutations	API writes with optimistic rollback and offline queueing	Mutations
API Client	HTTP client with auth refresh, retry, timeout, and upload	API Client
Persistence	localStorage, sessionStorage, IndexedDB, memory adapters	Persistence

Resources vs. Mutations

	Resources	Mutations
Purpose	Read data	Write data
Caching	Yes (staleTime, cacheTime)	No
Deduplication	Yes	No
Optimistic	No	Yes
Offline queue	No	Yes
Invalidation	Via tags	Triggers invalidation

Import

// Resources and mutations are available from the main package
import { createMesh } from "statemesh-core";

// API client
import { createApiClient } from "statemesh-core";