/**
 * Shared QueryClient factory for agent-native apps.
 *
 * Exports a single `createAgentNativeQueryClient(overrides?)` so every
 * template root uses the same house defaults rather than a bare
 * `new QueryClient()` (which ships with staleTime=0 and
 * refetchOnWindowFocus=true, causing unnecessary network requests because the
 * useDbSync layer already pushes real-time invalidations on actual changes).
 *
 * House defaults:
 * - staleTime 30s  — data is considered fresh for 30 s; useDbSync invalidates
 *   on real changes so this only affects the window between sync events.
 * - retry          — never retry 401/403; allow one retry for transient errors.
 * - refetchOnWindowFocus false — useDbSync already runs its own focus poll
 *   (use-db-sync.ts) so unconditional refetch on focus would double-fetch.
 *
 * Callers may pass deep overrides for intentional deviations (e.g. a template
 * that uses a domain-specific staleTime for a particular query category).
 */
import { QueryClient, type QueryClientConfig } from "@tanstack/react-query";
/**
 * Creates a QueryClient pre-configured with agent-native house defaults.
 *
 * Pass `overrides` for intentional template-specific deviations — only what
 * actually differs from the house defaults should be specified.
 */
export declare function createAgentNativeQueryClient(overrides?: QueryClientConfig): QueryClient;
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