export declare function isEagerWarmupEnabled(): boolean;
export declare function isEngineWarmEnabled(): boolean;
/**
 * Fire-and-forget pre-warm of the search engine origins' connection pools
 * (DNS + TLS + keep-alive). Never blocks startup, never throws. A same-origin
 * search request issued later reuses the warm socket, so the first real query
 * gets the full engine pool instead of a cold-handshake-truncated subset.
 */
export declare function warmEngines(): void;
/** Test-only: returns the in-flight engine-warm promise (or null). */
export declare function _getEngineWarmPendingForTest(): Promise<void> | null;
/**
 * Fire-and-forget pre-warm of embed + rerank providers. No-op when env unset.
 * Errors logged at warn, never thrown.
 */
export declare function maybeEagerWarmup(): void;
/** Test-only: returns the in-flight warmup promise (or null). */
export declare function _getWarmupPendingForTest(): Promise<void> | null;
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