export interface PendingResponsePatchMarker {
    sessionId: string;
    cardId: string;
    state: 'patching' | 'patched';
    createdAt: string;
    patchedAt?: string;
}
export declare function readPendingResponsePatchMarker(sessionId: string): PendingResponsePatchMarker | undefined;
export declare function writePendingResponsePatchMarker(sessionId: string, cardId: string): void;
export declare function markPendingResponsePatchMarkerPatched(sessionId: string): void;
export declare function clearPendingResponsePatchMarker(sessionId: string): void;
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