import type { z } from 'zod';
import type { SerializedRunState } from './runState';
type SerializedState = z.infer<typeof SerializedRunState>;
/**
 * Older writers kept raw compaction output but dropped its RunItem wrapper. Restore the latest
 * marker before resuming because it carries the context required for the next model window.
 */
type LegacyCompactionRehydration = {
    stateJson: SerializedState;
    sessionReconciliation?: {
        generatedInsertionIndex: number;
        previousPersistedItemCount: number;
    };
};
export declare function rehydrateLegacyCompactionRunItems(stateJson: SerializedState): LegacyCompactionRehydration;
export {};