/**
 * BackupRetentionPolicy Value Object
 * Defines how many backups to keep and for how long
 */
export interface BackupRetentionPolicyData {
    maxCount?: number;
    maxAgeDays?: number;
}
export declare class BackupRetentionPolicy {
    private readonly _maxCount;
    private readonly _maxAgeDays;
    private constructor();
    get maxCount(): number | undefined;
    get maxAgeDays(): number | undefined;
    /**
     * Create a BackupRetentionPolicy with validation
     */
    static create(data: BackupRetentionPolicyData): BackupRetentionPolicy;
    /**
     * Create default retention policy: 10 backups, 30 days
     */
    static default(): BackupRetentionPolicy;
    /**
     * Determine if pruning is needed based on current backup state
     */
    shouldPrune(backupCount: number, oldestBackupDate: Date): boolean;
    toJSON(): BackupRetentionPolicyData;
    equals(other: BackupRetentionPolicy): boolean;
}
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