import type { Changelog } from './changelog.schema';
export declare class ChangelogHelper {
    static formatForDisplay(releases: Changelog[]): any[];
    static filterByReleaseType(releases: Changelog[], releaseType: 'major' | 'minor' | 'patch'): Changelog[];
    static filterByDateRange(releases: Changelog[], startDate: Date, endDate: Date): Changelog[];
    static filterByScope(releases: Changelog[], scope: string): Changelog[];
    static getStatistics(releases: Changelog[]): {
        total: number;
        major: number;
        minor: number;
        patch: number;
        totalCommits: number;
        commitsByType: Record<string, number>;
        commitsByScope: Record<string, number>;
        averageCommitsPerRelease: number;
    };
    static searchReleases(releases: Changelog[], searchTerm: string): Changelog[];
    static generateMarkdownSummary(releases: Changelog[], maxReleases?: number): string;
    static validateChangelog(data: any): {
        isValid: boolean;
        errors: string[];
    };
}