/**
 * Diff HTML generator module
 */
import type { DiffGenerator, BuildArtifact, RuntimeContext } from '../types/index.js';
export declare class HtmlDiffGenerator implements DiffGenerator {
    private readonly templatePath;
    private readonly storageProvider;
    constructor(templatePath?: string);
    /**
     * Generate diff HTML page
     */
    generate(base: string, head: string, context: RuntimeContext): Promise<BuildArtifact>;
    /**
     * Check if there are changes between base and head, or uncommitted changes in working directory
     */
    private hasChanges;
    /**
     * Get git diff content including both committed changes and working directory changes
     */
    private getDiffContent;
    /**
     * Get commit information
     */
    private getCommitInfo;
    /**
     * Generate HTML content using template and diff2html
     */
    private generateHtml;
    /**
     * Count number of files in diff
     */
    private getFileCount;
    /**
     * Generate diff using external diff2html-cli (fallback method)
     */
    generateWithCli(base: string, head: string, context: RuntimeContext): Promise<BuildArtifact>;
}
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