/**
 * Git diff numstat collection with a short-TTL cache.
 */
import type { DiffFile } from './diff-classifier-types.js';
export declare const diffCache: Map<string, {
    files: DiffFile[];
    timestamp: number;
}>;
/**
 * Get git diff statistics using SINGLE combined command (optimized)
 * Replaces two separate git commands with one
 */
export declare function getGitDiffNumstat(ref?: string): DiffFile[];
/**
 * Async version of getGitDiffNumstat for non-blocking operation
 */
export declare function getGitDiffNumstatAsync(ref?: string): Promise<DiffFile[]>;
/**
 * Clear the diff cache (call when git state changes)
 */
export declare function clearDiffCache(): void;
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