/**
 * Diagnostic caching utilities
 */
import type { Diagnostic, CacheStats } from '../types/index.js';
/**
 * Diagnostic cache with LRU eviction
 */
export declare class DiagnosticCache {
    private cache;
    private stats;
    constructor(maxSizeMB?: number);
    /**
     * Get cached diagnostics for a file
     */
    get(key: string): Diagnostic[] | null;
    /**
     * Set diagnostics for a file
     */
    set(key: string, diagnostics: Diagnostic[], fileHash?: string): void;
    /**
     * Check if cache has entry
     */
    has(key: string): boolean;
    /**
     * Delete entry from cache
     */
    delete(key: string): void;
    /**
     * Clear all cached diagnostics
     */
    clear(): void;
    /**
     * Invalidate cache entries by pattern
     */
    invalidateByPattern(pattern: RegExp): number;
    /**
     * Get cache statistics
     */
    getStats(): CacheStats;
    /**
     * Reset statistics
     */
    resetStats(): void;
    /**
     * Get all cached file paths
     */
    getCachedFiles(): string[];
    /**
     * Warm cache with initial diagnostics
     */
    warmCache(entries: Map<string, Diagnostic[]>): void;
}
/**
 * Simple file hash for change detection
 */
export declare function hashFile(content: string): string;
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