/**
 * Leaper Agent – Result Storage
 * Cache tool results, dedup identical calls, TTL-based expiry.
 */
export interface CachedResult {
    key: string;
    result: string;
    tool: string;
    args_hash: string;
    created_at: number;
    expires_at: number;
    size_bytes: number;
}
export interface StorageOptions {
    ttl_ms?: number;
    max_result_bytes?: number;
    persist?: boolean;
}
export interface StorageStats {
    total_entries: number;
    total_bytes: number;
    hit_count: number;
    miss_count: number;
}
export declare function hashArgs(args: Record<string, unknown>): string;
export declare function cacheKey(tool: string, argsHash: string): string;
export declare function generatePreview(result: string, maxChars?: number): string;
export declare function buildPersistedMessage(key: string, filePath: string, preview: string, totalBytes: number): string;
export declare class ResultStorage {
    private cache;
    private hitCount;
    private missCount;
    private opts;
    constructor(opts?: StorageOptions);
    get(tool: string, args: Record<string, unknown>): string | null;
    set(tool: string, args: Record<string, unknown>, result: string): string;
    invalidate(tool: string, args: Record<string, unknown>): boolean;
    invalidateAll(tool?: string): number;
    evictExpired(): number;
    stats(): StorageStats;
    maybePersist(result: string, maxBytes?: number): string;
}
export declare const globalResultStorage: ResultStorage;
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