/**
 * Local JSON storage for ZPL history, watchlist, and reports.
 * Stores in ~/.zpl-engine/ directory.
 */
export interface HistoryEntry {
    id: string;
    timestamp: string;
    tool: string;
    question?: string;
    options?: string[];
    domain?: string;
    results: Record<string, unknown>;
    ain_scores: Record<string, number>;
}
/**
 * Redact secret-shaped strings from any input. Same regex set as
 * addHistory() previously inlined — extracted here in v4.1.0 so the SAME
 * patterns can also be applied to tool error responses (index.ts) and to
 * any future place an engine response body might echo a key back.
 *
 * Patterns:
 *   - ZPL keys (legacy + wizard prefix variants): `zpl_[us]_(?:[a-z]+_)?<20+ hex>`
 *   - Bearer tokens (Authorization header echoes)
 *   - Anthropic / OpenAI sk-* (and sk-ant-* — note hyphens INSIDE the body)
 *   - Stripe sk_live_* / sk_test_*
 *   - Groq gsk_*
 *
 * Returns the input unchanged if it contains no matches. Idempotent.
 */
export declare function sanitizeSecrets(input: string): string;
export declare function getHistory(limit?: number): HistoryEntry[];
export declare function addHistory(entry: Omit<HistoryEntry, "id" | "timestamp">): HistoryEntry;
export declare function clearHistory(): number;
/**
 * Best-effort token estimate for a single history entry.
 * Engine returns `tokens_used` per call — when tools persist that to
 * `results`, we use it directly. When they don't, we guess from tool
 * shape so quota/alert estimates aren't catastrophically wrong.
 *
 * Pre-v3.7.2 this was hardcoded `+= 5` everywhere, which under-counted
 * by 3-100x depending on dimension. Going forward, tools should save
 * `tokens_used` (or `totalTokens` for multi-call tools) in their history
 * results so this helper can return real numbers.
 */
export declare function estimateOpTokens(entry: HistoryEntry): number;
export interface WatchlistItem {
    id: string;
    name: string;
    domain: string;
    input: Record<string, unknown>;
    last_ain?: number;
    last_check?: string;
    added: string;
    notes?: string;
}
export declare function getWatchlist(): WatchlistItem[];
export declare function addToWatchlist(item: Omit<WatchlistItem, "id" | "added">): WatchlistItem;
export declare function removeFromWatchlist(id: string): boolean;
export declare function updateWatchlistItem(id: string, ain: number): void;