/**
 * Trace Store - Local JSON file-based trace storage.
 * Stores traces in a JSON file for persistence across sessions.
 */
import type { AgentTrace } from './types';
export interface TraceSearchQuery {
    tool?: string;
    dateRange?: [Date, Date];
    tags?: string[];
}
export interface TraceStoreStats {
    total: number;
    byAdapter: Record<string, number>;
    totalCost: number;
}
export declare class TraceStore {
    private dbPath;
    private data;
    constructor(dbPath?: string);
    private load;
    private persist;
    /**
     * Save a trace and return its unique ID.
     */
    save(trace: AgentTrace, opts?: {
        tags?: string[];
        adapter?: string;
        cost?: number;
    }): string;
    /**
     * Get a trace by ID.
     */
    get(id: string): AgentTrace | null;
    /**
     * Search traces by tool, date range, or tags.
     */
    search(query: TraceSearchQuery): AgentTrace[];
    /**
     * Get aggregate statistics.
     */
    stats(): TraceStoreStats;
    /**
     * Delete traces older than a given date. Returns deleted count.
     */
    prune(olderThan: Date): number;
    /**
     * Total number of stored traces.
     */
    count(): number;
    /**
     * Clear all entries.
     */
    clear(): void;
}
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