export interface MemoryEvent {
    type: string;
    ts: string;
    data: unknown;
}
/**
 * Append-only JSONL memory store. Each event is a line of JSON.
 * Provides a full audit trail of agent actions and LLM interactions.
 */
export declare class MemoryStore {
    readonly memoryPath: string;
    constructor(memoryPath: string);
    append(event: MemoryEvent): void;
    readAll(maxBytes?: number): MemoryEvent[];
    /**
     * Scrub sensitive payloads so API keys never get persisted in memory.
     */
    private sanitize;
    private sensitiveValues;
    private mask;
    /** Approximate token count kept for compat; use ContextManager for precise counts. */
    estimatedTokenCount(): number;
}
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