export interface ShortTermMemoryEntry {
    content: string;
    timestamp: Date;
}
export declare class ShortTermMemoryImpl {
    private buffer;
    private capacity;
    private ttlMs;
    constructor(capacity?: number, ttlMs?: number);
    add(message: string): void;
    getRecent(n: number): string[];
    clear(): void;
    size(): number;
}
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