import type { LivingMemoryTranscriptMessage } from '../../contracts/memory';
export interface LivingMemoryTranscriptInput {
    role: LivingMemoryTranscriptMessage['role'];
    speakerKey?: string;
    speakerLabel: string;
    content: string | string[];
    createdAt: unknown;
    stripSpeakerPrefix?: boolean;
}
export type LivingMemoryTranscriptMessageInvalidReason = 'missing-created-at' | 'missing-speaker' | 'empty-content';
export interface LivingMemoryTranscriptMessageInvalidResult {
    message: null;
    reason: LivingMemoryTranscriptMessageInvalidReason;
}
export interface LivingMemoryTranscriptMessageValidResult {
    message: LivingMemoryTranscriptMessage;
    reason: null;
}
export type LivingMemoryTranscriptMessageResult = LivingMemoryTranscriptMessageInvalidResult | LivingMemoryTranscriptMessageValidResult;
/**
 * 解析「昵称说：内容」格式的话前行（含方括号变体），
 * 用于从转写文本中识别并剥离说话者前缀；不匹配时返回 null。
 */
export declare const parseLivingMemorySpeakerLine: (line: string) => {
    speaker: string;
    content: string;
} | null;
export declare const toLivingMemoryDate: (value: unknown) => Date | null;
export declare const createLivingMemoryTranscriptMessageResult: (input: LivingMemoryTranscriptInput) => LivingMemoryTranscriptMessageResult;
export declare const formatLivingMemoryMessageTime: (date: Date) => string;