/**
 * Versioned Recall Envelope 构建与预算裁剪。
 */
export interface EnvelopeRecord {
    role: string;
    occurredAt: string;
    sessionId: string;
    entryId: string;
    contentHash: string;
    text: string;
    score: number;
}
export interface RecallBundle {
    requestId: string;
    prompt: string;
    records: EnvelopeRecord[];
    envelopeText: string;
    estimatedTokens: number;
    trustRuleAppended: boolean;
}
/**
 * 转义正文中的冲突 marker 字符序列。
 */
export declare function escapeEnvelopeMarkers(text: string): string;
/**
 * 按 4 records / 600 tokens 从最低分开始移除，构建 envelope。
 */
export declare function buildRecallBundle(requestId: string, prompt: string, ranked: EnvelopeRecord[]): RecallBundle | null;
/**
 * 渲染 envelope 文本。
 */
export declare function renderEnvelope(requestId: string, records: EnvelopeRecord[]): string;
/**
 * 消息中是否已含冲突/既有 envelope marker。
 */
export declare function messagesContainEnvelopeMarker(messages: unknown[]): boolean;
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