/**
 * 一轮 dispatch 内的 assistant 正文段缓冲：
 * - 同段修稿（新文延展/包住旧文）→ 覆盖
 * - 流式分块新段 → 追加合并
 * 在 tool 边界或轮次结束冲刷 HTTP。
 */
import type { ReplyDeliverPayload } from "./send-service.js";
export type DeliverFlushKind = "interim" | "final";
export type BufferedDeliverEntry = {
    payload: ReplyDeliverPayload;
    textPart: string;
    rawTextPart: string;
    hasMedia: boolean;
};
export type TurnDeliverBufferStats = {
    writeCount: number;
    /** write 时判定为修稿并覆盖 */
    revisionOverwriteCount: number;
    /** write 时判定为新段并追加 */
    segmentAppendCount: number;
    flushInterimCount: number;
    flushFinalCount: number;
    skippedDuplicateFlushCount: number;
};
export type TakeForFlushResult = {
    status: "empty";
} | {
    status: "skipped_duplicate";
    entry: BufferedDeliverEntry;
} | {
    status: "ready";
    entry: BufferedDeliverEntry;
};
/** deliver 正文/附件是否值得写入 buffer 或立即 HTTP。 */
export declare function isDeliverPayloadSendable(args: {
    textPart: string;
    hasMedia: boolean;
    isThinking?: boolean;
}): boolean;
/**
 * 新文是否像对旧文的「修稿/延展」（可安全覆盖），而非另一完整分块。
 * 无权威 OpenClaw 标记，偏保守：宁可追加重复，不可覆盖丢段。
 */
export declare function isDeliverTextRevision(oldText: string, newText: string): boolean;
/**
 * 段边界 / 轮末 flush 时，判断是否可用 `onPartialReply` 全量快照覆盖 deliver 拼接文本。
 * 仅当快照（归一化后）与缓冲文本相等或为其超集时才覆盖，避免流式竞态下快照落后导致截断丢内容。
 */
export declare function snapshotSupersedesBufferText(snapshot: string, bufferText: string): boolean;
export declare class TurnDeliverBuffer {
    private buffer;
    private lastFlushedComparable;
    private readonly stats;
    hasContent(): boolean;
    getStats(): TurnDeliverBufferStats;
    write(entry: BufferedDeliverEntry): void;
    takeForFlush(kind: DeliverFlushKind): TakeForFlushResult;
    clear(): void;
}
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