/**
 * 纯合成 Pi session v3 fixture 构建器（不含真实用户内容）。
 */
export interface SessionHeaderInput {
    id?: string;
    cwd: string;
    parentSession?: string;
    timestamp?: string;
}
export interface MessageEntryInput {
    id?: string;
    parentId: string | null;
    role: "user" | "assistant" | "toolResult" | "custom";
    text?: string;
    thinking?: string;
    toolName?: string;
    customType?: string;
    timestamp?: string;
}
export interface CompactionEntryInput {
    id?: string;
    parentId: string | null;
    summary: string;
    timestamp?: string;
}
export type FixtureEntry = MessageEntryInput | CompactionEntryInput | Record<string, unknown>;
export interface SessionFixtureSpec {
    name: string;
    header: SessionHeaderInput;
    entries: FixtureEntry[];
}
/**
 * 生成 8 位 hex entry ID。
 */
export declare function makeEntryId(seed?: string): string;
/**
 * 构造 v3 session header JSON 对象。
 */
export declare function buildHeader(input: SessionHeaderInput): Record<string, unknown>;
/**
 * 构造 message entry。
 */
export declare function buildMessageEntry(input: MessageEntryInput): Record<string, unknown>;
/**
 * 构造 compaction summary entry。
 */
export declare function buildCompactionEntry(input: CompactionEntryInput): Record<string, unknown>;
/**
 * 将 fixture 规格序列化为 JSONL 文本。
 */
export declare function serializeSessionFixture(spec: SessionFixtureSpec): string;
/**
 * 将一组 fixture 写到目录。
 */
export declare function writeSessionFixtures(dir: string, specs: SessionFixtureSpec[]): string[];
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