import { type DiagnosticEvent } from "../diagnostics/error-codes.js";
/**
 * Strict Pi session v3 JSONL streaming parser（roadmap §5.1）。
 */
export interface SessionHeader {
    type: "session";
    version: number;
    id: string;
    cwd: string;
    timestamp: string;
    parentSession?: string;
}
export interface ParsedEntryBase {
    type: string;
    id: string;
    parentId: string | null;
    timestamp: string;
    byteOffset: number;
    lineHash: string;
}
export interface TextBlock {
    blockIndex: number;
    text: string;
}
export interface ParsedMessageEntry extends ParsedEntryBase {
    type: "message";
    role: string;
    rawContent: unknown;
    textBlocks: TextBlock[];
}
export type ParsedEntry = ParsedMessageEntry | (ParsedEntryBase & {
    type: string;
});
export type SessionParseStatus = "ok" | "header-invalid" | "legacy-unsupported" | "empty";
export interface ParsedSession {
    status: SessionParseStatus;
    header?: SessionHeader;
    entries: ParsedEntry[];
    messages: ParsedMessageEntry[];
    diagnostics: DiagnosticEvent[];
    /** 完整文件字节长度 */
    byteLength: number;
    /** 末尾完整行 hash（增量游标） */
    trailingLineHash: string | null;
    /** 下一可追加 byte offset */
    nextByteOffset: number;
}
/**
 * 解析完整 session 文本（按行扫描，不把正文写入 diagnostics）。
 */
export declare function parseSessionText(text: string): ParsedSession;
/**
 * 仅提取 user/assistant 的 text blocks。
 */
export declare function extractTextBlocks(role: string, content: unknown): TextBlock[];
/**
 * 行 hash。
 */
export declare function hashLine(line: string): string;
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