import type { ConversationMeta } from "../types";
export declare const SIDECAR_VERSION = 1;
export interface Sidecar {
    version: number;
    sourcePath: string;
    sizeBytes: number;
    mtimeMs: number;
    lastIndexedOffset: number;
    lastIndexedLine: number;
    messageCount: number;
    projectPath: string;
    projectName: string;
    branch: string | null;
    firstSentAt: string | null;
    firstSentText: string | null;
    lastSentAt: string | null;
    lastSentText: string | null;
    updatedAt: string;
}
export declare function sidecarPath(jsonlPath: string): string;
export declare function buildSidecar(meta: ConversationMeta, cursor: {
    sizeBytes: number;
    mtimeMs: number;
    offset: number;
    line: number;
}, updatedAt: string): Sidecar;
export declare function writeSidecar(jsonlPath: string, sidecar: Sidecar): void;
export declare function readSidecar(jsonlPath: string): Sidecar | null;
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