import { type SessionListRow } from "../../../session-list-model.js";
export type ChatRecord = {
    id: string;
    workspaceId: string;
    title: string;
    updatedAt: number;
    pinned: boolean;
    archived: boolean;
    /** Present when the app holds a full or list row, needed for pin and archive. */
    row: SessionListRow | null;
    /** When `row` was last read from the server (ms), so its status is known to be current. */
    readAt: number;
};
export declare function chatRecordFromRow(row: SessionListRow, readAt?: number): ChatRecord;
/**
 * Changes when a row's status marks could change (working, waiting, needs you,
 * failed, unread, scheduled, creator), so a status-only change re-renders the
 * lists. Raw fields only: the marks themselves are drawn by the lazy lists.
 */
export declare function chatStatusKey(row: SessionListRow | null): string;
/** Remember rows the app has read (sidebar pages, search results, the open chat). */
export declare function rememberChats(subjectId: string, rows: readonly SessionListRow[]): void;
/** The chat was opened: move it to the front of the recent list. */
export declare function recordChatVisit(subjectId: string, row: SessionListRow): void;
/** A chat was deleted or is no longer reachable: forget it. */
export declare function forgetChat(subjectId: string, chatId: string): void;
/** The sidebar reports the chats it shows, in order, so next and previous follow it. */
export declare function setSidebarOrder(subjectId: string, workspaceId: string, order: readonly string[], pinnedOrder: readonly string[]): void;
export type ChatDirectorySnapshot = Readonly<{
    /** Chats in every workspace; each record names its workspace. */
    rows: ReadonlyMap<string, ChatRecord>;
    /** Recently opened chats across workspaces, most recent first. */
    recent: readonly string[];
    /** The given workspace's sidebar order and pinned order. */
    sidebarOrder: readonly string[];
    pinnedOrder: readonly string[];
    version: number;
}>;
export declare function readChatDirectory(subjectId: string, workspaceId: string): ChatDirectorySnapshot;
/** Re-renders when the directory changes; read the snapshot through `readChatDirectory`. */
export declare function useChatDirectoryVersion(subjectId: string): number;