import { type MutationHint } from "./types.js";
import { type DrizzleExecutor } from "../drizzle.js";
/**
 * Moves one chat directly after another in the actor's personal sidebar order by minting a single fractional index in userChatPreferences.
 *
 * A move is stated as a row and the row it now follows rather than as a restated
 * arrangement, so two devices dragging different chats both land instead of one
 * overwriting the other. The first move materializes the order: every chat the
 * actor can currently see is stamped with a key in its existing display order,
 * because a fractional index is only meaningful against neighbours that have one.
 * That normalization is deterministic from the same list, so a client can mint
 * the identical keys optimistically and the dropped row does not jump when the
 * reconcile answers. The whole rewrite shares one sync sequence so no device
 * assembles a half-old sidebar.
 */
export declare function chatReorder(executor: DrizzleExecutor, actorUserId: string, chatId: string, afterChatId: string | undefined): Promise<{
    hint: MutationHint;
}>;
//# sourceMappingURL=chatReorder.d.ts.map