import { type DrizzleTransaction } from "../../drizzle.js";
/**
 * Revokes descendant memberships when parent access ends and records a targeted documents-area event when an affected joined chat has an attachment.
 * Parent joins deliberately do not enroll the user into child channels; each child membership is explicit.
 */
export declare function chatDescendantMembershipSync(tx: DrizzleTransaction, input: {
    ancestorChatId: string;
    userId: string;
    actorUserId: string;
    sequence: number;
    kind: "joined" | "removed" | "left";
}): Promise<boolean>;
//# sourceMappingURL=chatDescendantMembershipSync.d.ts.map