export type Brand<T, B extends string> = T & {
    readonly __brand: B;
};
export type TenantId = Brand<string, 'TenantId'>;
export type UserId = Brand<string, 'UserId'>;
export type ConversationId = Brand<string, 'ConversationId'>;
export type SubjectId = Brand<string, 'SubjectId'>;
export type MessageId = Brand<string, 'MessageId'>;
export type ActionId = Brand<string, 'ActionId'>;
export type ProfileId = Brand<string, 'ProfileId'>;
export type ConnectionId = Brand<string, 'ConnectionId'>;
export declare const asTenantId: (s: string) => TenantId;
export declare const asUserId: (s: string) => UserId;
export declare const asConversationId: (s: string) => ConversationId;
export declare const asSubjectId: (s: string) => SubjectId;
export declare const asMessageId: (s: string) => MessageId;
export declare const asActionId: (s: string) => ActionId;
export declare const asProfileId: (s: string) => ProfileId;
export declare const asConnectionId: (s: string) => ConnectionId;
/** Anonymous guests live under this tenant; they bypass cross-tenant scoping but
 *  are still gated by conversation membership. */
export declare const ANONYMOUS_TENANT: TenantId;