import type { Channel, Group, WorkspaceUser } from '@doist/twist-sdk';
import type { MutationOptions } from '../../lib/options.js';
export type ChannelMutationOptions = MutationOptions;
export type ExpandedGroup = {
    groupId: number;
    groupName: string;
    userIds: number[];
};
export declare function channelUserIds(channel: Channel): number[];
export declare function fetchUsersByIds(workspaceId: number, userIds: number[]): Promise<Map<number, WorkspaceUser>>;
export declare function logExpansion(expandedFrom: ExpandedGroup[]): void;
export declare function describeExpansion(expandedFrom: ExpandedGroup[]): string | undefined;
export declare function groupsFullyInChannel(groups: Group[], channelUserIdSet: Set<number>): Group[];
/**
 * Shared add/remove mutation flow. Resolves the channel and the requested refs
 * concurrently, diffs against current membership, then either previews
 * (`--dry-run`) or applies the mutation and prints / emits JSON.
 */
export declare function mutateChannelMembership(channelRef: string, refs: string[], action: 'add' | 'remove', options: ChannelMutationOptions): Promise<void>;
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