import type { ChannelId } from '../types/session.js';
import type { ChannelPolicy } from './types.js';
export type ChannelPolicyChange = 'strip-markdown' | 'strip-emojis' | 'truncate' | 'custom';
export interface ChannelPolicyResult {
    text: string;
    changes: ChannelPolicyChange[];
    beforeLen: number;
    afterLen: number;
}
export declare function resolveChannelPolicy(channelId: ChannelId, policies?: readonly ChannelPolicy[]): ChannelPolicy;
export declare function applyChannelPolicy(text: string, policy: ChannelPolicy): ChannelPolicyResult;