import type { BlockInterface, MessageInterface } from './types.js';
/**
 * Abstract base for all Slack message types.
 */
declare abstract class AbstractMessage implements MessageInterface {
    abstract readonly maxBlocks: number;
    channel?: string;
    text?: string;
    threadTs?: string;
    private blocks;
    addBlock(block: BlockInterface): void;
    getBlocks(): BlockInterface[];
    toJSON(): Record<string, unknown>;
}
/**
 * Standard Slack message (max 50 blocks).
 */
export declare class Message extends AbstractMessage {
    readonly maxBlocks = 50;
}
/**
 * Modal view message (max 100 blocks).
 */
export declare class ModalMessage extends AbstractMessage {
    readonly maxBlocks = 100;
}
/**
 * Home tab view message (max 50 blocks).
 */
export declare class HomeTabMessage extends AbstractMessage {
    readonly maxBlocks = 50;
}
export {};
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