export interface RepeaterConfig {
    readonly threshold: number;
    readonly cooldown: number;
    readonly maxLength: number;
}
export declare const DEFAULT_REPEATER_CONFIG: RepeaterConfig;
export declare function resolveRepeaterConfig(raw: unknown): RepeaterConfig;
export interface RepeaterInboundFields {
    readonly conversation: {
        readonly kind: 'private' | 'group' | 'channel';
        readonly id: string;
    };
    readonly content: string;
    readonly sender?: {
        readonly id: string;
        readonly name?: string;
    } | string;
    readonly metadata?: Readonly<Record<string, unknown>>;
}
/**
 * Best-effort group detection for Plugin Runtime `Message`.
 * Channel type comes from `conversation.kind`（metadata.type/channelType 优先，
 * 兼容早期适配器）；无类型信息时按会话 `kind:id` 作为 group key。
 */
export declare function resolveGroupId(message: RepeaterInboundFields): string | null;
export type RepeaterTickResult = {
    readonly action: 'next';
} | {
    readonly action: 'repeat';
    readonly content: string;
};
export declare class RepeaterEngine {
    #private;
    constructor();
    get totalRepeats(): number;
    get activeGroups(): number;
    tick(message: RepeaterInboundFields, config: RepeaterConfig): RepeaterTickResult;
    statusLines(config: RepeaterConfig): string;
    pruneStale(now?: number, expiry?: number, cooldown?: number): void;
    dispose(): void;
}
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