import { ToolObserverPlugin, type ObserverSubscription } from './observer';
import type { ObserverContext, ObserverResult } from './types';
export interface PluginDefinition {
    name: string;
    version: string;
    on: ObserverSubscription;
    run(ctx: ObserverContext): Promise<ObserverResult>;
}
export declare function definePlugin(def: PluginDefinition): ToolObserverPlugin;