export declare type EventType = 'compile-started' | 'compile-compiled' | 'compile-errored' | 'lint-linted' | 'lint-errored' | 'format-verified' | 'format-errored' | 'source-files-changed' | 'report';
export declare type Callback = (info?: Report) => void;
export interface Report {
    tool: 'format' | 'lint' | 'test' | 'coverage' | 'compiler';
    status: 'ready' | 'busy';
    errors?: number;
    fixable?: number;
}
export interface Bus {
    signal(eventType: EventType): void;
    report(report: Report): void;
    register(type: EventType, callback: Callback): void;
    registerAll(types: EventType[], callback: Callback): void;
    unregister(callback: Callback): void;
}
export declare let createBus: () => Bus;