/**
 * Event system — typed event bus for vault mutations.
 *
 * Every task/project/context mutation emits a typed event.
 * Consumers:
 *   1. MCP logging notifications (in-session, via sendLoggingMessage)
 *   2. Outbound HTTP webhooks (optional, fire-and-forget)
 *   3. Internal listeners (auto-sync, future extensions)
 */
import { EventEmitter } from "node:events";
export interface VaultEvent {
    event: string;
    timestamp: string;
    task_id?: string;
    project_id?: string;
    title?: string;
    status?: string;
    assignee?: string;
    summary?: string;
    unblocked?: string[];
    metadata?: Record<string, unknown>;
}
export type VaultEventType = "task.created" | "task.claimed" | "task.updated" | "task.completed" | "task.failed" | "task.cancelled" | "task.unblocked" | "task.retried" | "task.escalated" | "task.timed_out" | "task.review_requested" | "task.review_completed" | "task.routed" | "project.created" | "project.appended" | "project.completed" | "decision.logged" | "discovery.logged" | "agent.registered" | "agent.updated" | "note.written" | "note.deleted";
export declare class EventBus extends EventEmitter {
    /**
     * Emit a typed vault event.
     */
    emitEvent(event: VaultEventType, data: Omit<VaultEvent, "event" | "timestamp">): void;
    /**
     * Listen for all vault events.
     */
    onEvent(handler: (event: VaultEvent) => void): void;
    /**
     * Listen for a specific event type.
     */
    onEventType(type: VaultEventType, handler: (event: VaultEvent) => void): void;
}
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