import type { WorkflowAgentActivity } from "@automatalabs/workflow-engine";
import type { AgentRunner } from "@automatalabs/shared-types";
import type { WorkflowAgentEventPayload } from "./index.js";
export interface WorkflowAgentEventSink {
    observe(event: WorkflowAgentEventPayload): void;
}
export interface WorkflowAgentEventSource {
    attach(sink: WorkflowAgentEventSink): () => void;
}
export declare function workflowAgentEventSource(runner: AgentRunner): WorkflowAgentEventSource;
/** Pure ACP-to-engine adapter. Unknown or unsafe activity stays on the raw event bus only. */
export declare function projectWorkflowAgentActivity(event: WorkflowAgentEventPayload): WorkflowAgentActivity | undefined;
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