/**
 * [WHO]: Provides PendingToolUseSummary, flushReadyToolUseSummaries(), and startToolUseSummary().
 * [FROM]: Depends on AgentLoopConfig/AgentMessage contracts and tool result message shapes.
 * [TO]: Consumed by standard and structured-adaptive agent loops for non-blocking tool summaries.
 * [HERE]: core/lib/agent-core/src/agent-loop-tool-summaries.ts within agent-core; shared tool summary policy.
 */
import type { ToolResultMessage } from "@catui/ai/types";
import type { EventStream } from "@catui/ai/events";
import type { AgentEvent, AgentLoopConfig, AgentMessage } from "./types.js";
export type PendingToolUseSummary = {
    read(): {
        settled: boolean;
        value?: AgentMessage;
    };
};
export declare function flushReadyToolUseSummaries(pendingSummaries: PendingToolUseSummary[], currentMessages: AgentMessage[], newMessages: AgentMessage[], stream: EventStream<AgentEvent, AgentMessage[]>): PendingToolUseSummary[];
export declare function startToolUseSummary(config: AgentLoopConfig, event: {
    assistantMessage: AgentMessage;
    toolResults: ToolResultMessage[];
    contextMessages: AgentMessage[];
    messages: AgentMessage[];
}): PendingToolUseSummary | undefined;