import type { AgentResponse, Message as AgentMessage } from "../schemas/index.js";
import type { ForkPart } from "./fork-runtime-types.js";
type StreamedToolCallState = {
    toolCallId: string;
    toolName: string;
    inputText: string;
    input: unknown;
    status: "pending" | "completed" | "error";
    output?: unknown;
    errorText?: string;
};
type StreamedMessage = {
    role: "assistant" | "tool";
    parts: AgentMessage["parts"];
};
export type StreamedStepState = {
    text: string;
    toolCalls: Map<string, StreamedToolCallState>;
    messages: StreamedMessage[];
    streamError?: Error;
};
export declare function createAgentRuntimeForkAbortError(abortSignal?: AbortSignal): Error;
/** State for create streamed step. */
export declare function createStreamedStepState(): StreamedStepState;
/** State for apply part to streamed step. */
export declare function applyPartToStreamedStepState(state: StreamedStepState, part: ForkPart): void;
/** Response payload for resolve fork step. */
export declare function resolveForkStepResponse(input: {
    responsePromise: Promise<AgentResponse>;
    responseTimeoutMs: number;
    abortSignal?: AbortSignal;
    currentMessages: readonly AgentMessage[];
    streamedStepState: StreamedStepState;
}): Promise<AgentResponse>;
export {};
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