import type { ModelProvider, ModelResponse } from '@openai/agents-core';
import { type InvokeModelActivityInput, type InvokeModelStreamActivityInput, type SerializedModelResponse, type SerializedStreamEvent } from '../common/serialized-model';
import { type HostedToolCredentialsResolver } from './hosted-tool-credentials';
export declare function toSerializedModelResponse(response: ModelResponse): SerializedModelResponse;
/**
 * Creates the model Activity functions registered with the Worker. Activities
 * use the provided ModelProvider to resolve models and execute LLM calls.
 */
export declare function createModelActivity(modelProvider: ModelProvider, hostedToolCredentials?: HostedToolCredentialsResolver): {
    invokeModelActivity: (input: InvokeModelActivityInput) => Promise<SerializedModelResponse>;
    invokeModelStreamActivity: (input: InvokeModelStreamActivityInput) => Promise<SerializedStreamEvent[]>;
};