import { BaseProvider, type ProviderInfo } from './base.js';
import type { ProviderCallContext } from '../types/lifecycle.js';
import type { CompletionRequest } from '../types/messages.js';
import type { NexusResponse, NexusStream } from '../types/response.js';
import type { AnthropicProviderConfig } from '../types/config.js';
/** Anthropic's Messages API. */
export declare class AnthropicProvider extends BaseProvider {
    /** Always `anthropic`, hosted. */
    readonly info: ProviderInfo;
    private client?;
    private config;
    constructor(config: AnthropicProviderConfig);
    private getClient;
    private formatMessages;
    /** A message's parts as blocks. A tool reference is a block only where the model takes them. */
    private formatBlocks;
    /**
     * The tools on the wire. With tool references, every tool is sent and a deferred one is marked
     * `defer_loading`, so it stays out of the model's context until a reference names it and the
     * tool list, the front of the cached prefix, never changes.
     */
    private formatToolsAnthropic;
    /** Runs one completion. */
    complete(request: CompletionRequest, context?: ProviderCallContext): Promise<NexusResponse>;
    /** Streams one completion. */
    stream(request: CompletionRequest, context?: ProviderCallContext): NexusStream;
    private createParams;
    private textFromContent;
    private requestOptions;
    private withProviderModel;
    private stripConfiguredPrefix;
}