/**
 * Anthropic Provider
 * Implementation for Claude models with streaming and tools support
 */
import type { LLMRequest, LLMResponse, AnthropicConfig, ModelCapabilities, ProviderBalance, Tool } from '../types.js';
import { BaseProvider } from './base.js';
export declare class AnthropicProvider extends BaseProvider {
    name: string;
    models: string[];
    supportsStreaming: boolean;
    supportsTools: boolean;
    supportsBatching: boolean;
    supportsVision: boolean;
    private apiKey;
    private baseUrl;
    private version;
    constructor(config: AnthropicConfig);
    generateResponse(request: LLMRequest): Promise<LLMResponse>;
    validateConfig(): boolean;
    getModels(): string[];
    estimateCost(request: LLMRequest): number;
    healthCheck(): Promise<boolean>;
    getProviderBalance(): Promise<ProviderBalance>;
    protected getModelCapabilities(): Record<string, ModelCapabilities>;
    private makeAnthropicRequest;
    private formatRequest;
    private formatMessageContent;
    private formatResponse;
    private mapStopReason;
    /**
     * Stream response support with SSE chunk schema validation.
     *
     * Each non-DONE data frame is validated against the expected Anthropic SSE
     * shape. Malformed JSON or a drifted content_block_delta envelope errors the
     * stream with SchemaDriftError (triggering factory fallback) rather than
     * silently producing truncated output.
     *
     * Unknown event types (additive upstream changes) are skipped for
     * forward-compatibility. Only the event types the parser actively reads
     * are validated.
     */
    streamResponse(request: LLMRequest): Promise<ReadableStream<string>>;
    /**
     * Tool usage support
     */
    generateWithTools(request: LLMRequest & {
        tools: Tool[];
    }): Promise<LLMResponse>;
    private getDefaultModel;
}
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