/**
 * OpenAIProvider — OpenAI Chat Completions API via raw fetch.
 *
 * Uses the same flat `agent_step` function pattern as GeminiProvider:
 * - Reasoning fields (previous_goal_eval, memory, plan) + action in one tool call
 * - `tool_choice: "required"` forces a tool call every step
 * - `strict: true` guarantees schema adherence
 *
 * No SDK dependency — raw fetch for full React Native compatibility.
 * Implements the AIProvider interface so it can be swapped with GeminiProvider.
 */
import type { AIProvider, ToolDefinition, AgentStep, ProviderResult } from '../core/types';
export declare class OpenAIProvider implements AIProvider {
    private model;
    private baseUrl;
    private headers;
    private enableWebSearch;
    /** Internal config digest for analytics quality metrics */
    _cfgDigest: string;
    constructor(apiKey?: string, model?: string, proxyUrl?: string, proxyHeaders?: Record<string, string>, enableWebSearch?: boolean);
    /**
     * Returns a web_search tool that makes a separate OpenAI Responses API
     * call with web_search_preview. Falls back gracefully on errors.
     */
    createWebSearchTool(): ToolDefinition | null;
    generateContent(systemPrompt: string, userMessage: string, tools: ToolDefinition[], _history: AgentStep[], screenshot?: string, signal?: AbortSignal, userImages?: Array<{
        base64: string;
        mimeType: string;
    }>): Promise<ProviderResult>;
    /**
     * Builds the OpenAI tool definition for `agent_step`.
     * Same flat pattern as Gemini — reasoning fields + action in one function.
     * Uses `strict: true` for guaranteed schema adherence.
     */
    private buildAgentStepTool;
    private buildMessages;
    private parseAgentStepResponse;
    /**
     * Extracts token usage from OpenAI response and calculates estimated cost.
     *
     * Pricing (GPT-4.1-mini):
     * - Input:  $0.40 / 1M tokens
     * - Output: $1.60 / 1M tokens
     */
    private extractTokenUsage;
}
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