/**
 * OpenAI provider adapter.
 *
 * Uses a dynamic import so the `openai` package is an optional peer dependency.
 * If the package is not installed, a clear installation error is thrown at
 * call-time rather than at module load time.
 *
 * All OpenAI SDK types are inlined below so this file compiles without the
 * `openai` package present in node_modules.
 */
import type { LLMClient, ChatParams, ChatResponse } from "./types.js";
import type { ProviderName } from "./factory.js";
/**
 * LLMClient implementation that wraps the OpenAI chat completions API.
 *
 * The `openai` npm package is dynamically imported so it remains an optional
 * peer dependency. If the package is absent a descriptive install error is
 * thrown on the first call.
 *
 * Supports:
 * - Function/tool calling via the tools array format
 * - Parallel tool calls
 * - Custom base URL for OpenAI-compatible endpoints
 * - Optional provider-level configuration
 */
export declare class OpenAIAdapter implements LLMClient {
    private readonly model;
    private readonly apiKey;
    private readonly baseURL;
    private readonly providerConfig;
    /**
     * Provider key used for CostMeter lookups. Defaults to "openai"; overridden
     * to "openai-compat" by {@link OpenAICompatAdapter} so DeepSeek/Grok prices
     * are looked up instead of OpenAI's (they share this class's `chat()`).
     */
    protected readonly costProvider: ProviderName;
    /** Lazily initialised after the dynamic import succeeds. */
    private client;
    constructor(model: string, apiKey?: string, endpoint?: string, providerConfig?: Record<string, unknown>);
    /**
     * Lazily import the `openai` package and return the initialised client.
     *
     * @throws If the `openai` package is not installed.
     */
    private getClient;
    chat(params: ChatParams): Promise<ChatResponse>;
}
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