/**
 * Google Gemini provider adapter.
 *
 * Uses a dynamic import so the `@google/generative-ai` 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 Gemini SDK types are inlined below so this file compiles without the
 * `@google/generative-ai` package present in node_modules.
 */
import type { LLMClient, ChatParams, ChatResponse } from "./types.js";
/**
 * LLMClient implementation that wraps the Google Gemini API.
 *
 * The `@google/generative-ai` 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 functionDeclarations format
 * - System instruction passed via model config
 * - Message history with user/model/function roles
 */
export declare class GoogleAdapter implements LLMClient {
    private readonly model;
    private readonly apiKey;
    /** Lazily initialised after the dynamic import succeeds. */
    private genAI;
    constructor(model: string, apiKey?: string);
    /**
     * Lazily import the `@google/generative-ai` package and return the
     * initialised GoogleGenerativeAI client.
     *
     * @throws If the `@google/generative-ai` package is not installed.
     */
    private getGenAI;
    chat(params: ChatParams): Promise<ChatResponse>;
}
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