/**
 * Cross-environment executor adapter for Google's native Gemini `generateContent` endpoint.
 *
 * @module @nhtio/adk/batteries/llm/gemini_generate_content/adapter
 *
 * @remarks
 * Targets `POST {baseURL}/models/{model}:generateContent` (and `:streamGenerateContent` when
 * `stream` is set) — Gemini's OWN wire format, not an OpenAI-compatible façade in front of it.
 *
 * That distinction is the reason this battery exists. Pointing `openai_chat_completions` at a
 * Gemini-compatible gateway means some translator, not the ADK, decides how your primitives become
 * `contents[]` — including whether a `thoughtSignature` is stamped, whether consecutive same-role
 * turns get merged, and how a tool result is correlated to its call. For ordinary use that is fine.
 * For anything that needs to reason about what the VENDOR actually received — an ordering guard, a
 * wire-shape audit, a bug report against Google — the translation has to be ours and observable.
 * See the validation battery's "Which API surface a rule applies to" guide.
 *
 * Options layer exactly as the other batteries: constructor baseline → `executor()` overrides →
 * per-iteration `ctx.stash.geminiGenerateContent`, re-validated each iteration.
 */
import type { DispatchExecutorFn } from "../../../types";
import type { GeminiGenerateContentAdapterOptions } from "./types";
/**
 * Native Gemini `generateContent` executor adapter.
 *
 * @example
 * ```ts
 * const adapter = new GeminiGenerateContentAdapter({
 *   model: 'gemini-2.5-flash-lite',
 *   apiKey: process.env.GEMINI_API_KEY,
 * })
 * const runner = new TurnRunner({ executorCallback: adapter.executor(), ... })
 * ```
 */
export declare class GeminiGenerateContentAdapter {
    #private;
    /** Per-iteration override key on `ctx.stash`. */
    static readonly STASH_KEY: "geminiGenerateContent";
    /**
     * @param options - Constructor-baseline options, re-validated每 iteration after overrides merge.
     * @throws {@link E_INVALID_GEMINI_GENERATE_CONTENT_OPTIONS} when `options` is invalid.
     */
    constructor(options: unknown);
    /** Narrowing guard for cross-realm instances. */
    static isGeminiGenerateContentAdapter(value: unknown): value is GeminiGenerateContentAdapter;
    /**
     * Build a {@link DispatchExecutorFn} bound to the baseline plus optional executor-scope overrides.
     *
     * @param overrides - Higher precedence than the baseline, lower than `ctx.stash`.
     */
    executor(overrides?: Partial<GeminiGenerateContentAdapterOptions>): DispatchExecutorFn;
}