/**
 * GAIA Agent — Gemini 2.5 Pro Thinking adapter (Phase 2 pilot)
 *
 * Adapts the existing GAIA tool catalogue to Google's generateContent API,
 * translating Anthropic tool_use ↔ Gemini functionCall/functionResponse.
 *
 * Loop algorithm mirrors gaia-agent.ts:
 *   1. Build initial contents array with system instruction + first user turn.
 *   2. Call Gemini generateContent with functionDeclarations.
 *   3. On functionCall parts: execute tools, append functionResponse, repeat.
 *   4. On text-only response: scan for FINAL_ANSWER pattern.
 *   5. On maxTurns: return timedOut result.
 *
 * Gemini 2.5 Pro pricing (2026-05-28, per million tokens):
 *   Input:   $1.25 (≤200k tokens), $2.50 (>200k)
 *   Output:  $10.00 (≤200k tokens), $15.00 (>200k)
 *   Thinking tokens are billed as output tokens.
 *
 * Cost gate for pilot: ≤$0.12 per question average.
 * Expected per-question cost at ~10k input + ~2k output: ~$0.032 — well within gate.
 *
 * Refs: ADR-133, ADR-135, #2156 Phase 2
 */
import { GaiaQuestion } from './gaia-loader.js';
import { GaiaToolCatalogue } from './gaia-tools/index.js';
export declare const DEFAULT_GEMINI_MODEL = "gemini-2.5-pro";
export interface GeminiAgentResult {
    questionId: string;
    finalAnswer: string | null;
    turns: number;
    toolCallsByName: Record<string, number>;
    totalInputTokens: number;
    totalOutputTokens: number;
    totalThinkingTokens: number;
    wallMs: number;
    estimatedCostUsd: number;
    timedOut?: boolean;
    error?: string;
}
export interface GeminiAgentOptions {
    model?: string;
    maxTurns?: number;
    maxTokensPerTurn?: number;
    perTurnTimeoutMs?: number;
    apiKey?: string;
    catalogue?: GaiaToolCatalogue;
}
export declare function resolveGeminiApiKey(apiKey?: string): string;
export declare function runGeminiAgent(question: GaiaQuestion, options?: GeminiAgentOptions): Promise<GeminiAgentResult>;
export declare function isGeminiAnswerCorrect(modelAnswer: string, expected: string): boolean;
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