import { type ChatCompletionToolCallWithExtraContent } from '../../../services/chatState';
export declare const GEMINI_THOUGHT_SIGNATURE_VALIDATOR_BYPASS = "skip_thought_signature_validator";
export declare function isGeminiModel(modelName: string): boolean;
/**
 * Gemini cannot re-pair the proxy-synthesized ids of multiple parallel tool
 * calls replayed in one turn, so a Gemini multi-call turn is recorded as
 * sequential single-call turns (so each function-call turn has exactly one
 * matching response).
 */
export declare function shouldSerializeGeminiToolCalls(modelName: string, toolCalls: ChatCompletionToolCallWithExtraContent[]): boolean;
/**
 * Gemini signs only the first parallel call, and a call restored from a
 * previous run carries no signature at all; both replay with the documented
 * validator-bypass marker. A call that kept its real signature echoes it
 * verbatim.
 */
export declare function withThoughtSignatureFallback(toolCall: ChatCompletionToolCallWithExtraContent): ChatCompletionToolCallWithExtraContent;