/**
 * OpenAI-shaped type defs + mock chat/function helpers for CodexSdkAdapter.
 * Extracted to keep codex-sdk-adapter.ts under the 400-line cap.
 */
export interface OpenAIMessage {
    role: 'system' | 'user' | 'assistant' | 'function';
    content: string;
    name?: string;
    function_call?: {
        name: string;
        arguments: string;
    };
}
export interface OpenAICompletionChunk {
    id: string;
    object: 'chat.completion.chunk';
    created: number;
    model: string;
    choices: Array<{
        index: number;
        delta: {
            role?: string;
            content?: string;
            function_call?: {
                name?: string;
                arguments?: string;
            };
        };
        finish_reason?: string | null;
    }>;
    usage?: {
        prompt_tokens: number;
        completion_tokens: number;
        total_tokens: number;
    };
}
export interface OpenAIFunction {
    name: string;
    description: string;
    parameters: Record<string, unknown>;
}
export declare function createOpenAIClient(): object;
export declare function createChatCompletion(params: {
    model: string;
    messages: OpenAIMessage[];
    functions: OpenAIFunction[];
    stream: boolean;
    temperature: number;
}): Promise<AsyncIterable<OpenAICompletionChunk>>;
export declare function executeMockFunction(name: string, arguments_: string): Promise<string>;