import type { SchemaAdapterInterface } from '../../../utilities/schema';
/**
 * Schema adapter for OpenAI provider.
 * Converts JSON Schema to OpenAI's structured output format.
 */
export declare class OpenAISchemaAdapter implements SchemaAdapterInterface {
    convertSchema(jsonSchema: any): any;
    /**
     * Normalizes JSON Schema for OpenAI structured_response:
     * - For each object, sets required to all property keys.
     * - Any property that was optional becomes nullable.
     */
    private normalizeForOpenAIStructuredResponse;
}