/**
 * Backwards-compatible provider capability helpers.
 *
 * New AI Gateway routing owns provider descriptors in
 * src/api/ai-gateway/providers/ProviderRegistry.ts. Keep this module only for
 * legacy runtime surfaces that still need default base URL constants.
 */
export declare function getDefaultBaseUrl(provider?: string): string;
export declare function supportsResponsesApi(baseUrl: string): boolean;
export declare function supportsMessagesApi(baseUrl: string): boolean;
/**
 * For codex wire_api selection: only native OpenAI uses Responses wire protocol.
 * All other providers should use Chat Completions wire unless explicitly migrated.
 */
export declare function codexWireApi(baseUrl: string): 'responses' | 'chat';