/**
 * Workflow metadata is deployment-specific, so on Vercel it can point at
 * the generated deployment URL. Production callbacks need the stable
 * project production URL instead so other services can post back through
 * the same trusted source configuration users set up for the production
 * agent.
 */
export declare function resolveVercelProductionCallbackBaseUrl(): string | null;
/**
 * Builds a framework-owned callback URL from a resolved callback origin.
 */
export declare function createWorkflowCallbackUrl(baseUrl: string, callbackPath: string): string;