import { type Pred } from 'runtyp';
import type { JsonSchema } from './callspecDocumentTypes';
/** Default when `route({ input })` is omitted — same as writing `p.object({})`. */
export declare const emptyObjectInput: Pred<{}>;
/** Default when `route({ output })` is omitted — handler `undefined`, JSON Schema / HTTP `null`. */
export declare const voidSuccess: Pred<undefined>;
export declare function isVoidSuccessPred(pred: Pred<unknown>): boolean;
export declare function predToJsonSchema(pred: Pred<unknown>): JsonSchema;