import type { JSONSchema } from '@trojs/openapi-dereference';
export declare const originSymbol: unique symbol;
/**
 * Resolve a JSON Pointer against the provided schema.
 * The implementation mirrors the one from @trojs/openapi-dereference but is
 * inlined here so we can tweak dereferencing behaviour.
 * Results are cached per schema for performance.
 */
export declare function resolveRefSync(schema: JSONSchema, ref: string): unknown;
export declare function klona(val: any): any;
/**
 * Dereference the given schema while merging JSON-schema annotations that appear next to a $ref node.
 * Circular references are preserved via the originSymbol so downstream code can still detect them.
 */
export declare function dereferenceWithAnnotationsSync(schema: JSONSchema): JSONSchema;