import type { OpenAPIV3_1 } from 'openapi-types';
/**
 * Return the set of component schema names (sanitized via toTypeName) that participate in a
 * reference cycle, including direct self-references. A schema is "recursive" when it is
 * reachable from itself through the component-schema reference graph.
 *
 * These schemas cannot be expressed via `z.infer<typeof FooSchema>` once their Zod schema is
 * annotated `z.ZodType<Foo>` (it would be a circular, excessively-deep type instantiation), so
 * the types plugin emits a concrete `interface` for them and the zod plugin annotates the lazy
 * schema with that model type.
 */
export declare function findRecursiveSchemaNames(spec: OpenAPIV3_1.Document): Set<string>;
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