@ai-sdk/provider-utils/src/to-json-schema/zod3-to-json-schema/parsers/enum.ts

import type { ZodEnumDef } from 'zod/v3';

export type JsonSchema7EnumType = {
  type: 'string';
  enum: string[];
};

export function parseEnumDef(def: ZodEnumDef): JsonSchema7EnumType {
  return {
    type: 'string',
    enum: Array.from(def.values),
  };
}