File core-headers.test.ts

packages/core/src/__tests__/core-headers.test.ts:None–None

import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { CopilotKitCore } from "../core";
import { ProxiedCopilotRuntimeAgent } from "../agent";
import { HttpAgent } from "@ag-ui/client";