Function start

apps/sim/executor/utils.test.ts:21–24

(controller)

    it.concurrent('should return original stream when no response format selection', async () => {
      const mockStream = new ReadableStream({
        start(controller) {
          controller.enqueue(new TextEncoder().encode('{"content": "test"}'))
          controller.close()
        },
      })

      const result = processor.processStream(