我如何用一个周末用 Rust 重写 Kimi CLI

async def agent_loop(chat_provider: ChatProvider, toolset: Toolset):
    system_prompt = "You are a helpful assistant."
    history: list[Message] = []

    while True:
        user_input = input("You: ").strip()
        if not user_input:
            continue
        if user_input.lower() in {"exit", "quit"}:
            break

        history.append(Message(role="user", content=user_input))

        while True:
            result = await kosong.step(
                chat_provider=chat_provider,
                system_prompt=system_prompt,
                toolset=toolset,
                history=history,
            )

            tool_results = await result.tool_results()

            assistant_message = result.message
            tool_messages = [tool_result_to_message(tr) for tr in tool_results]

            history.append(assistant_message)
            history.extend(tool_messages)

            # ... print something

            if not result.tool_calls:
                break

async def main() -> None:
    api_key = os.getenv("E2B_API_KEY")
    if not api_key:
        raise RuntimeError("E2B_API_KEY is required to use E2B sandboxes")

    work_dir_path: str = os.getenv("KIMI_WORK_DIR", DEFAULT_WORK_DIR)
    sandbox: AsyncSandbox = await _get_sandbox()

    e2b_kaos: E2BKaos = E2BKaos(
        sandbox,
        cwd=work_dir_path,
    )
    token = set_current_kaos(e2b_kaos)
    try:
        work_dir: KaosPath = KaosPath(work_dir_path)
        await work_dir.mkdir(parents=True, exist_ok=True)

        async for msg in prompt(
            "You are in a E2B sandbox. Explore the environment. \
             Try all your tools!",
            work_dir=work_dir,
            agent_file=AGENT_FILE,
            yolo=True,
        ):
            print("─" * 60)
            print(msg)
        print("─" * 60)
    finally:
        reset_current_kaos(token)

type Event = (
    TurnBegin
    | SteerInput
    | TurnEnd
    | StepBegin
    | StepInterrupted
    | CompactionBegin
    | CompactionEnd
    | MCPLoadingBegin
    | MCPLoadingEnd
    | StatusUpdate
    | Notification
    | ContentPart
    | ToolCall
    | ToolCallPart
    | ToolResult
    | ApprovalResponse
    | SubagentEvent
)
"""Any event, including control flow and content/tooling events."""


type Request = ApprovalRequest | ToolCallRequest | QuestionRequest
"""Any request. Request is a message that expects a response."""

type WireMessage = Event | Request
"""Any message sent over the `Wire`."""