In practice, (and yes, there are always exceptions to be found) BYOB is rarely used to any measurable benefit. The API is substantially more complex than default reads, requiring a separate reader type (ReadableStreamBYOBReader) and other specialized classes (e.g. ReadableStreamBYOBRequest), careful buffer lifecycle management, and understanding of ArrayBuffer detachment semantics. When you pass a buffer to a BYOB read, the buffer becomes detached – transferred to the stream – and you get back a different view over potentially different memory. This transfer-based model is error-prone and confusing:
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它将"你 + 一个 Agent"的对话模式，升级为 "你 → 你的主 Agent → MCO → 多个 Agent 并行执行" 的层级指挥模式。你只跟一个 Agent 对话，但背后有整支军团在为你冲锋。
Google 将 AppFunctions 类比为 Android 的「模型上下文协议」（MCP），可以简单理解为一个对话标准，帮助第三方的 App 应用和 AI 模型进行对接。