async function peekFirstChunk(stream) {
Handling data in streams is fundamental to how we build applications. To make streaming work everywhere, the WHATWG Streams Standard (informally known as "Web streams") was designed to establish a common API to work across browsers and servers. It shipped in browsers, was adopted by Cloudflare Workers, Node.js, Deno, and Bun, and became the foundation for APIs like fetch(). It's a significant undertaking, and the people who designed it were solving hard problems with the constraints and tools they had at the time.，更多细节参见体育直播
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machineState: string; // Internal state machine state
Colored diff view showing how files changed over time (unified, full-context, and raw modes)