A reverse proxy visits a target website on your behalf and returns the result to you. For example, instead of visiting `example.com` directly, you route traffic through Cloudflare Worker and let Worker return the response.

In the AI era, users expect instant responses. The old “wait until done” experience is no longer enough. This post shares how to implement **streaming AI output** and **real-time Markdown rendering** on the web.

While building a Pixiv crawler, I explored many Pixiv endpoints in depth. This article summarizes the main APIs, request patterns, and response structures based on real implementation experience.