Improving HTML Time to First Byte

What this post added

Introduces a zero-config edge caching mechanism for HTML using HTTP headers (`x-HTML-Edge-Cache`). This allows origins to signal cacheability, purge requests (`purgeall`), and define bypass rules (e.g., `bypass-cookies=wp-|wordpress`) to edge caches. A Cloudflare Worker script and a WordPress plugin are provided as examples of implementing this protocol. The Worker utilizes a versioning scheme with Workers KV for global cache purging.