I think I like Cloudflare's Accept: text/markdown (#1432463) generic solution better than this mix between skills and documentation - at least based on the examples. The examples really are skill files to consume google's bigtable APIs. Even clicking some of the links in their announcement forces me to log in to admin console and get an API key for it to work.

Soon enough there will be plenty of stuff to buy for this agentic economy because stuff that could be free, is now becoming paywalled. The rent-seeking is insane these days.