[callahad]

It is impossible to use AMP as a standalone Custom Element library and still validate as AMP. Valid AMP is required to dynamically load the library from Google's unversioned CDN.

[SquareWheel]

That's true. But it's still valid HTML. It's most definitely not a fork of anything.

>unversioned CDN

Isn't the filename versioned (v0.js)?

[callahad]

Not really. The project leaders have explicitly stated that the content of the script at that URL is subject to change at any time, and thus users are prohibited from locking it to an audited, known version with an SRI hash.

[SquareWheel]

I see. Thanks for the clarification. That is pretty poor practice.

I guess v0 might imply "beta" and thus not have stable API naming yet. But still, it's clearly being used in production at this point.