[notatoad]

signed web bundles [1] let you package up a page as a fixed resource, distributed with a signature to verify that the content of that page is what the author intended it to be, so a site like twitter that is embedding it can be sure that what they're embedding is always the original resource.

however, this is part of AMP, and so web developers who prefer the "do whatever the fuck you want" aspect of the internet push back against it. the ability to ensure that a web link contains the same content at a future date as it did when it was initially crawled was one of the things we destroyed along with AMP.

[1] https://github.com/WICG/webpackage