We’ve been trying to improve how notebooks are downloaded and embedded over the past week, and a few things got renamed and moved around.
The old “Download tarball” is now just “Download code”, in the notebook menu. You can click on the link to download the tarball directly, or right-click on “Download code” and choose “Copy link address” to get the URL for the tarball that you can use with Yarn, just like before.
In addition, you can now download (and npm and yarn intstall) tarballs for private notebooks, by using private download urls that expire after a few minutes.
And you can also quickly generate the required code to embed individual cells from public notebooks, by clicking on “Embed code” in the menu of any named cell.