Suggestion received on wikitech-l from [[User:Mono]]:
"Could we add support for Twitter cards in Wikimedia projects? It wouldn't
be hard to do and would would be really nice for articles, images, videos -
everything linked from Wikimedia on Twitter could have a nice little
preview on Twitter.
The documentation is at https://dev.twitter.com/docs/cards - basically it
involves adding some meta tags around existing content server-side."
From the Twitter API documentation:
"Twitter cards make it possible for you to attach media experiences to Tweets that link to your content. Simply add a few lines of HTML to your webpages, and users who Tweet links to your content will have a "card" added to the Tweet that’s visible to all of their followers."
Design feedback would be welcome, to test something first on Wikimedia Commons for media files.