Earlier quoted context omitted.
Thanks! An archive shouldn't be too hard to implement. Would a morning briefing include more of a curated selection of news, like the most interesting/most discussed news of the day? Currently I just take the top 5 posts from the main page.
Not just the top five, more like http://www.daemonology.net/hn-daily/ which also ensures newness. Because of that, catching up on several days will also be unique stories.
I was looking into using the algolia API to get the top 10 posts of the last day, but those won't be unique over the span of several days.