When we set out to create a newsreader for teams context was key for us.
Using email, Slack, AIM, and other services over the years we found that rarely is context really added to articles in a meaningful way.
A comment at the end or when sharing, doesn't focus the parts of the article that matter. So we did something about it.
We created inline annotation with @ tagging for your teammates as well as a global variable for your team with @team.
Because context matters and letting people know the most important parts of articles and why it matters helps us all improve.