**Show Twitter feed in Safari's Sidebar**

Update: It's not the complete feed, just messages with URLs embedded in them.

Being able to see your twitter feed in a Safari Sidebar is pretty cool, and definitely under documented.

0. Add your Twitter credentials to the "Internet Accounts" panel of "System Preferences."
0. Click on the "open book" icon in the new Safari bookmark bar.
0. Select "Shared Links" or use the keyboard shortcut <kbd>^⌘3</kbd> to toggle "Shared Links".

I believe that this is all that I did to be able to see my twitter feed in the safari sidebar.