[cpach]

Fly does this and it seems to work well for them: https://news.ycombinator.com/item?id=30380570

At my workplace we have Slack, but not Discourse. We do have Confluence though, which works quite good for stuff that needs to be referenced in future.

[sethammons]

My experience with Confluence is it only works if you have a link to the document. Search is utterly useless. The only search I've found worse is Google Docs. I can be in a meeting and search direct quotes or titles of documents being shared on screen and they will not come up in gdoc's search; I have to request a link every time. Even for documents I've previously opened.