hashtag-include
This is in NO WAY affiliated with Slack, just an app I wanted for personal use and figured I'd put it in the store in case others felt the same. Get the official Slack extension at https://chrome.google.com/webstore/detail/slack/jeogkiiogjbmhklcnbgkdcjoioegiknm Grab the source - https://github.com/hashtag-include/slacky Submit issues - https://github.com/hashtag-include/slacky/issues