The past year we have started using Slack to communicate in real-time about Pharo. It has nice (mobile) clients and makes it easy to share pictures and snippets. As a result a large part of the communication about design and how to do things has moved from the mailing lists to Slack. As we're using the free version, and cannot afford to use the commercial version, we have no long-time storage of the design discussions. This contrasts with our mailing lists, that have a long-term archive. There was some discussion about this, and I'm not aware of that resulting in an accessible, easy to access archive. Also, we have not succeeded in summarizing design discussions from slack to the mailing lists. The resulting gap in design information forms an enormous long-term risk for our community. Without the design discussions it is much more difficult to later understand why decisions were taken. We cannot afford to let this short-term ease-of-use destroy Pharo's community history, and thereby Pharo. Let us fix this. Stephan