Encouraging a Culture of Written Communication
As much as possible, encourage people to post anything of interest to the public channels. Notice that I’m saying public channels, and not private messages, because we don’t ping anyone unless it’s necessary. We just want to make the information available.
If you are changing a configuration option on production, considering to do a database migration, or just noticed something interesting in the performance graphs… post it to the chat. When you are making critical changes, this has the benefit of making the action deliberate. Just like the Japanese train conductors who deliberately point at whatever they are checking, you’re much less likely to make mistake that way.
If you’re uncertain about something, or investigated something of interest, but didn’t quite get to the bottom of it… share it in the chat. It gives others a chance to chime in and it builds trust.