My wife and I use a shared Telegram chat to talk to our claw and it seems pretty fine to be honest. It's useful to just see what the other is getting done but it can be pretty noisy. Usually I'm not that interested in the details of it. Telegram doesn't have a threading notion, but Slack does, so it's particularly well-suited to it. Integrating with Slack is much higher friction, but now that I've thought about it, it's a pretty good idea. I guess I went with Telegram because it's free but we already use Slack.