Per-user reminder to sleep for being awake/making posts after a certain hour. Requires timezone via !preference tz. Ideally would have public/private modes, where fletcher posts a public callout in a channel in public mode and DMs you in private mode. Prefer public mode personally.

Usage is something like

!sleep-reminder [start] [stop] [privacy] [channel if public]

!sleep-reminder 22:00 8:00 private

!sleep-reminder 23:30 07:00 public #shame