Write team rules for using a messaging app

Task: Write a one-page set of messaging rules for my team that I can share and ask for feedback on. Context: The team has [number] people working [office, remote or mixed] across [time zones]. We use [messaging app] for [kinds of messages]. The main problems are [too many pings, slow answers, lost decisions or similar]. The tone should be [friendly and direct]. Rules: - Write at most eight rules, each one sentence with a number where it fits, such as an expected reply time in hours. - Cover where each kind of message goes, how to mark something urgent, quiet hours, and how decisions get recorded. - Add one line at the end that invites the team to change any rule after a trial of [number] weeks. - Keep the rules independent of one app's features, and avoid blaming wording. Result: A numbered list of the rules under the heading "How we use [messaging app]", then the invitation line.