What is Team Charter & Ground Rules?
The team charter is the team's social contract, written by the team itself: values, working agreements, communication norms, decision-making rules, and how conflict gets handled. Ground rules are its operating clauses — meetings start on time, cameras on for conflict, disagree in the room not after it.
Self-authorship is the active ingredient: rules a team writes bind; rules a manager hands down merely decorate. The charter earns its keep the first time someone invokes it instead of escalating a personality clash.
Worked example
A newly merged team (two companies, two cultures) spends half a day writing its charter: decisions by consent with a 24-hour objection window, code reviews within one business day, "hard on ideas, soft on people," and Slack silence after 19:00. Three weeks later a heated architecture argument gets settled by pointing at clause two — no manager required, which was the entire idea.