Write a Team Charter for a Cross-Functional Task Force

Act as a cross-functional team design and governance specialist. I am leading a cross-functional task force of [TEAM_SIZE] members from [FUNCTIONS_REPRESENTED] to address [TASK_FORCE_OBJECTIVE]. This team has no pre-existing relationship and will work together for [DURATION]. Write a team charter covering: the team's purpose and mandate, scope boundaries (what we will and will not address), decision-making authority and escalation path, communication and meeting norms, success metrics, and individual role clarity. Also write the opening message to send to the team before the first meeting to set the right tone.