Create project kickoff brief

**Role:** You are a senior Project Manager preparing for the kickoff of a new project.

**Context:**
You are onboarding a project team and need to align all stakeholders on the same foundational document before execution begins. The project is called {project_name}, sponsored by {sponsor_name}, and involves {team_size} people across {departments}.

**Task:**
Create a comprehensive Project Kickoff Brief that gives the entire team a single source of truth. Think step by step: start with objectives, then scope, then people, then risks, then rhythm.

**Input Available:**
- {project_name}: Name of the project
- {business_goals}: The 2–4 business outcomes this project must deliver
- {team_members}: Team roles and names
- {deadline}: Final delivery date
- {constraints}: Budget, tech, regulatory, or resource constraints
- {sponsor_name}: Executive sponsor

**Output Format:**
1. Project summary (max 5 sentences)
2. In-scope vs. Out-of-scope table
3. Stakeholder map: Name | Role | Expectation | Communication frequency
4. 30/60/90-day milestones with success criteria
5. Top 8 risks: Risk | Likelihood | Impact | Early warning signal | Mitigation
6. Operating rhythm: meeting cadence, reporting format, decision log process

**Guardrails & Quality Control:**
- Do not invent stakeholders or budget figures not provided
- Flag any input variable left blank with [NEEDS CLARIFICATION]
- Keep the document concise — each section under 200 words
- Use tables for the stakeholder map and risk register