Build a due diligence checklist for this decision.

What I'm evaluating: {{subject}}
Type of decision: {{decision_type}} (investment, hire, partnership, acquisition, etc.)
My specific concerns: {{concerns}}
Deadline: {{deadline}}

Return organized sections:
- Financial / commercial checks
- Legal / regulatory checks
- Operational / capability checks
- People / culture checks
- Reputation / reference checks
- Strategic fit checks

For each item: the question, where to find the answer, what a red flag looks like. End with: the 3 deal-breakers I should resolve first before spending more time.