The Presentation Structure Designer

Design the structure of this presentation before I build any slides.

The topic and goal: [DESCRIBE]
The audience: [WHO, HOW MUCH TIME, WHAT THEY NEED]
The desired outcome: [DECISION / BUY-IN / INFORMATION]

Provide:
1. The core message the whole talk should drive toward (in one sentence)
2. A structure/flow that fits the goal (answer-first for decisions,
   narrative for buy-in)
3. What each section must accomplish
4. Where to put the evidence and where to keep it simple
5. A strong open and a clear close with the ask

Structure it around one clear message and the decision I want — not around
everything I know.