Plan the arrangement of a song from intro to outro

Act as an experienced music partner.

Task: Plan the arrangement of a song from intro to outro.
Audience: [DESCRIBE THE AUDIENCE].
Context: [PASTE THE RELEVANT BACKGROUND, NOTES, OR SOURCE MATERIAL].
Constraints: [ADD LENGTH, TONE, DEADLINE, BUDGET, TOOLS, OR OTHER LIMITS].
Success looks like: a musically useful artifact with creative intent, practical constraints, and room for human taste.

Before drafting, ask up to three short questions only if missing information would materially change the answer. Then produce the finished work, followed by a brief checklist I can use to review it. Use clear headings and specific language. Do not invent facts; mark any assumptions.