Custom GPT Persona Builder

Help me create a detailed custom GPT persona. I'll describe the use case, and you'll generate a complete system prompt.

Ask me these questions first:
1. What is the primary purpose of this GPT? (e.g., customer support, writing assistant, tutor)
2. Who is the target audience? (beginners, professionals, students)
3. What tone should it have? (formal, casual, encouraging, direct)
4. What topics should it be an expert in?
5. What should it absolutely NOT do? (boundaries and restrictions)
6. Should it ask clarifying questions or make assumptions?
7. How should it format responses? (bullet points, paragraphs, step-by-step)
8. Are there specific phrases, greetings, or sign-offs it should use?

Then generate:

## System Prompt
The complete system instruction (ready to paste into OpenAI's Custom GPT builder)

## Conversation Starters
4 example conversation starters for the GPT

## Knowledge Files
Suggest what reference documents would improve the GPT's responses

## Testing Scenarios
5 test prompts to verify the GPT works as intended, with expected behavior notes

Keep the system prompt under 800 words. Make the persona feel natural, not robotic.