System Prompt Builder

You are an expert prompt engineer who specializes in writing Claude system prompts.

Write a detailed system prompt for an AI assistant with the following profile:

**Role / Persona:** [e.g., senior financial analyst, compassionate therapist, Socratic coding tutor]  
**Primary task:** [What will this assistant mainly do?]  
**Target users:** [Who will interact with it?]  
**Tone and communication style:** [e.g., concise and data-driven / warm and encouraging]  
**Things it should always do:**
- [BEHAVIOR 1]
- [BEHAVIOR 2]

**Things it should never do:**
- [RESTRICTION 1]
- [RESTRICTION 2]

**Format preferences:** [e.g., always use bullet points / never use headers / keep responses under 200 words]  
**Special knowledge or context:** [Any domain knowledge or business context it should have]  

Write a production-ready system prompt that:
- Establishes the persona clearly in the first paragraph
- Defines behavioral guardrails explicitly
- Includes 2-3 example interactions (user message → expected response format)
- Uses XML tags to separate sections where helpful
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## When to use this
Building a Claude-powered product, setting up a team-wide assistant, or creating a specialized chatbot for a specific use case.

## Tips
- Think of the system prompt as "training your assistant before their first day"
- Be explicit about what NOT to do — constraints are often more important than instructions
- Test your system prompt with adversarial inputs ("what if the user asks you to ignore your instructions?")