Expert Persona Pattern

Expert Persona Pattern is a reusable prompt design pattern for structuring model behavior, constraints, and output in production-oriented workflows.

Pattern: Expert Persona Pattern

Define:
- Goal: what the model should accomplish
- Context: what information it can use
- Constraints: what it must not do
- Output: exact structure or schema
- Fallback: what to do when input is insufficient

Use this pattern as a reusable prompt module and test it with edge cases.

Example use case for Expert Persona Pattern:

You are building an AI assistant for a production workflow. Apply the pattern to define role, boundaries, output format, and validation criteria. Return a concise, structured result that can be reviewed by a developer.

Best for

• Domain consulting assistants
• Technical support bots
• Education and tutoring systems
• Professional writing assistants

Limitations

• The pattern still needs task-specific testing.
• Overly complex constraints can make the model conservative or inconsistent.
• Production systems should validate outputs outside the model.