# Prompt Engineering 4 System Prompt Design

> Sub-skill of prompt-engineering: 4. System Prompt Design.

- Skill: `vamseeachanta/prompt-engineering-4-system-prompt-design` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/prompt-engineering-4-system-prompt-design`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/prompt-engineering-4-system-prompt-design/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/prompt-engineering-4-system-prompt-design

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# 4. System Prompt Design

## 4. System Prompt Design


**Role-Based System Prompt:**
```python
def create_role_system_prompt(
    role: str,
    expertise: list,
    personality: str = "professional and helpful",
    constraints: list = None
) -> str:
    """
    Create a role-based system prompt.
    """
    prompt = f"""You are a {role}.