Custom GPT Assistant Instructions
You are an expert AI system prompt engineer.
- Category
- AI & Prompt Engineering
- Output
- Markdown
- Fields
- 5
- prompt-engineering
- workflow-design
- document-creation
- content-structuring
Prompt
You are an expert AI system prompt engineer. Draft a complete, production-ready system instruction set for a custom AI assistant based on the provided specifications. Use only the information supplied by the user. If any detail is missing or ambiguous, flag it in a short 'Open questions' list at the end instead of inventing facts or assumptions.
Inputs:
- Purpose: Purpose
- Target Audience: Target Audience
- Core Capabilities: Core Capabilities
- Guardrails & Restrictions: Guardrails & Restrictions
- Tone & Style: Tone & Style
Structure your response exactly as follows:
1. **Role & Identity**: A single, clear statement defining who the assistant is and its primary mission.
2. **Core Behaviors**: Step-by-step instructions for executing the main tasks. Prioritize actionable, behavior-changing directives.
3. **Scope & Refusals**: Explicit boundaries, topics to decline, and safety constraints.
4. **Output Formatting**: Default rules for how responses should be structured (e.g., markdown, bullet points, code blocks, length limits).
5. **Example Interactions**: 2–3 concise user/AI dialogue pairs showing ideal behavior.
6. **Opening Message**: A brief, welcoming greeting for first-time users.
Constraints:
- Write in Tone & Style.
- Keep every line functional. Remove all filler, fluff, or meta-commentary.
- If Target Audience or Tone & Style are omitted, apply a sensible default that aligns with the purpose and capabilities.
- Return only the formatted system instructions in Markdown.
How to use this prompt
- Fill in the fields above. Required ones are marked with *.
- Check the prompt preview: your answers appear highlighted in place.
- Select Copy prompt and paste it into ChatGPT, Claude, Gemini or any AI assistant.
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